1999-2023 GMC Sierra 1500 Problems: 18 Issues Every Owner Should Know

1999-2023 model years · 4,765+ owner reports · Updated May 2026

According to Au7o's analysis of 4,765+ owner reports, the 1999-2023 GMC Sierra 1500 has 18 documented known issues, with 7 rated critical. The most serious are AFM/DFM Lifter Collapse and Failure ($4,000-$8,000 repair), 8-Speed/10-Speed Transmission Torque Converter Shudder ($150-$4,500 repair), Electronic Brake Control Module Failure ($150-$1,500 repair), Transfer Case Unintended Shift to Neutral ($0-$0 repair), Rusting Brake Lines Leading to Fluid Loss and Sudden Brake Failure ($800-$2,500 repair), Fuel Pump Module Failure Causing No-Start or Stalling ($500-$1,200 repair) and 4L60-E / 4L65-E Sun Shell Failure Causing Loss of Reverse and 2nd/4th Gear ($1,800-$3,500 repair). The most commonly reported issue is AFM/DFM Lifter Collapse and Failure with 1,250 owner reports. Across all issues, repair costs range from $50 to $8,000. DIY maintenance guides at au7o.io.

All 18 Known Issues

When Issues Typically Appear

Upper Dash Pad Cracking and Interior Panel Failure in Sun-Exposed GMT800/GMT900 Trucks

40K-150K

AFM/DFM Lifter Collapse and Failure

50K-100K

Fuel Level Sensor Failure Causing Erratic or Inoperative Gas Gauge

50K-140K

Stepper Motor Instrument Cluster Failure Causing Inaccurate Gauges

50K-150K

Blend Door / HVAC Actuator Failure Causing Clicking Behind Dash and Incorrect Air Temperature or Mode

50K-180K

Direct Injection Carbon Buildup on Intake Valves

60K-100K

Knock Sensor Water Intrusion Under Intake Causing Check Engine Light and Reduced Performance

60K-150K

Front Hub Bearing Assembly Failure Causing ABS Activation, Noise, and Wheel Play

60K-150K

Rusting Brake Lines Leading to Fluid Loss and Sudden Brake Failure

70K-200K

Power Door Lock Actuator Failure Causing Intermittent or Inoperative Locking

70K-160K

Fuel Pump Module Failure Causing No-Start or Stalling

80K-180K

4L60-E / 4L65-E Sun Shell Failure Causing Loss of Reverse and 2nd/4th Gear

90K-180K

050K100K150K200K mi

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890 owners

On the 2015-2023 GMC Sierra 1500, the 8L90 8-speed and 10L80/10L90 10-speed automatic transmissions experience shuddering during light throttle acceleration, particularly at highway speeds between 35-60 mph. The issue is caused by the torque converter lock-up clutch slipping and chattering. Harsh shifts between gears, especially 1st to 2nd and 2nd to 1st, are also commonly reported.

This issue also affects: Acura MDX, Audi A4 Avant, Audi A4

Common Symptoms

Vibration or shudder during light acceleration at 35-60 mph
Harsh or jerky shifts between gears
Transmission slipping sensation
Shudder when torque converter locks up
Intermittent transmission hesitation

How to Fix

Transmission fluid flush with updated Mobil 1 Synthetic LV ATF HP fluid (GM part number 19417577). Torque converter replacement. Transmission control module software update. Complete transmission replacement in severe cases.

What Owners Are Using

Parts and tips from 890+ owners who fixed this issue

TipRequest the updated Mobil 1 Synthetic LV ATF HP fluid specifically - older fluid formulation contributes to shudder
UpgradeTransmission flush kit for complete fluid exchange to address shudder (Liqui Moly Transmission Flush Kit)
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UpgradeFull synthetic ATF designed to reduce shudder in automatic transmissions (Valvoline MaxLife ATF Full Synthetic)
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Typical repair cost:$150 - $4,500

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234 owners

On the 2014-2015 GMC Sierra 1500, an electrical signal short in the transfer case can cause it to shift to neutral without driver input while driving. This results in sudden loss of power to the wheels creating a serious safety hazard, particularly at highway speeds or when towing.

This issue also affects: Cadillac Escalade ESV, Chevrolet Silverado 2500HD, Chevrolet Colorado

Common Symptoms

Sudden loss of power while driving
Transfer case shifts to neutral unexpectedly
Service 4WD message on dash
Vehicle rolls freely as if in neutral

How to Fix

Recall repair: Replace transfer case encoder motor and reprogram transfer case control module. Inspect and repair wiring harness.

