What is the 2021 Cadillac XT6 2021 XT6 Fuel Supply Line May Separate and Leak — Recall 21V422?

If you own a 2021 Cadillac XT6, this one is worth a VIN check. GM recalled a limited group of 2021 XT6, XT5 and GMC Acadia vehicles because the fuel supply lines may have been improperly attached and seated at the factory. NHTSA's consequence statement is blunt: lines that are no… Severity: high.

What is the 2022 Cadillac XT6 2022 XT6 Left-Rear Toe Link May Be Loose or Separate — Recall 22V427?

If you drive a 2022 Cadillac XT6, check this one. General Motors recalled a group of these SUVs after finding that the left-rear suspension toe link may not have been tightened properly. An under-tightened fastener can allow the toe link to go loose over time, and a loose toe lin… Severity: high.

What is the 2022 Cadillac XT6 Recall 22V446000: Fuel Tank Rollover Valve May Fail to Seal on 2022 XT6?

Certain 2022 Cadillac XT6 crossovers were recalled by General Motors for a fuel tank rollover valve that may not seal properly in a rollover crash. NHTSA files the defect against the gasoline storage tank assembly. The rollover valve's whole purpose is to shut the tank's vent pat… Severity: high.

What is the 2020-2023 Cadillac XT6 9-Speed Automatic Transmission Shudder and Harsh Shifts?

The XT6's GM 9T65 9-speed automatic transmission exhibits shuddering during light throttle acceleration between 25-50 mph, similar to driving over rumble strips. The torque converter clutch wears prematurely, contaminating the transmission fluid. Repairs typically run $150-$2,500. Severity: medium.

What is the 2020-2021 Cadillac XT6 Rearview Camera Cuts Out Due to Bad Coaxial Cable Crimp on Surround Vision-Equipped XT6 (Recall 22V709000)?

If your 2020 or 2021 Cadillac XT6 was ordered with the optional Surround Vision feature, it may be part of NHTSA recall 22V709000. GM found that the coaxial cable connectors carrying the rearview camera signal may have been crimped improperly, and a faulty crimp can cause the rea… Severity: medium.

What is the 2020-2025 Cadillac XT6 3.6L V6 Timing Chain Concern (XT6)?

The XT6 uses the GM 3.6L V6 (LGX) which has a documented history of timing chain stretch across the GM lineup. While the LGX generation is improved over earlier 3.6L variants, the three-chain design with plastic guides remains a long-term reliability concern. Most XT6s are still… Repairs typically run $2,500-$4,500. Severity: medium.

What is the 2020-2025 Cadillac XT6 AWD Power Transfer Unit Fluid Leak?

The Power Transfer Unit (PTU) on AWD-equipped XT6 models develops seal leaks that allow fluid to seep out. Low PTU fluid causes the internal gears and bearings to wear prematurely, eventually producing a whining noise. The PTU is not included in routine maintenance schedules, so… Repairs typically run $200-$2,000. Severity: medium.

What is the 2020-2021 Cadillac XT6 Low-Speed TCC Shudder Must Be Confirmed Before a Fluid Drain and Fill?

GM PIP5608F covers 2020-2021 XT6 vehicles with 9-speed transmissions RPO M3G or M3W when torque-converter clutch shudder occurs on re-apply after a shift at 40 mph or below. GM identifies possible excessive assembly lubricant in the fluid and requires confirmation with TCC slip d… Severity: medium.

What is the 2024 Cadillac XT6 Windshield Not Properly Bonded to the Body — Missing Urethane Sealant, Recall 23V681?

NHTSA campaign 23V681000 covers 2024 Cadillac XT6 vehicles whose windshield may not have been bonded to the body with the proper urethane sealant during assembly. The windshield is a structural part of the vehicle: it braces the roof in a rollover and it provides the backstop the… Repairs typically run $0-$0. Severity: medium.

What is the 2024-2025 Cadillac XT6 Instrument Panel Fails to Illuminate Hazard, High-Beam and Turn-Signal Telltales — Software Recall 24V459?

NHTSA campaign 24V459000 covers late-build Cadillac XT6 vehicles on which the instrument panel cluster may not illuminate when the hazard warning lights, high beams, or turn signals are activated. The cluster software fails to light the corresponding telltales, so the driver gets… Repairs typically run $0-$0. Severity: medium.

What is the 2020-2021 Cadillac XT6 Water Leaks Into the Interior Through Pinholes in the Roof Panel Laser Braze — Wet Carpet and Inoperative Liftgate Actuator?

GM bulletin 19-NA-167 covers water leaking into the interior on the 2020-2021 Cadillac XT6 (alongside the 2017-2021 XT5 and GMC Acadia). Owners find wet carpet or headliner at the front and/or rear, on either side, typically after rain or a car wash. The cause is not the sunroof… Repairs typically run $300-$1,200. Severity: medium.

What is the 2020-2025 Cadillac XT6 Auto Start-Stop Harshness and Battery Issues?

The auto start-stop system engages and disengages harshly, causing the vehicle to shudder on restart. The AGM battery required for the system degrades quickly, and when it weakens, the start-stop system becomes erratic or disables itself. Many owners find the system intrusive. Repairs typically run $50-$400. Severity: low.

What is the 2020-2022 Cadillac XT6 Loss of Cabin Heat Caused by an Engine Control Module Software Anomaly — Bulletin 22-NA-094?

