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GMC · Known Issues

2020 GMC Acadia Problems: 9 Known Issues

2020 model year · 560+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 560+ owner reports, the 2020 GMC Acadia has 9 documented known issues, with 4 rated critical. The most serious are Start/Stop Transmission Accumulator Missing Bolts - Fluid Leak, Loss of Propulsion and Fire Risk (Recall 20V668 / N202313440), 3.6L V6 Internal Water Pump Failure and Coolant Leak, Continental Tires Cured Too Long — Sidewall Break or Tread Loss (Recall 21V115000) and Fuel Pump Mixing-Tube Burr Causing Engine Stall at Low Fuel (Recall 20V446 / GM N202314760). The most commonly reported issue is 9T65 9-Speed Transmission Harsh Shifts and Hesitation with 560 owner reports. Across all issues with published estimates, repair costs range from $120 to $3,500. DIY maintenance guides at au7o.io.

In This Article

  • Acadia Safety/Recalls3
  • Acadia Transmission2
  • Acadia Engine1
  • Acadia Fuel System1
  • Acadia Electrical1
  • Acadia HVAC1
  • Recalls9
  • FAQ
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In This Article

  • Safety/Recalls3
  • Transmission2
  • Engine1
  • Fuel System1
  • Electrical1
  • HVAC1
  • Recalls9
  • FAQ

All 9 Known Issues

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On the 2019-2020 GMC Acadia, gMC Acadias from the 2019 and 2020 model years are among the vehicles GM recalled over Continental tires that were cured for too long when they were manufactured. The defect is in the tire itself rather than anything on the Acadia. An over-cured tire can develop a break in the sidewall, which lets the air out suddenly, or it can suffer a belt edge separation and shed its tread. GM's notice states that either condition can cause a loss of vehicle control and increase the risk of a crash. The campaign also reached Continental tires sold to the aftermarket for 2018-2021 vehicles, so an Acadia riding on replacement Continentals from that period is worth checking as well.

Common Symptoms

  • Sudden deflation of a tire
  • Sidewall break
  • Tread or belt coming off the tire
  • Loss of vehicle control

How to Fix

Take the Acadia to a GMC dealer — the inspection and any tire replacement are free. Dealers check the tires against the affected production data and replace what qualifies. Notification to owners started March 22, 2021. To confirm your VIN has no open recall left on it, use nhtsa.gov/recalls; GMC customer service is 1-888-988-7267 and GM's number for this campaign is N212329050.

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High ConfidenceVerifiedReviewed Aug 2026

On the 2020-2021 GMC Acadia, nHTSA campaign 22V709 covers certain 2020-2021 GMC Acadia vehicles with optional Surround Vision. Improperly crimped rearview-camera coaxial connectors can cause the camera image to fail or work intermittently.

Common Symptoms

  • Rearview-camera image may fail or become intermittent

How to Fix

Check the VIN and equipment with GMC. Dealers replace the rearview-camera coaxial cables free of charge under GM campaign N222378380.

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On the 2020-2021 GMC Acadia, gMC recalled 2020-2021 Acadia SUVs built with the optional Surround Vision camera package because the coaxial cable connectors feeding the rearview camera may have been crimped improperly at assembly. On an affected Acadia, that bad crimp can interrupt the video signal, so the rearview camera either stops working altogether or cuts in and out. NHTSA's consequence statement is straightforward: an inoperative rearview camera reduces the driver's view behind the vehicle when backing up, which raises the risk of a crash. Only Acadias equipped with Surround Vision fall inside this campaign; the recall covers 95,231 vehicles in total across every model included in it (Acadia plus the Cadillac XT5 and XT6), and that figure is campaign-wide, not an Acadia-specific count. GM's internal number for the recall is N222378380, and owner notification letters went out January 18, 2023.

Common Symptoms

  • Rearview camera image does not appear when shifting into reverse
  • Rear camera view works sometimes and drops out other times
  • Loss of the rear view within the Surround Vision display

How to Fix

The repair is free at any GMC dealer: the dealer replaces the rearview camera coaxial cables that were improperly crimped. Enter your Acadia's VIN at nhtsa.gov/recalls to confirm whether your specific vehicle is included and whether the work has already been performed. If you need help, GMC customer service can be reached at 1-800-462-8782; reference recall N222378380 (NHTSA 22V709000).

