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Cadillac · Known Issues

2021 Cadillac XT4 Problems: 8 Known Issues

2021 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Cadillac XT4 has 8 documented known issues, with 1 rated critical. The most serious is Fuel Pump Control Module Failure Causes Sudden Stall and Crank-No-Start (P203F) ($600-$1,500 repair). Across all issues with published estimates, repair costs range from $50 to $3,500. DIY maintenance guides at au7o.io.

In This Article

  • XT4 Fuel System1
  • XT4 Engine3
  • XT4 Electrical1
  • XT4 Transmission1
  • XT4 Drivetrain1
  • XT4 Brakes1
  • Recalls4
  • FAQ
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In This Article

  • Fuel System1
  • Engine3
  • Electrical1
  • Transmission1
  • Drivetrain1
  • Brakes1
  • Recalls4
  • FAQ

All 8 Known Issues

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ALL YEARS2025202420232022202120202019

On the 2021-2025 Cadillac XT4 LSY 2.0T, the fuel pump power control module (FPCM), mounted under the vehicle near the fuel tank on 9-speed 2.0T LSY XT4s, fails internally and stops commanding the in-tank pump. The failure is typically abrupt with no preceding driveability symptoms: the engine cuts out at speed or refuses to restart after a normal shutdown, and the vehicle cranks but will not fire. Owners report repeat failures on the same vehicle. GM opened a fuel pump control module recall (campaign N252516900) covering a subset of build ranges, but NHTSA complaints show owners with out-of-scope VINs experiencing identical failures, and the pattern spans 2021 through 2025 build years.

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

Common Symptoms

  • Engine suddenly shuts off while driving
  • Cranks but will not start
  • Complete loss of motive power with no warning lights
  • Vehicle stalls at idle or at a stoplight and must be towed
  • Repeat failure after previous fuel pump repair

How to Fix

Diagnose with a scan tool for P203F (fuel pump control module performance) and related low fuel-rail-pressure codes; confirm no pump command / no pump power with the module commanded on. The repair is replacement of the fuel pump power control module (and in some cases the in-tank pump module assembly), followed by programming. Check the vehicle's VIN against GM recall N252516900 first, as covered vehicles get the module replaced at no charge. Because failure is sudden and total, do not defer the repair once the code has been stored.

Typical repair cost:$600 - $1,500

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2019-2022 Cadillac XT4 LSY 2.0T, on the 2.0L LSY turbo, the camshaft carrier assembly bolts between the cylinder head and the cam cover, and its sealing surface (along with the intake manifold gasket area) develops an external oil leak, usually discovered during a routine oil-change multipoint inspection between roughly 20,000 and 55,000 miles. Oil runs down the passenger side of the block. This is not oil consumption through the PCV path - it is a discrete external seal failure. Multiple owners report dealers describing it as a known XT4 pattern and quoting large repairs because access requires substantial teardown; some quotes involve pulling the engine or extensive top-end disassembly, and several owners needed multiple return visits before the leak was actually stopped.

Common Symptoms

  • Oil running down the passenger side of the engine block
  • Burning oil smell after driving
  • Oil spots on the driveway
  • Low oil level between changes
  • Leak noted on dealer multipoint inspection video

How to Fix

Clean and dye-trace to separate the camshaft carrier seal from the cam cover gasket, intake manifold gasket, and turbo oil feed/return lines before authorizing work - misdiagnosis here is common and expensive. Correct repair is removal of the cam cover and camshaft carrier, replacement of the carrier-to-head seal (RTV/anaerobic sealing surface per GM procedure) and cam cover gasket, with all mating surfaces fully cleaned and torqued in sequence. Replace the intake manifold gasket at the same time if it shows seepage. Verify GM powertrain warranty coverage before paying out of pocket.

Typical repair cost:$1,200 - $3,500

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Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026

On the 2019-2025 Cadillac XT4 2.0T LSY, the XT4 uses the 2.0T LSY engine which is an evolution of the LTG found in the ATS/CTS. The LSY has improved reliability but shares some issues including PCV system problems and turbo coolant line leaks. The turbo coolant lines can develop leaks at the connections, causing coolant loss and potential turbo damage from overheating. The PCV valve/cover can fail causing oil consumption. These issues typically appear between 40,000-80,000 miles.

