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Cadillac · Known Issues

2020 Cadillac XT6 Problems: 11 Known Issues

2020 model year · 200+ owner reports · Updated September 2026

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2020 · Sport · 3.6L V6

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Vehicle data and repair guidance on this site are compiled with AI assistance and may contain errors. Always verify with your service manual or a qualified mechanic.

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According to Au7o's analysis of 200+ owner reports, the 2020 Cadillac XT6 has 11 documented known issues, with 3 rated critical. The most serious are Electric Power Steering Rack Failure — "Steering Assist Is Reduced / Service Power Steering" with C0460 or C0545 ($1,500-$2,600 repair), 3.6L LGX Engine Oil Migrating Into the Cooling System Through Block Porosity — Overheating with Sludge in the Radiator ($3,000-$12,000 repair) and 2020 XT6 Start/Stop Accumulator May Be Missing Endcap Bolts — Recall 20V668000. The most commonly reported issue is 9-Speed Automatic Transmission Shudder and Harsh Shifts with 200 owner reports. Across all issues with published estimates, repair costs range from $50 to $12,000. DIY maintenance guides at au7o.io.

In This Article

  • XT6 Transmission3
  • XT6 Steering1
  • XT6 Cooling1
  • XT6 Safety/Recalls1
  • XT6 Drivetrain1
  • XT6 Body/Panels1
  • XT6 Engine1
  • XT6 Electrical1
  • XT6 HVAC1
  • Recalls9
  • FAQ
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In This Article

  • Transmission3
  • Steering1
  • Cooling1
  • Safety/Recalls1
  • Drivetrain1
  • Body/Panels1
  • Engine1
  • Electrical1
  • HVAC1
  • Recalls9
  • FAQ

All 11 Known Issues

NHTSA Recalls9 recalls

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."

Campaign #22V39200002/06/2022

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
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Other Cadillac Models

Cadillac XTS30Cadillac CT524Cadillac Escalade20Cadillac Lyriq19Cadillac CT617Cadillac DeVille17

Frequently Asked Questions

What are the most common Cadillac XT6 problems?

According to Au7o's analysis of 200+ owner reports, the 2020 Cadillac XT6 has 11 documented issues. The most frequently reported are: Electric Power Steering Rack Failure — "Steering Assist Is Reduced / Service Power Steering" with C0460 or C0545, 3.6L LGX Engine Oil Migrating Into the Cooling System Through Block Porosity — Overheating with Sludge in the Radiator, 2020 XT6 Start/Stop Accumulator May Be Missing Endcap Bolts — Recall 20V668000. Of these, 3 are rated critical and should be addressed promptly.

Is the Cadillac XT6 reliable?

The 2020 Cadillac XT6 has 11 known issues documented across 200+ owner reports. 3 issues are rated critical: Electric Power Steering Rack Failure — "Steering Assist Is Reduced / Service Power Steering" with C0460 or C0545 and 3.6L LGX Engine Oil Migrating Into the Cooling System Through Block Porosity — Overheating with Sludge in the Radiator and 2020 XT6 Start/Stop Accumulator May Be Missing Endcap Bolts — Recall 20V668000. 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. The most critical issue, Electric Power Steering Rack Failure — "Steering Assist Is Reduced / Service Power Steering" with C0460 or C0545, typically costs $1,500-$2,600 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2020-2023 Cadillac XT6 Electric Power Steering Rack Failure — "Steering Assist Is Reduced / Service Power Steering" with C0460 or C0545?

XT6 owners report a "Steering Assist is Reduced — Drive with Care" or "Service Power Steering" message in the driver information center, usually with a noticeable increase in steering effort. GM bulletin 20-NA-215 covers this condition on the XT5 and XT6 and ties it to DTCs C0460… Repairs typically run $1,500-$2,600. 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 200+ owner reports, NHTSA recalls, TSBs, and automotive forums.

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On the 2020 Cadillac XT6, only the 2020 model year of the Cadillac XT6 falls inside this GM recall, which addresses a start/stop transmission accumulator that may have left the plant with bolts missing from its endcap. Because those bolts hold the endcap against transmission oil pressure, the missing hardware can allow a transmission oil leak. NHTSA's consequence statement is blunt about where that goes: the leak may progress to a loss of propulsion, increasing crash risk, and transmission fluid in the presence of an ignition source may increase the risk of fire. The same defect was found across a range of 2018-2020 Chevrolet, Buick, GMC and Cadillac vehicles; the XT6's exposure is the 2020 year alone.

Common Symptoms

  • Transmission oil leak
  • Vehicle loses propulsion

How to Fix

Free of charge at a Cadillac dealer: the technician inspects the start/stop transmission accumulator on your 2020 XT6 and replaces the unit if any endcap bolts are missing. The recall opened to owners on December 15, 2020. If you bought the XT6 used, do not assume the previous owner had it done — check the VIN at nhtsa.gov/recalls, then book the inspection through Cadillac customer service at 1-800-458-8006. GM's recall number is N202313440.

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High ConfidenceVerifiedReviewed Aug 2026
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200 owners

On the 2020-2023 Cadillac XT6, 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.

This issue also affects: Buick Encore GX, Buick Regal, Cadillac DeVille

Common Symptoms

  • Shuddering at 25-50 mph
  • Vibration during light acceleration
  • Harsh 1-2 shift
  • Transmission hesitation
  • Feels like driving over rumble strips
  • Shudder worse when transmission is warm

How to Fix

A transmission fluid flush with the updated Mobil 1 Blue Label fluid resolves mild cases. Severe cases require torque converter replacement. A GM TSB authorizes fluid flush as the first repair attempt.