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On the 2019-2020 GMC Acadia, nHTSA campaign 20V668 covers certain 2019-2020 GMC Acadia vehicles. The start/stop transmission-accumulator endcap may be missing bolts, which can cause an oil leak and loss of transmission function and may increase fire risk.

This issue also affects: Chevrolet Spark, Chevrolet Traverse, Chevrolet Trailblazer

Common Symptoms

  • Possible transmission-fluid leak
  • Possible loss of transmission function

How to Fix

Check the VIN with GMC. Dealers inspect the start/stop transmission accumulator and replace it when bolts are missing free of charge under GM campaign N202313440.

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Community reported
560 owners

On the 2017-2025 GMC Acadia, the second-generation Acadia (2017+) uses the GM 9T65 9-speed automatic transmission which shares known issues with the Chevrolet Traverse and Blazer. Common complaints include harsh 1-2 upshifts, hesitation between 5-15 mph, lurching on light throttle in stop-and-go traffic, and the transmission hunting between gears on hills. GM has released multiple TCM calibration updates. The transmission is extremely sensitive to fluid condition — extended intervals with aging Dexron HP fluid contribute significantly to shift quality degradation.

This issue also affects: Cadillac XT5, Cadillac XT6, Chevrolet Camaro

Common Symptoms

  • Harsh or jerky 1-2 upshift between 5-15 mph
  • Hesitation when pulling away from a stop
  • Transmission hunting between gears on slight grades
  • Vibration or shudder during light acceleration
  • Delayed engagement from Park to Drive
  • Slip or flare on 2-3 shift under load

How to Fix

TCM recalibration with latest software (multiple revisions released). Full transmission fluid exchange with Dexron HP (ACDelco/GM 19354121) every 45,000 miles. Valve body and solenoid pack replacement (OEM 24043134) if software updates fail. Allow 500+ miles for relearn after any TCM reset.

Typical repair cost:$0 - $3,500

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Based on 560 owner reports

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High Confidence560 owner reportsLast reported by owners Feb 2026Reviewed Feb 2026

On the 2007-2023 GMC Acadia, gM customer-satisfaction bulletin 13079 covers certain 2009-2013 GMC Acadia vehicles with 3.6L High Feature V6 engines (RPO LY7 or LLT) that may experience leakage from the water-pump shaft seal, often after operation with low coolant.

This issue also affects: Cadillac XT5, Cadillac XT6, Chevrolet Camaro

Common Symptoms

  • Coolant leak from the water-pump shaft seal

How to Fix

Check the VIN and current eligibility with GMC. Bulletin 13079 directs dealers to verify and correct coolant level with the proper DEX-COOL mixture; it does not establish the frozen claim that the pump is internal or must be combined with timing-chain work.

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On the 2020 GMC Acadia, nHTSA campaign 20V639 covers certain 2020 GMC Acadia vehicles. A plastic burr left in the fuel pump jet nozzle can block the nozzle and reduce fuel delivery to the engine, which can cause an engine stall.

This issue also affects: Cadillac XT4, Cadillac XT5, Cadillac XT6

Common Symptoms

  • Insufficient fuel supply
  • Possible engine stall

How to Fix

Check the VIN with GMC. Dealers replace the fuel-pump module free of charge under GM campaign N202314760.

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On the 2017-2021 GMC Acadia, gM bulletin 22-NA-033 covers 2019 GMC Acadia vehicles equipped with IOS, IOU or IOT radios that can reset or reboot and display the GMC splash animation. Bluetooth-call or touch-input symptoms can occur immediately before the reboot.

This issue also affects: Chevrolet Equinox, GMC Sierra 1500, Chevrolet Silverado 1500

Common Symptoms

  • Radio resets or reboots
  • GMC splash animation may appear

How to Fix

Have a GMC retailer confirm the radio software version. The bulletin directs a USB radio-software update to version V809 when the installed version is V808 or earlier.