What Owners Are Using

Parts and tips from 234+ owners who fixed this issue

TipNHTSA Recall 14V-461 covers 2014-2014 Sierra 1500 for transfer case shifting to neutral while driving - free dealer repair. If your truck was built before the recall fix, confirm remedy was applied at nhtsa.gov. For 2015-2019 models, TSB PIT5710 covers intermittent neutral drops traced to the transfer case encoder motor (GM 19168897) losing position data. Dealer reprogram resolves software-induced drops; mechanical failures require encoder motor replacement.
UpgradeTransfer case encoder motor (ACDelco 19168897, also superseded by GM 84203374) is the most commonly replaced component for 2014-2020 Sierra 1500 4WD neutral shift issues. The motor's Hall-effect position sensor fails, causing the TCCM to lose track of transfer case position and command a neutral shift as a failsafe. Encoder motor replacement is a 2-3 hour DIY job. Always change transfer case fluid (ACDelco Auto-Trak II, part 88900402) when replacing the encoder motor. (ACDelco #84203374)
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NoteA transfer case dropping to neutral at highway speed eliminates engine braking and drive torque instantly - this is a crash risk. If your Sierra has shifted to neutral unexpectedly even once, pull over safely and do not drive until inspected. Document the event with exact speed, road conditions, and whether 4WD was engaged. File an NHTSA complaint if recall 14V-461 does not cover your VIN. Also check transfer case fluid level - low fluid accelerates encoder motor wear.

Typical repair cost:$0 - $0

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On the 2000-2007 GMC Sierra 1500, on GMT800 Sierra 1500 trucks equipped with the 4L60-E family automatic, a well-known internal failure is cracking or stripping of the reaction sun shell. Owners commonly report sudden loss of reverse, no 2nd gear, no 4th gear, or a truck that starts in 3rd gear after a bang or flare. This is widely documented in transmission rebuild literature, repair databases, and owner reports for GM trucks and SUVs using this transmission.

This issue also affects: Acura CL, Acura TL, Audi A4 Avant

Common Symptoms

loss of reverse
no 2nd gear
no 4th gear
harsh bang followed by missing gears
transmission starts in 3rd gear
slipping on acceleration

How to Fix

Diagnosis usually starts with verifying gear loss patterns, checking line pressure, and scanning for ratio/performance codes before condemning the unit. Repair requires transmission removal and overhaul or replacement, typically installing an upgraded hardened sun shell such as the commonly recommended 'Beast' style shell along with inspection of clutches, band, pump, and valve body wear items.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipIf rebuilding, owners and transmission builders commonly recommend upgrading to a hardened 'Beast' sun shell rather than reusing stock internals.
TipBefore teardown, verify fluid condition and scan for ratio codes; a worn valve body can mimic some shift complaints but will not restore a broken sun shell.

Typical repair cost:$1,800 - $3,500

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345 owners

On the 2014-2023 GMC Sierra 1500, the electronic brake control module (EBCM) experiences failures causing ABS, traction control, and stability control systems to malfunction. Issues range from warning lights illuminating to complete system failures. The 2023 models have a specific recall for software that may fail to display a warning light when brake fluid loss occurs.

This issue also affects: BMW 3 Series, Chevrolet Monte Carlo, Chrysler 300

Common Symptoms

ABS warning light illuminated
Traction control and stability control warning lights
Service Brake Assist message on dash
ABS system activates unexpectedly or not at all
Brake pedal feels different or spongy
Multiple warning lights illuminate simultaneously

How to Fix

EBCM software reprogramming at dealer. EBCM replacement. Wheel speed sensor replacement if sensor-related. Check and repair wiring connections.