This issue also affects: Buick Cascada, Buick Encore GX, Buick Encore

Common Symptoms

  • Coolant level dropping slowly
  • Sweet smell from engine bay (coolant leak)
  • Check engine light with misfire or lean codes
  • Excessive oil consumption
  • Turbo whistle changes or louder than normal

How to Fix

Inspect turbo coolant lines and connections for leaks - replace lines if seeping. PCV system is integrated into valve cover - replace valve cover assembly if PCV fails. GM has released updated coolant line designs for some affected vehicles. Regular maintenance with full synthetic oil at 5,000-mile intervals is important for turbo health.

Typical repair cost:$200 - $1,500

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Community Reported
Medium ConfidenceLast reported by owners Feb 2026Reviewed Feb 2026

On the 2019-2025 Cadillac XT4 2.0L Turbo, the 2.0L turbocharged engine in the XT4 consumes oil at a higher-than-expected rate, with some owners reporting a quart consumed every 2,000-3,000 miles. The issue is related to the piston ring design and turbocharger oil scavenge system. GM has not issued a formal service bulletin addressing the root cause.

This issue also affects: Buick Envision, Chevrolet Equinox, GMC Terrain

Common Symptoms

  • Low oil level between changes
  • Low oil pressure warning
  • Oil smell from exhaust
  • Blue haze on hard acceleration

How to Fix

Monitor oil level between changes and top off as needed. Use only Dexos1 Gen3 certified 0W-20 synthetic oil. Have the PCV system inspected for proper function. If consumption exceeds 1 quart per 2,000 miles, request a GM oil consumption test from the dealer. Document consumption for warranty purposes.

Typical repair cost:$50 - $2,000

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Community Reported
Medium Confidence

On the 2019-2021 Cadillac XT4, the front DRL and turn-signal LED module in the XT4 headlamp assembly runs hot and fails. Owners report the light first going dim, then dead, and at least one teardown found the modules had been assembled with no heatsink thermal compound between the LED board and its heat spreader, which is exactly the condition that cooks an LED driver. Failures show up on one or both sides, and one owner reported the signal housing physically burned/melted, which failed a state safety inspection. Because the DRL and front turn signal share the module, the vehicle loses both its daytime conspicuity and its front turn indication on that corner.

Common Symptoms

  • Daytime running light dim on one side
  • DRL completely out on driver or passenger side
  • Front turn signal inoperative or hyper-flashing
  • Melted or discolored signal housing
  • Failed state safety inspection for lighting

How to Fix

Confirm the failure is the LED module and not the body control module output by checking for correct supply and PWM command at the connector. The repair is replacement of the front DRL/turn-signal LED module; on the assembly-defect cases the fix is a new module installed with the correct thermal interface material between the LED board and the heat spreader, so specifically verify thermal compound is present on the replacement. Where the module is not separately serviced or where the housing has melted, the complete headlamp assembly must be replaced.

Typical repair cost:$300 - $1,200

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2019-2024 Cadillac XT4 LSY 2.0T, two related 9T50 nine-speed complaints that are distinct from the coolant-contamination shudder: first, a clutch-like pop or jerk in first through third gear while decelerating, present from new on some vehicles; second, the transmission never selects 9th gear in normal automatic operation - owners can only reach 9th by using the paddle shifter or by dropping into manual mode and flicking back to auto. Dealers cite GM bulletin 21-NA-181, which characterizes reduced top-gear usage as normal efficiency-driven shift scheduling, but owners report the same vehicle holding 9th once manually commanded, which points to shift-scheduling calibration behavior rather than a hardware fault. A reprogram and relearn alone frequently does not change it.

Common Symptoms

  • Clutch-like pop or jerk in gears 1-3 while decelerating
  • Transmission never shifts into 9th gear automatically
  • 9th gear only reachable via paddle shifter or manual mode
  • Rough downshifts approaching a stop
  • Higher than expected cruising RPM on the highway

How to Fix

First rule out the real hardware causes: check transmission fluid level and condition and specifically test for coolant/glycol contamination, because a contaminated 9T50 produces overlapping symptoms. If fluid is clean, have the dealer install the latest transmission control module calibration and perform a full adaptive-shift relearn (fast learn plus a proper drive cycle) - the relearn matters as much as the software. For the low-gear deceleration pop, GM's fix path is the updated TCM calibration; persistent mechanical popping after a completed relearn warrants inspection of the low/reverse and 1-2-3-4 clutch apply for early wear. Reference bulletin 21-NA-181 for the 9th-gear behavior so expectations are set before paying for teardown.