GM bulletin 22-NA-094, issued July 2022, addresses a loss of cabin heat on the Cadillac XT6 and XT5. Owners get little or no warm air from the vents even after the engine reaches operating temperature — the complaint typically shows up in cold weather and is easy to misdiagnose a… Repairs typically run $0-$200. Severity: low.

Cadillac · Known Issues

2020-2025 Cadillac XT6 Problems: 17 Known Issues

2020-2025 model years · 200+ owner reports · Updated August 2026

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According to Au7o's analysis of 200+ owner reports, the 2020-2025 Cadillac XT6 has 17 documented known issues, with 7 rated critical. The most serious are 2021 XT6 Fuel Supply Line May Separate and Leak — Recall 21V422, 3.6L LGX Engine Oil Migrating Into the Cooling System Through Block Porosity — Overheating with Sludge in the Radiator ($3,000-$12,000 repair), 2022 XT6 Left-Rear Toe Link May Be Loose or Separate — Recall 22V427, Incorrect Transmission Sun Gear Lets the Driver-Side Half-Shaft Disengage — Recall 23V172 ($0-$0 repair), 2020 XT6 Start/Stop Accumulator May Be Missing Endcap Bolts — Recall 20V668000, Recall 22V446000: Fuel Tank Rollover Valve May Fail to Seal on 2022 XT6 and Electric Power Steering Rack Failure — "Steering Assist Is Reduced / Service Power Steering" with C0460 or C0545 ($1,500-$2,600 repair). The most commonly reported issue is 9-Speed Automatic Transmission Shudder and Harsh Shifts with 200 owner reports. at .

Frequently Asked Questions

What are the most common Cadillac XT6 problems?

According to Au7o's analysis of 200+ owner reports, the 2020-2025 Cadillac XT6 has 17 documented issues. The most frequently reported are: 2021 XT6 Fuel Supply Line May Separate and Leak — Recall 21V422, 3.6L LGX Engine Oil Migrating Into the Cooling System Through Block Porosity — Overheating with Sludge in the Radiator, 2022 XT6 Left-Rear Toe Link May Be Loose or Separate — Recall 22V427. Of these, 7 are rated critical and should be addressed promptly.

Is the Cadillac XT6 reliable?

The 2020-2025 Cadillac XT6 has 17 known issues documented across 200+ owner reports. 7 issues are rated critical: 2021 XT6 Fuel Supply Line May Separate and Leak — Recall 21V422 and 3.6L LGX Engine Oil Migrating Into the Cooling System Through Block Porosity — Overheating with Sludge in the Radiator and 2022 XT6 Left-Rear Toe Link May Be Loose or Separate — Recall 22V427 and Incorrect Transmission Sun Gear Lets the Driver-Side Half-Shaft Disengage — Recall 23V172 and 2020 XT6 Start/Stop Accumulator May Be Missing Endcap Bolts — Recall 20V668000 and Recall 22V446000: Fuel Tank Rollover Valve May Fail to Seal on 2022 XT6 and Electric Power Steering Rack Failure — "Steering Assist Is Reduced / Service Power Steering" with C0460 or C0545. 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 XT6 problems?

Repair costs for known Cadillac XT6 issues range from $0 to $12,000, 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 year Cadillac XT6 is the most reliable?

Reliability varies across model years of the Cadillac XT6. 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 2020-2025 Cadillac XT6 with 17 documented issues documented across 200+ owner reports.

All 17 Known Issues

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Frequently Asked Questions

What are the most common Cadillac XT6 problems?

Is the Cadillac XT6 reliable?

How much does it cost to fix common Cadillac XT6 problems?

What year Cadillac XT6 is the most reliable?

2021 XT6 Fuel Supply Line May Separate and Leak — Recall 21V422#

Recall 22V446000: Fuel Tank Rollover Valve May Fail to Seal on 2022 XT6#

2020 XT6 Start/Stop Accumulator May Be Missing Endcap Bolts — Recall 20V668000#

9-Speed Automatic Transmission Shudder and Harsh Shifts#

Low-Speed TCC Shudder Must Be Confirmed Before a Fluid Drain and Fill#

Incorrect Transmission Sun Gear Lets the Driver-Side Half-Shaft Disengage — Recall 23V172#

AWD Power Transfer Unit Fluid Leak#

3.6L LGX Engine Oil Migrating Into the Cooling System Through Block Porosity — Overheating with Sludge in the Radiator#

2022 XT6 Left-Rear Toe Link May Be Loose or Separate — Recall 22V427#

Electric Power Steering Rack Failure — "Steering Assist Is Reduced / Service Power Steering" with C0460 or C0545#

Windshield Not Properly Bonded to the Body — Missing Urethane Sealant, Recall 23V681#

Water Leaks Into the Interior Through Pinholes in the Roof Panel Laser Braze — Wet Carpet and Inoperative Liftgate Actuator#

Instrument Panel Fails to Illuminate Hazard, High-Beam and Turn-Signal Telltales — Software Recall 24V459#

Auto Start-Stop Harshness and Battery Issues#

Rearview Camera Cuts Out Due to Bad Coaxial Cable Crimp on Surround Vision-Equipped XT6 (Recall 22V709000)#

3.6L V6 Timing Chain Concern (XT6)#

Loss of Cabin Heat Caused by an Engine Control Module Software Anomaly — Bulletin 22-NA-094#