What Owners Are Using

Parts and tips from 345+ owners who fixed this issue

TipNHTSA Recall 23V-647 covers 2023 Sierra 1500 for EBCM software that may not illuminate the brake warning light during low fluid conditions. Verify your VIN at nhtsa.gov before paying for any diagnosis - this recall is a free dealer reflash. For 2014-2022 models, TSB 22-NA-184 covers EBCM communication faults causing spurious ABS/StabiliTrak lights; repair is a module reprogram using GDS2 diagnostic software.
UpgradeBefore replacing the EBCM (ACDelco 84598793 for 2019-2023 Sierra 1500, ~$450 list), always scan wheel speed sensor codes first. Codes C0035-C0050 indicate wheel speed sensor failure - a $40-80 part - that mimics EBCM failure. Dirty or corroded wheel speed sensor tone rings (especially on rear axle) also trigger false EBCM codes. Clean tone rings and retest before condemning the module. (ACDelco #84598793)
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NoteA failed EBCM disables ABS, StabiliTrak, and trailer sway control simultaneously. Driving without these systems is legal but significantly increases stopping distances on wet or icy roads. If the 'Service Brake Assist' message appears, avoid high-speed driving and towing until repaired. Replacement EBCM units require dealer-level programming with a Security Link Tool (SPS) - aftermarket units cannot be self-programmed. Expect $150-300 in programming fees on top of part cost.

Typical repair cost:$150 - $1,500

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On the 1999-2007 GMC Sierra 1500, corrosion of steel brake lines is a major safety issue on older Sierra 1500 trucks, especially in salt-belt states. Owners report the brake pedal suddenly dropping to the floor when a rusted line bursts during normal braking, often near the ABS module or along the frame rails. The problem is heavily documented in NHTSA complaints and repair forums for GMT800 trucks and related GM full-size pickups.

This issue also affects: Chevrolet Silverado 1500, Ford F-150

Common Symptoms

brake pedal suddenly goes to floor
brake fluid leak under truck
reduced braking performance
ABS warning light may illuminate
visible rust and scaling on brake lines

How to Fix

Inspect all hard brake lines from the master cylinder/ABS module to the rear axle and front calipers, paying close attention to flaking rust and wet spots. Spot repairs may buy time, but many owners end up replacing the full line set with pre-bent stainless or coated steel lines because multiple sections are usually compromised. After replacement, the system must be properly bled, including ABS bleed procedures when needed.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipIf one line has burst from rust, inspect the entire system immediately; many owners find the remaining lines are close behind.
TipIn rust-belt trucks, replacing all hard lines at once is often cheaper long-term than repeated patch repairs.
UpgradePre-bent stainless kits are popular because they resist future corrosion better than plain steel replacements. (Dorman Stainless Steel Brake Line Kit)
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UpgradeFresh DOT 3/4 fluid is needed after line replacement and full system bleeding. (Bosch DOT 4 Brake Fluid)
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Typical repair cost:$800 - $2,500

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On the 2014-2023 GMC Sierra 1500, the Active Fuel Management (AFM) and Dynamic Fuel Management (DFM) systems use special hydraulic lifters that collapse to deactivate cylinders for fuel economy. These lifters are prone to premature failure due to poor physical design and inadequate oil flow. Failures can occur as early as 4-digit mileage on newer trucks or 50,000-100,000 miles on older models. When a lifter fails, it can cause catastrophic engine damage requiring complete engine teardown.

This issue also affects: Buick LeSabre, Buick Park Avenue, Buick Encore

Common Symptoms

Engine misfires or rough idle
Check engine light with cylinder misfire codes
Ticking or knocking noise from engine
Reduced engine power
Metal shavings in oil
Engine vibration during cylinder deactivation

How to Fix

Replace all 16 lifters and associated components (camshaft inspection recommended). Install AFM/DFM delete kit to disable cylinder deactivation permanently. Use AFM/DFM disabler device to prevent system activation. Use high-quality synthetic oil and change at 5,000 mile intervals.

What Owners Are Using

Parts and tips from 1,250+ owners who fixed this issue

TipConsider installing an AFM disabler device immediately on purchase - costs $300-400 and may prevent $8,000 repair
UpgradeUse Mobil 1 or equivalent high-quality synthetic oil with zinc additives
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Typical repair cost:$4,000 - $8,000

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345 owners

On the 2014-2023 GMC Sierra 1500, direct injection engines do not spray fuel over the intake valves like port injection systems, allowing carbon deposits from oil and blow-by gases via the PCV system to accumulate on intake valve backs and ports. Over time, this buildup restricts airflow causing performance and efficiency loss. The 5.3L and 6.2L engines with direct injection are susceptible to this issue typically after 60,000-100,000 miles.

This issue also affects: Buick LeSabre, Buick Park Avenue, Buick Encore

Common Symptoms

Reduced fuel economy
Rough idle
Hesitation during acceleration
Engine misfires
Reduced power output
In severe cases, engine knock or pinging

How to Fix

Walnut shell blasting of intake valves (professional service). Chemical intake cleaning treatment. Install oil catch can to reduce PCV contamination. Manual intake manifold removal and valve cleaning.