Typical repair cost:$150 - $1,200

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Community Reported
Medium ConfidenceVerifiedReviewed Aug 2026

On the 2019-2022 Cadillac XT4, aWD XT4s use a twin-clutch rear drive unit with a front-axle disconnect that decouples the driveshaft for fuel economy. When the disconnect actuator, its position sensor, or the rear drive unit clutch control fails, the driver information center posts "Service All Wheel Drive System" and the vehicle reverts to front-wheel drive. Owners report the message appearing at very low mileage - CarComplaints logs the 2020 average at roughly 2,000 miles - which points to a component or calibration defect rather than wear. The vehicle remains drivable in FWD, but traction in snow and rain is materially reduced and the fault is often intermittent, clearing on a restart and returning later.

Common Symptoms

  • "Service All Wheel Drive System" message in the driver information center
  • Vehicle behaves as front-wheel drive in snow or rain
  • Message clears on restart and returns later
  • Clunk or bind from the driveline when AWD engages

How to Fix

Scan the all-wheel-drive control module for stored codes rather than clearing the message; the actuator position and clutch-solenoid circuit codes identify whether the front axle disconnect actuator, the rear drive unit clutch assembly, or wiring is at fault. Inspect and reseat the AWD module and actuator connectors first, since connector corrosion produces the same intermittent message. Confirm the AWD control module has current software, as GM has released reprogramming for false AWD messages. Hardware repair is replacement of the front axle disconnect actuator or, in more serious cases, the rear drive unit clutch pack.

Typical repair cost:$400 - $2,500

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Community Reported
Low ConfidenceVerifiedReviewed Aug 2026

On the 2020-2025 Cadillac XT4, a loud high-pitched squeal comes from the front brakes at low speed, most reliably on the first few stops of the morning and when backing out of a garage, then disappears for the rest of the drive cycle. Inspection consistently finds the pads have plenty of material left and the wear sensors are not contacting, so this is a friction-material and anti-noise-hardware resonance issue rather than worn brakes. GM addressed the condition for the 2020 model year in bulletin 20-NA-002, but owners of later XT4s report the identical noise and are told the bulletin does not apply to their model year, leaving them without a covered repair.

Common Symptoms

  • High-pitched squeal under light braking below 10 mph
  • Front brakes squeak when backing out of the garage
  • Noise only on the first few stops of the day
  • Noise disappears after brakes warm up
  • Pads measured with plenty of material remaining

How to Fix

Confirm pad thickness and rotor condition first to rule out an actual wear or glazing problem. The effective repair is installing GM's revised front brake pad set with new hardware, applying the correct high-temperature anti-squeal lubricant to the pad ears, backing plates, and caliper abutment surfaces, and re-bedding the brakes. On out-of-scope model years, an aftermarket ceramic pad set with fresh shims and properly greased hardware resolves the noise for most owners. Reference bulletin 20-NA-002 when discussing with the dealer.

Typical repair cost:$150 - $500

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Community Reported
Low ConfidenceVerifiedReviewed Aug 2026
NHTSA Recalls4 recalls

STRUCTURE:INTERIOR PANELS:DASHBOARD

General Motors, LLC (GM) is recalling certain 2025 Cadillac XT4 vehicles. The instrument panel may be missing the perforation on the underside of the panel cover that allows the passenger-side air bag to deploy properly.

Campaign #24V79500024/10/2024

SEATS

General Motors, LLC (GM) is recalling certain 2021 Chevrolet Malibu, 2022 Chevrolet Equinox, Blazer and Cadillac XT4 vehicles. The driver's seat cushion frame may have an improper weld in the power tilt-adjustment mechanism.

Campaign #22V35900019/05/2022

EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

General Motors, LLC (GM) is recalling certain 2024 Cadillac XT4 and Chevrolet Malibu vehicles. The vehicles may have the wrong owner's manual in the glove box. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 225, "Child Restraint Anchorage Systems."

Campaign #24V57500001/08/2024
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Frequently Asked Questions

What are the most common Cadillac XT4 problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Cadillac XT4 has 8 documented issues. The most frequently reported are: Fuel Pump Control Module Failure Causes Sudden Stall and Crank-No-Start (P203F), Daytime Running Light / Turn Signal LED Module Overheats and Burns Out, 9T50 Clutch Pop in Low Gears on Deceleration and Refusal to Engage 9th Gear. Of these, 1 is rated critical and should be addressed promptly.