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On the 2007-2021 GMC Acadia, the dual-zone HVAC case uses several small plastic-geared blend/mode door actuators. The gear teeth strip or the door binds, so the actuator hunts for its calibration position and produces a repetitive clicking or ticking from behind the dash or glovebox. The classic complaint is full heat on the driver's side and ice-cold air on the passenger's side (or the reverse), often with the click audible whenever the temperature setting is changed or the ignition is cycled. It is one of the most common non-powertrain complaints on the Acadia across both generations because every part of the actuator drivetrain is plastic.

This issue also affects: Chevrolet Equinox, Chevrolet Malibu, GMC Sierra 1500

Common Symptoms

  • Repetitive clicking or ticking behind dash or glovebox
  • Heat on one side, cold air on the other
  • Temperature does not change when adjusted
  • Air comes from wrong vents
  • Clicking stops when HVAC is off

How to Fix

Identify the failed actuator by moving the temperature setpoint and feeling/listening at each actuator — the failed one clicks while the good one is smooth. The passenger blend actuator is reachable from behind the glovebox and is held by three T20 Torx screws; some mode actuators require dropping more of the lower dash. Replace the actuator, then start the vehicle and let the HVAC control module run its self-calibration for roughly 40 seconds without touching the controls. Inspect the blend door shaft for binding or a broken door before installing a new actuator, or the new one will strip too.

Typical repair cost:$120 - $450

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Low ConfidenceVerifiedReviewed Aug 2026
NHTSA Recalls9 recalls

FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

General Motors, LLC. (GM) is recalling certain 2021 Cadillac XT5, XT6, and GMC Acadia vehicles. The fuel supply lines may be improperly attached and seated.

Campaign #21V42200003/06/2021

BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

General Motors, LLC (GM) is recalling certain 2020-2021 Cadillac XT5, XT6, and GMC Acadia vehicles equipped with the optional Surround Vision feature. The rearview camera coaxial cable connectors may have been crimped improperly, causing the rearview camera to fail or function intermittently.

Campaign #22V70900022/09/2022

AIR BAGS

General Motors, LLC. (GM) is recalling certain 2022 GMC Acadia vehicles. The sensing diagnostic module (SDM) may have been left in "manufacturing mode" and not activated at the assembly plant prior to shipment. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."

Campaign #21V702000
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Frequently Asked Questions

What are the most common GMC Acadia problems?

According to Au7o's analysis of 560+ owner reports, the 2020 GMC Acadia has 9 documented issues. The most frequently reported are: Start/Stop Transmission Accumulator Missing Bolts - Fluid Leak, Loss of Propulsion and Fire Risk (Recall 20V668 / N202313440), 3.6L V6 Internal Water Pump Failure and Coolant Leak, Continental Tires Cured Too Long — Sidewall Break or Tread Loss (Recall 21V115000). Of these, 4 are rated critical and should be addressed promptly.

Is the GMC Acadia reliable?

The 2020 GMC Acadia has 9 known issues documented across 560+ owner reports. 4 issues are rated critical: Start/Stop Transmission Accumulator Missing Bolts - Fluid Leak, Loss of Propulsion and Fire Risk (Recall 20V668 / N202313440) and 3.6L V6 Internal Water Pump Failure and Coolant Leak and Continental Tires Cured Too Long — Sidewall Break or Tread Loss (Recall 21V115000) and Fuel Pump Mixing-Tube Burr Causing Engine Stall at Low Fuel (Recall 20V446 / GM N202314760). 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 Acadia problems?

Repair costs for known GMC Acadia issues range from $0 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2019-2020 GMC Acadia Start/Stop Transmission Accumulator Missing Bolts - Fluid Leak, Loss of Propulsion and Fire Risk (Recall 20V668 / N202313440)?

NHTSA campaign 20V668 covers certain 2019-2020 GMC Acadia vehicles. The start/stop transmission-accumulator endcap may be missing bolts, which can cause an oil leak and loss of transmission function and may increase fire risk. Severity: high.