What Owners Are Using

Parts and tips from 345+ owners who fixed this issue

TipInstall a catch can immediately on new trucks - prevents buildup for $100-200 investment
UpgradeIntake manifold gasket set seals coolant and vacuum leaks (Fel-Pro Intake Manifold Gasket Set)
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UpgradeReplacement intake manifold for cracked or warped originals (Dorman Intake Manifold)
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Typical repair cost:$400 - $800

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On the 2000-2006 GMC Sierra 1500, the 4.8L, 5.3L, and 6.0L Vortec engines used in early GMT800 Sierra trucks place the knock sensors in wells beneath the intake manifold, where water can collect and corrode the sensors or harness. Owners frequently report recurring check-engine lights, timing retard, and reduced power, especially after washing the engine bay or driving in wet conditions. GM issued service information addressing knock sensor corrosion and revised sealing practices.

This issue also affects: Chevrolet Silverado 1500, GMC Yukon XL

Common Symptoms

check engine light
reduced power
poor acceleration
intermittent spark retard
codes return after rain or washing
rough running under load

How to Fix

Diagnosis involves scanning for knock sensor circuit codes, checking freeze-frame data, and inspecting the sensor wells and sub-harness under the intake for moisture or corrosion. Proper repair is replacement of both knock sensors and the harness, cleaning the valley area, and resealing the intake and sensor openings with the updated grommets/sealant procedure to prevent repeat failures.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipReplace both sensors and the sub-harness together; many owners report repeat failures when only one sensor is changed.
TipUse dielectric grease and follow the updated sealing method around the sensor boots to reduce future water intrusion.

Typical repair cost:$400 - $900

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On the 2000-2007 GMC Sierra 1500, a common GMT800 Sierra problem is failure of the in-tank fuel pump module, often from worn pump motors or failed level-sender/module electronics. Owners report long crank, hard starting, loss of power under load, or sudden stall/no-start conditions, especially as mileage climbs. This issue is widely documented in owner forums and complaint databases across 4.3L, 4.8L, 5.3L, and 6.0L trucks.

This issue also affects: Alfa Romeo Giulia, Alfa Romeo Stelvio, Buick LeSabre

Common Symptoms

long crank before starting
intermittent no-start
engine stalls while driving
loss of power on acceleration
fuel gauge may act erratically if sender/module is failing
whining noise from fuel tank

How to Fix

Diagnosis usually starts with checking fuel pressure at the rail and verifying pump prime at key-on. Low or unstable pressure, especially after sitting, points to a weak pump or failing module. Repair is replacement of the complete fuel pump module and, ideally, the fuel filter on applicable years; corroded electrical connectors at the tank should also be inspected and replaced if heat-damaged.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipConfirm fuel pressure with a mechanical gauge before replacing parts; weak pumps can still be heard priming but fail to meet pressure spec.
TipIf replacing the pump, inspect the tank-side connector for heat damage and replace the pigtail if the terminals are discolored or loose.
UpgradeOwners commonly use a complete OEM-style module rather than a pump-only insert because it also renews the sender and regulator components. (ACDelco GM Original Equipment Fuel Pump Module Assembly)
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UpgradeReplacing the inline fuel filter on applicable GMT800 trucks helps protect the new pump and restore proper flow. (WIX Fuel Filter)
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Typical repair cost:$500 - $1,200

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On the 2003-2007 GMC Sierra 1500, a very common GMT800 complaint is sulfur contamination and wear of the fuel level sensor contacts inside the tank module, causing the gauge to read empty, full, or fluctuate unpredictably. Owners often see a low-fuel warning with plenty of fuel in the tank or watch the gauge drop suddenly while driving. GM issued service information and special coverage on many trucks for this exact condition.