Is the Cadillac XT4 reliable?

The 2021 Cadillac XT4 has 8 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 1 issue is rated critical: Fuel Pump Control Module Failure Causes Sudden Stall and Crank-No-Start (P203F). 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 Cadillac XT4 problems?

Repair costs for known Cadillac XT4 issues range from $50 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Fuel Pump Control Module Failure Causes Sudden Stall and Crank-No-Start (P203F), typically costs $600-$1,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2021-2025 Cadillac XT4 Fuel Pump Control Module Failure Causes Sudden Stall and Crank-No-Start (P203F)?

The fuel pump power control module (FPCM), mounted under the vehicle near the fuel tank on 9-speed 2.0T LSY XT4s, fails internally and stops commanding the in-tank pump. The failure is typically abrupt with no preceding driveability symptoms: the engine cuts out at speed or refus… Repairs typically run $600-$1,500. Severity: high.

What is the 2019-2021 Cadillac XT4 Daytime Running Light / Turn Signal LED Module Overheats and Burns Out?

The front DRL and turn-signal LED module in the XT4 headlamp assembly runs hot and fails. Owners report the light first going dim, then dead, and at least one teardown found the modules had been assembled with no heatsink thermal compound between the LED board and its heat spread… Repairs typically run $300-$1,200. Severity: medium.

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 compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.

SEAT BELTS:CRITICAL FASTENERS

General Motors, LLC (GM) is recalling certain 2016-2021 Chevrolet Malibu and 2019-2021 Cadillac XT4 vehicles. The rear seat belt retractors may be improperly secured with loose or missing fasteners.

Campaign #21V64900020/08/2021

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

What is the 2019-2024 Cadillac XT4 9T50 Clutch Pop in Low Gears on Deceleration and Refusal to Engage 9th Gear?

Two related 9T50 nine-speed complaints that are distinct from the coolant-contamination shudder: first, a clutch-like pop or jerk in first through third gear while decelerating, present from new on some vehicles; second, the transmission never selects 9th gear in normal automatic… Repairs typically run $150-$1,200. Severity: medium.

What is the 2019-2022 Cadillac XT4 LSY 2.0T Camshaft Carrier / Cam Cover Seal External Oil Leak Down the Passenger Side?

On the 2.0L LSY turbo, the camshaft carrier assembly bolts between the cylinder head and the cam cover, and its sealing surface (along with the intake manifold gasket area) develops an external oil leak, usually discovered during a routine oil-change multipoint inspection between… Repairs typically run $1,200-$3,500. Severity: medium.

What is the 2019-2025 Cadillac XT4 2.0T LSY Engine - PCV and Turbo Coolant Line Issues?

The XT4 uses the 2.0T LSY engine which is an evolution of the LTG found in the ATS/CTS. The LSY has improved reliability but shares some issues including PCV system problems and turbo coolant line leaks. The turbo coolant lines can develop leaks at the connections, causing coolan… Repairs typically run $200-$1,500. Severity: medium.

What is the 2019-2022 Cadillac XT4 "Service All Wheel Drive System" Message and Loss of AWD From Front Axle Disconnect Actuator?

AWD XT4s use a twin-clutch rear drive unit with a front-axle disconnect that decouples the driveshaft for fuel economy. When the disconnect actuator, its position sensor, or the rear drive unit clutch control fails, the driver information center posts "Service All Wheel Drive Sys… Repairs typically run $400-$2,500. Severity: medium.

What is the 2019-2025 Cadillac XT4 2.0L Turbo Excessive Oil Consumption?

The 2.0L turbocharged engine in the XT4 consumes oil at a higher-than-expected rate, with some owners reporting a quart consumed every 2,000-3,000 miles. The issue is related to the piston ring design and turbocharger oil scavenge system. GM has not issued a formal service bullet… Repairs typically run $50-$2,000. Severity: medium.

What is the 2020-2025 Cadillac XT4 Front Brake Squeal on First Stops of the Day and When Backing Out (TSB 20-NA-002)?

A loud high-pitched squeal comes from the front brakes at low speed, most reliably on the first few stops of the morning and when backing out of a garage, then disappears for the rest of the drive cycle. Inspection consistently finds the pads have plenty of material left and the… Repairs typically run $150-$500. Severity: low.