What is the 2007-2023 GMC Acadia 3.6L V6 Internal Water Pump Failure and Coolant Leak?

GM customer-satisfaction bulletin 13079 covers certain 2009-2013 GMC Acadia vehicles with 3.6L High Feature V6 engines (RPO LY7 or LLT) that may experience leakage from the water-pump shaft seal, often after operation with low coolant. Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data sourced from 560+ owner reports, NHTSA recalls, TSBs, and automotive forums.

10/09/2021

SUSPENSION:REAR

General Motors, LLC (GM) is recalling certain 2022 Cadillac XT5, XT6, and GMC Acadia vehicles. The left-rear suspension toe link may have been tightened improperly, which could result in a loose or separated toe link.

Campaign #22V42700016/06/2022

FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY

General Motors, LLC (GM) is recalling certain 2022 Cadillac XT5, XT6, and GMC Acadia All-Wheel Drive (AWD) vehicles. The fuel tank rollover valve may not provide a proper seal in the event of a rollover crash.

Campaign #22V44600023/06/2022

+ 4 more recalls. Check all on NHTSA.gov

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

What is the 2019-2020 GMC Acadia Continental Tires Cured Too Long — Sidewall Break or Tread Loss (Recall 21V115000)?

GMC Acadias from the 2019 and 2020 model years are among the vehicles GM recalled over Continental tires that were cured for too long when they were manufactured. The defect is in the tire itself rather than anything on the Acadia. An over-cured tire can develop a break in the si… Severity: high.

What is the 2020 GMC Acadia Fuel Pump Mixing-Tube Burr Causing Engine Stall at Low Fuel (Recall 20V446 / GM N202314760)?

NHTSA campaign 20V639 covers certain 2020 GMC Acadia vehicles. A plastic burr left in the fuel pump jet nozzle can block the nozzle and reduce fuel delivery to the engine, which can cause an engine stall. Severity: high.

What is the 2017-2025 GMC Acadia 9T65 9-Speed Transmission Harsh Shifts and Hesitation?

The second-generation Acadia (2017+) uses the GM 9T65 9-speed automatic transmission which shares known issues with the Chevrolet Traverse and Blazer. Common complaints include harsh 1-2 upshifts, hesitation between 5-15 mph, lurching on light throttle in stop-and-go traffic, and… Repairs typically run $0-$3,500. Severity: medium.

What is the 2017-2021 GMC Acadia Infotainment System Lockup, Black Screen and Random Reboots (2nd-Gen IO/IOR Head Unit)?

GM bulletin 22-NA-033 covers 2019 GMC Acadia vehicles equipped with IOS, IOU or IOT radios that can reset or reboot and display the GMC splash animation. Bluetooth-call or touch-input symptoms can occur immediately before the reboot. Severity: medium.

What is the 2020-2021 GMC Acadia Surround Vision Rearview Camera Coaxial Cable Crimp Failure - Black/Lost Backup Image (Recall 22V709 / N222378380)?

NHTSA campaign 22V709 covers certain 2020-2021 GMC Acadia vehicles with optional Surround Vision. Improperly crimped rearview-camera coaxial connectors can cause the camera image to fail or work intermittently. Severity: medium.

What is the 2020-2021 GMC Acadia Surround Vision Rearview Camera Failure From Improperly Crimped Coaxial Cable (Recall 22V709000)?

GMC recalled 2020-2021 Acadia SUVs built with the optional Surround Vision camera package because the coaxial cable connectors feeding the rearview camera may have been crimped improperly at assembly. On an affected Acadia, that bad crimp can interrupt the video signal, so the re… Severity: medium.

What is the 2007-2021 GMC Acadia HVAC Blend Door Actuator Gear Stripping — Clicking Dash and Cold Air on One Side Only?

The dual-zone HVAC case uses several small plastic-geared blend/mode door actuators. The gear teeth strip or the door binds, so the actuator hunts for its calibration position and produces a repetitive clicking or ticking from behind the dash or glovebox. The classic complaint is… Repairs typically run $120-$450. Severity: low.