This issue also affects: Chevrolet Colorado, Chevrolet Silverado 1500, GMC Sierra 3500HD

Common Symptoms

fuel gauge reads empty when tank is full
fuel gauge fluctuates while driving
low fuel light comes on incorrectly
distance-to-empty inaccurate
intermittent gauge operation

How to Fix

Confirm the issue by comparing scan-tool fuel level data and observing whether the sender reading jumps erratically. The usual repair is replacement of the fuel level sensor or, more commonly, the entire fuel pump module assembly because of labor overlap and the age of the pump. Connector condition and ground integrity should also be checked during service.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipBecause tank removal labor is the same, many owners replace the complete pump module instead of only the sender on higher-mileage trucks.
TipAvoid repeatedly running the tank very low; owners and technicians often report sender wear and pump overheating are worse when the module is not submerged.
UpgradeA complete module replacement is the most common long-term fix for erratic fuel gauge readings on these trucks. (Delphi Fuel Pump Module Assembly)
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UpgradeAn OEM-style replacement is commonly chosen when owners want factory fit and sender calibration. (ACDelco Fuel Level Sensor / Pump Module Assembly)
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Typical repair cost:$450 - $1,100

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On the 2019-2023 GMC Sierra 1500, the infotainment system experiences intermittent complete audio loss affecting stereo, turn signals, and safety warning sounds. The audio system may randomly go to maximum volume and cannot be controlled. OTA software updates have caused additional issues including erratic blinker tones, constant reboots while driving, and frozen camera screens.

This issue also affects: Chevrolet Colorado, Chevrolet Silverado 1500

Common Symptoms

Complete loss of all interior audio for hours
Radio randomly goes to maximum volume
Turn signal and safety warning sounds stop working
Infotainment screen freezes or reboots while driving
Backup camera display freezes or goes black
Bluetooth connectivity issues

How to Fix

Perform hard reset by disconnecting battery for 30 minutes. Software update at dealership. Replace infotainment head unit/radio module. Replace audio amplifier for Bose systems.

What Owners Are Using

Parts and tips from 456+ owners who fixed this issue

TipGM TSB 21-NA-099 addresses 2019-2021 Sierra 1500 infotainment audio loss. First step is dealer reprogramming of the ICS (Infotainment Control System) module. Ensure dealer installs the latest software version - multiple revisions have been released. Many owners report audio restored after a single reprogram. If audio loss recurs within 500 miles, request full head unit replacement under warranty.
TipIf your 2019-2023 Sierra loses all audio including turn signal chimes and safety alerts, perform a hard reset: hold the power/volume knob for 10 seconds until the screen goes dark, then release. If that fails, do a full battery disconnect (negative terminal, 30 minutes) to reset all modules. This resolves roughly 40% of audio loss cases without a dealer visit per GM-Trucks.com member reports.
NoteLoss of turn signal chimes and collision warning tones is a safety hazard. NHTSA has received 300+ complaints on this issue for 2019-2021 Sierra 1500. If audio loss includes safety warning sounds, document each occurrence with date/mileage and file an NHTSA complaint at safercar.gov. Dealers are more likely to escalate to module replacement when NHTSA complaints exist. For Bose-equipped trucks, the Bose amplifier (GM 84347099) is a known secondary failure point when head unit replacement alone doesn't fix the issue. (GM #84347099)
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UpgradeHigh-performance AGM battery with excellent cold cranking amps and deep cycle capability (Optima RedTop AGM Battery)
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UpgradeOEM-quality replacement battery with reliable performance (ACDelco Professional AGM Battery)
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UpgradeAutomatic battery maintainer to prevent parasitic drain issues during storage (Battery Tender Junior 12V Battery Charger Maintainer)
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UpgradeProfessional OBD-II diagnostic scanner for reading infotainment and body module codes (BlueDriver Bluetooth Pro OBD2 Scan Tool)
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UpgradeAutomotive relay replacement set for common relay failures (Bosch Automotive Relay 5-Pin 12V)
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UpgradeDigital multimeter for diagnosing fuse, relay, and module electrical faults (Innova Digital Multimeter)
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UpgradeOEM-quality replacement sensor for accurate readings and proper system function (Bosch Replacement Sensor)
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Typical repair cost:$0 - $2,500

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On the 2003-2007 GMC Sierra 1500, 2003-2007 Classic-era Sierra trucks are well known for instrument cluster gauge failures caused by defective stepper motors and, in some cases, backlighting issues. Speedometer, tachometer, oil pressure, fuel, voltage, and coolant gauges can stick, read wildly high or low, or stop moving entirely. The problem became widespread enough that GM issued a special coverage adjustment on many trucks and SUVs using the same cluster design.

