2025 model year · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 2025 Cadillac XT6 has 3 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $50 to $4,500. DIY maintenance guides at au7o.io.
On the 2020-2025 Cadillac 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 too new for widespread timing chain failures, but owners should monitor for early signs and plan for preventive replacement around 100,000-120,000 miles based on the engine's history in other models.
Monitor for timing chain rattle on cold starts. If codes or rattle develop, complete timing chain replacement is needed. Preventive replacement at 100,000-120,000 miles is wise based on the 3.6L's track record. Same Cloyes 9-0753S kit as other 3.6L applications.
Parts and tips from 0+ owners who fixed this issue
On the 2020-2025 Cadillac XT6, 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 leaks often go unnoticed.
Inspect the PTU seals and replace if leaking. Top off with the GM-specified PTU fluid. If the PTU is already noisy from running low on fluid, replacement is required as the unit is not rebuildable. Add PTU fluid level check to your routine maintenance schedule every 15,000 miles.
Parts and tips from 0+ owners who fixed this issue
On the 2020-2025 Cadillac XT6, 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.
Replace the AGM battery with a fresh ACDelco unit if the system is not functioning properly. Have the battery monitor sensor reset after replacement. GM has released recalibrations to improve start-stop smoothness. Aftermarket start-stop eliminator modules are available for owners who want to permanently disable the feature.
Parts and tips from 0+ owners who fixed this issue
VISIBILITY:WINDSHIELD
General Motors, LLC (GM) is recalling certain 2023 GMC Acadia and 2024 Cadilac XT5 and XT6 vehicles. The windshield may have been assembled without the proper urethane sealant required to bond the windshield to the vehicle body.
ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
General Motors, LLC (GM) is recalling certain 2023-2025 Cadillac XT5 and 2024-2025 Cadillac XT6 vehicles. The instrument panel may not illuminate when the hazard warning lights, high beams, or turn signals are activated. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard numbers 101, "Controls and Displays" and 108, "Lamps, Reflective Devices, and Assoc. Equipment."
SERVICE BRAKES, HYDRAULIC:FLUID
General Motors, LLC (GM) is recalling certain 2022 Cadillac XT6 vehicles. The brake fluid reservoir cap may be missing the warning label. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 135, "Light Vehicle Brake Systems."
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.
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.
+ 4 more recalls. Check all on NHTSA.gov
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According to Au7o's analysis of 0+ owner reports, the 2025-2025 Cadillac XT6 has 3 documented issues. The most frequently reported are: 3.6L V6 Timing Chain Concern (XT6), AWD Power Transfer Unit Fluid Leak, Auto Start-Stop Harshness and Battery Issues. None are rated critical, but regular maintenance is recommended.
The 2025-2025 Cadillac XT6 has 3 known issues documented across 0+ owner reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Cadillac XT6 issues range from $50 to $4,500, 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.
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.
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.
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.
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.