This issue also affects: Chevrolet Silverado 1500, Ford Ranger, GMC Yukon XL

Common Symptoms

speedometer reads 0 or pegs past 120 mph
fuel gauge inaccurate
oil pressure gauge stuck high or low
tachometer inoperative
intermittent or failed cluster backlighting
warning chimes with incorrect gauge readings

How to Fix

Verify actual vehicle data with a scan tool or GPS speed app to confirm the cluster is inaccurate rather than the sending unit. Repair is typically cluster removal and professional rebuild with updated stepper motors and bulbs, or replacement with a remanufactured unit programmed for the vehicle. If only one gauge is wrong, the whole cluster is still usually rebuilt because the remaining motors often fail later.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipCompare cluster readings to live scan data before replacing sending units; many owners chase false oil pressure or fuel-level problems that are actually cluster-related.
TipUse a rebuilder that installs updated X27.168 stepper motors and tests all gauges, not just the failed one.
UpgradeUpdated stepper motors are the standard fix when rebuilding these GMT800 clusters. (Switec X27.168 Stepper Motor)
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UpgradeMany owners choose a remanufactured cluster to avoid soldering and to get a warranty-backed repair. (Dorman Remanufactured Instrument Cluster)
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Typical repair cost:$250 - $700

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On the 2007-2013 GMC Sierra 1500, gMT900 Sierra trucks are well known for failing door lock actuators, often starting with one door that unlocks weakly or only works intermittently before additional doors fail. Owners report the key fob cycling the locks while one or more doors remain stuck, requiring manual operation from inside. The issue is heavily documented across GM full-size truck forums and complaint records.

Common Symptoms

door will not lock or unlock with key fob
weak buzzing from inside door
intermittent power lock operation
one or more doors stuck locked
manual lock works but power lock does not

How to Fix

Diagnosis involves confirming power and ground at the latch/actuator assembly and ruling out broken door-jamb wiring or BCM command issues. The usual fix is replacement of the failed actuator or latch-actuator assembly in the affected door, followed by checking all doors because multiple actuators often fail within a similar time period.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipUse OEM or quality aftermarket latch/actuator assemblies; very cheap actuators often fail quickly or operate weakly.
TipBefore replacing parts, check the rubber door-jamb boot for broken wires if the door has multiple electrical issues.

Typical repair cost:$180 - $500

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On the 2014-2018 GMC Sierra 1500, the upper intermediate steering shaft develops excessive wear causing a pronounced clunking noise when turning the steering wheel or going over bumps. The issue is caused by wear in the shaft's universal joints or the plastic bushing near the firewall. GM has redesigned the part multiple times but the problem persists.

This issue also affects: Chevrolet Impala

Common Symptoms

Clunking noise when turning steering wheel at low speeds
Clunk or rattle when going over bumps
Play or looseness felt in steering wheel
Creaking noise from steering column area

How to Fix

Replace upper intermediate steering shaft with redesigned part (GM part number 84105918 or later). Lubricate shaft U-joints (temporary fix). Replace plastic bushing near firewall. DIY hose clamp fix to tighten shaft above plastic bearing.

What Owners Are Using

Parts and tips from 678+ owners who fixed this issue

TipThe $5 hose clamp fix works for many - place 2.5 inch hose clamp on metal shaft above white plastic bushing under dash
UpgradePolyurethane bushing kit for longer life and tighter handling than OEM rubber (Energy Suspension Bushing Kit)
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UpgradeSway bar end links to eliminate clunking over bumps (Moog Sway Bar Link Kit)
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Typical repair cost:$50 - $600

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On the 1999-2013 GMC Sierra 1500, front wheel hub bearing assemblies on Sierra 1500 trucks commonly wear out, especially on 4WD models and trucks used with larger tires or in rough conditions. Owners report humming or growling that changes with speed, looseness in the front wheel, and in some cases ABS warnings or low-speed ABS activation because the wheel speed sensor is integrated into the hub. This is a frequent repair item across both GMT800 and GMT900 generations.

This issue also affects: Chrysler 300, Ford Transit Connect, GMC Yukon XL

Common Symptoms

humming or growling from front end
noise increases with vehicle speed
wheel play or looseness
ABS light on
traction control warning
low-speed ABS activation

How to Fix

Diagnosis involves checking for wheel play with the tire off the ground, listening for bearing noise during road tests, and comparing wheel speed sensor data if ABS symptoms are present. Repair is replacement of the affected hub assembly, and many owners replace both sides if mileage is high. Corrosion at the sensor mounting surfaces and wiring damage should also be addressed to prevent repeat ABS issues.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipIf one front hub is noisy and the other has similar mileage, inspect both sides closely; many owners end up replacing the second hub soon after.
TipAfter hub replacement, verify the ABS harness routing is clipped correctly so it does not rub through on the tire or suspension.
UpgradeOwners often prefer premium hub assemblies because cheap units can be noisy or loose again quickly. (Timken Wheel Bearing and Hub Assembly)
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UpgradeA complete hub with integrated sensor is the standard repair for bearing noise and wheel speed sensor faults. (MOOG Front Wheel Hub Assembly)
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Typical repair cost:$300 - $900

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On the 2000-2013 GMC Sierra 1500, sierra owners across both GMT800 and GMT900 generations frequently report small electric HVAC actuators stripping internal gears or losing calibration. The result is a repetitive clicking or tapping noise from the dash, air stuck on defrost or floor, or one side blowing hot while the other blows cold. This is one of the most common non-drivetrain complaints on these trucks and is heavily documented in owner forums and repair databases.

This issue also affects: Chevrolet Equinox, GMC Yukon XL, Cadillac DeVille

Common Symptoms

clicking behind dash
air only blows from defrost
temperature stuck hot or cold
driver and passenger temperatures do not match
mode changes do not respond
recirculation door inoperative

How to Fix

Diagnosis is done by commanding HVAC modes and temperatures while listening for actuator chatter and verifying door movement with a scan tool or visual inspection where accessible. Repair involves replacing the failed mode, blend, or recirculation actuator and then performing HVAC recalibration by fuse pull or scan-tool procedure depending on year and system configuration.

What Owners Are Using

Parts and tips from 0+ owners who fixed this issue

TipIdentify which actuator failed before buying parts; trucks may have separate left, right, mode, and recirculation actuators depending on options.
TipAfter replacement, perform the HVAC recalibration procedure or the new actuator may not index correctly.

Typical repair cost:$150 - $700

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On the 2007-2013 GMC Sierra 1500, owners of 2007-2013 Sierra 1500 trucks commonly report the upper dash cracking near the passenger airbag area and around defrost vents, especially in hot climates. While primarily a cosmetic and rattling issue, some owners also complain that broken plastic edges and loose pieces worsen over time. The problem is widely discussed in owner communities for GMT900 GM trucks and appears repeatedly in complaint databases.

Common Symptoms

cracked dashboard
rattles from dash area
broken plastic near passenger airbag
sun-damaged interior trim
loose dash pieces

How to Fix

Inspect for cracks around the passenger-side airbag opening, center speaker area, and defrost vent corners. Repair options include replacing the dash pad, installing a molded dash cap, or using plastic repair methods for minor cracks; replacement is the most durable but also the most labor-intensive and expensive option.

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TipMany owners use a molded dash cap as a lower-cost fix when full dash replacement is not worth the labor.
TipUse a windshield sunshade and UV protectant to slow further cracking on replacement panels.

Typical repair cost:$120 - $1,200

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567 owners

On the 2014-2020 GMC Sierra 1500, the A/C compressor is prone to premature failure due to faulty welds, insufficient lubrication, or internal mechanical failure. When the compressor fails catastrophically, metal debris contaminates the entire A/C system requiring replacement of multiple components. The A/C clutch can also fail independently, preventing compressor engagement.

This issue also affects: Fiat 500

Common Symptoms

A/C blows warm air
A/C works intermittently
Unusual noise when A/C is engaged
A/C clutch not engaging
Visible refrigerant leak
A/C cools then gradually warms up

How to Fix

Replace A/C compressor with revised GM part. Flush A/C system and replace expansion valve, receiver/dryer, and condenser if compressor failed catastrophically. Replace A/C clutch assembly. Repair refrigerant leaks and recharge system.

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Parts and tips from 567+ owners who fixed this issue

UpgradeACDelco 15-22344 is the OEM replacement AC compressor for 2014-2018 Sierra 1500 with 5.3L/6.2L V8. For 2019-2025 models, use ACDelco 15-23063. When replacing, also replace the orifice tube/expansion valve and receiver-drier - metal debris from a failed compressor circulates and destroys new compressors if the system isn't fully flushed. Use only approved AC system flush solvent and R-134a (2014-2020) or R-1234yf (2021-2025). (ACDelco #15-22344)
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UpgradeTSB 17-NA-087 covers 2014-2018 Sierra 1500 AC compressor clutch failures causing squealing and no-cool conditions. Bulletin allows clutch plate replacement separately (GM 84074482) without full compressor replacement if the compressor body is not internally damaged. Have dealer test compressor high/low side pressures and inspect for metal debris before approving full replacement. Clutch-only fix costs $150-250 vs $800-1,200 for full compressor. (GM #84074482)
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NoteSierra 1500 compressors on 5.3L models often fail due to the variable displacement compressor (VDC) control valve seizing - the piston inside the compressor over-extends and destroys the reed valves. If AC suddenly stops cooling with a loud bang or clunk, stop running AC immediately - a seized compressor will shred internal components into the refrigerant lines within minutes of continued operation. Full system flush and receiver-drier replacement are mandatory after any catastrophic compressor failure.

Typical repair cost:$500 - $2,500

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Frequently Asked Questions

What are the most common GMC Sierra 1500 problems?

According to Au7o's analysis of 4,765+ owner reports, the 1999-2023 GMC Sierra 1500 has 18 documented issues. The most frequently reported are: AFM/DFM Lifter Collapse and Failure, 8-Speed/10-Speed Transmission Torque Converter Shudder, Electronic Brake Control Module Failure. Of these, 7 are rated critical and should be addressed promptly.

Is the GMC Sierra 1500 reliable?

The 1999-2023 GMC Sierra 1500 has 18 known issues documented across 4,765+ owner reports. 7 issues are rated critical: AFM/DFM Lifter Collapse and Failure and 8-Speed/10-Speed Transmission Torque Converter Shudder and Electronic Brake Control Module Failure and Transfer Case Unintended Shift to Neutral and Rusting Brake Lines Leading to Fluid Loss and Sudden Brake Failure and Fuel Pump Module Failure Causing No-Start or Stalling and 4L60-E / 4L65-E Sun Shell Failure Causing Loss of Reverse and 2nd/4th Gear. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common GMC Sierra 1500 problems?

Repair costs for known GMC Sierra 1500 issues range from $0 to $8,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, AFM/DFM Lifter Collapse and Failure, typically costs $4,000-$8,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What year GMC Sierra 1500 is the most reliable?

Reliability varies across model years of the GMC Sierra 1500. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 1999-2023 GMC Sierra 1500 with 18 documented issues documented across 4,765+ owner reports.

All 18 Known Issues

When Issues Typically Appear

2015-2023 GMC Sierra 1500: 8-Speed/10-Speed Transmission Torque Converter Shudder#

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2014-2015 GMC Sierra 1500: Transfer Case Unintended Shift to Neutral#

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2000-2007 GMC Sierra 1500: 4L60-E / 4L65-E Sun Shell Failure Causing Loss of Reverse and 2nd/4th Gear#

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2014-2023 GMC Sierra 1500: Electronic Brake Control Module Failure#

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1999-2007 GMC Sierra 1500: Rusting Brake Lines Leading to Fluid Loss and Sudden Brake Failure#

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2014-2023 GMC Sierra 1500: AFM/DFM Lifter Collapse and Failure#

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2014-2023 GMC Sierra 1500: Direct Injection Carbon Buildup on Intake Valves#

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2000-2006 GMC Sierra 1500: Knock Sensor Water Intrusion Under Intake Causing Check Engine Light and Reduced Performance#

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2000-2007 GMC Sierra 1500: Fuel Pump Module Failure Causing No-Start or Stalling#

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2003-2007 GMC Sierra 1500: Fuel Level Sensor Failure Causing Erratic or Inoperative Gas Gauge#

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2019-2023 GMC Sierra 1500: Infotainment System Audio Loss and Malfunction#

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2003-2007 GMC Sierra 1500: Stepper Motor Instrument Cluster Failure Causing Inaccurate Gauges#

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2007-2013 GMC Sierra 1500: Power Door Lock Actuator Failure Causing Intermittent or Inoperative Locking#

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2014-2018 GMC Sierra 1500: Intermediate Steering Shaft Clunk#

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1999-2013 GMC Sierra 1500: Front Hub Bearing Assembly Failure Causing ABS Activation, Noise, and Wheel Play#

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2000-2013 GMC Sierra 1500: Blend Door / HVAC Actuator Failure Causing Clicking Behind Dash and Incorrect Air Temperature or Mode#

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