Typical repair cost:$150 - $2,500

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Based on 200 owner reports

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High Confidence200 owner reportsLast reported by owners Mar 2026Reviewed Mar 2026

On the 2020-2021 Cadillac XT6, 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 data or the scan-tool command test.

Common Symptoms

  • Low-speed shudder on TCC re-apply after a shift
  • Concern occurs at 40 mph or below
  • Concern changes when TCC is commanded on

How to Fix

Have a qualified transmission technician verify RPO M3G or M3W and confirm the event is TCC shudder using slip-speed data or the commanded-on test. If the bulletin criteria are met, follow the GM DEXRON VI drain-and-fill procedure and drive at least 200 miles before judging the repair. Do not use a universal additive or flush kit. The exact ShowMeTheParts lookup returned no transmission-fluid candidate.

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NHTSA Verified
High ConfidenceVerifiedReviewed Jul 2026

On the 2020-2023 Cadillac XT6, xT6 owners report a "Steering Assist is Reduced — Drive with Care" or "Service Power Steering" message in the driver information center, usually with a noticeable increase in steering effort. GM bulletin 20-NA-215 covers this condition on the XT5 and XT6 and ties it to DTCs C0460 and/or C0545 stored in the power steering module. The XT6 uses a belt-drive electric rack with the motor and control module integrated into the steering gear, so an internal fault or a torque-sensor signal fault sets the code and the module deliberately cuts or reduces assist rather than allowing erratic assist. Steering is still mechanically connected — the car remains steerable — but effort rises sharply, which is most alarming at parking-lot speeds or in an evasive maneuver. Owners also describe a separate, milder version where assist fades after sustained low-speed maneuvering and returns once the system cools; that thermal derate is normal protection, not a failed rack, and it clears itself.

This issue also affects: Chevrolet HHR, Chevrolet Malibu, Chevrolet Silverado 1500

Common Symptoms

  • "Steering Assist is Reduced — Drive with Care" message in the DIC
  • "Service Power Steering" warning
  • Steering suddenly becomes very heavy, especially at parking speeds
  • Assist cuts out intermittently and returns after a restart
  • Sometimes accompanied by other electrical warnings on the same drive

How to Fix

Have the power steering module scanned first. A stored C0460 or C0545 per bulletin 20-NA-215 calls for replacement of the complete steering gear assembly — the module is not serviced separately. After the rack is replaced the steering angle sensor must be recalibrated with a capable scan tool or the system will not function and the message will return. Out of warranty a rack and calibration typically runs roughly $1,500-$2,600 at a dealer. Before replacing anything, rule out the thermal derate (assist returns after cooling, no stored code) and a weak battery or poor ground, either of which can trigger a false assist-reduced message on this platform. The XT6's powertrain warranty does not cover this, but the 4-year/50,000-mile bumper-to-bumper coverage does.

Typical repair cost:$1,500 - $2,600

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Low ConfidenceVerifiedReviewed Aug 2026

On the 2020-2021 Cadillac XT6 3.6L V6 LGX, gM bulletin 21-NA-108 (which superseded PIP5257E) covers engine overheating with the cooling system contaminated by engine oil, and it lists the 2020-2021 Cadillac XT6 with the 3.6L LGX V6 among the affected applications. The failure is not a head gasket in the usual sense: pressurized oil from the main oil gallery migrates into a coolant water jacket through porosity or a thin-wall casting defect in the engine block. Because oil pressure is far higher than coolant pressure, oil pushes into the coolant rather than the other way round, and the surge tank and radiator fill with a thick brown oil-and-coolant emulsion that looks like a milkshake. That emulsion will not carry heat, so the engine overheats, and it plugs the radiator and heater core. GM bulletins 21-NA-147 and 22-NA-240 cover the related diagnosis of a coolant and/or oil leak with the malfunction indicator lamp on. This is engine-code specific — it is an LGX 3.6L casting issue and is not a claim about the 2.0L LSY turbo four also sold in the XT6.

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

Common Symptoms

  • Engine temperature climbing or overheat warning
  • Thick brown or tan milkshake-like sludge in the coolant surge tank and radiator
  • Engine oil level dropping with no external leak and no visible smoke
  • Coolant loss
  • Malfunction indicator lamp illuminated
  • Weak or oily-smelling cabin heat as the heater core plugs

How to Fix

Do not just flush the coolant and refill — the contamination will come straight back. Follow the bulletin's diagnostic sequence, which confirms the source by pressure-testing and by checking whether the oil level drops while the coolant turns to emulsion. Where the leak path is traced to block porosity, the repair is an engine block or complete engine replacement, which is why this is worth pursuing under the 6-year/70,000-mile GM powertrain warranty while it is still in force; document the concern in writing at the first sign of contamination. If contamination is confirmed, the radiator, surge tank, heater core and oil cooler all need flushing or replacement, since emulsified oil coats every passage. Out of warranty an engine replacement on an XT6 typically runs $8,000-$12,000.

Typical repair cost:$3,000 - $12,000

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On the 2020-2021 Cadillac XT6, 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 rearview camera to fail outright or work only intermittently. The practical effect for an XT6 driver is a missing or unreliable rear image when reversing, which NHTSA notes reduces rear visibility and increases crash risk. XT6s without Surround Vision are not covered. The campaign as a whole spans 95,231 vehicles across all the models it includes - that number is for the entire campaign and says nothing about how many XT6s are involved. GM tracks the recall internally as N222378380 and mailed owner letters on January 18, 2023.

Common Symptoms

  • No rearview camera image when backing up
  • Camera view flickers or works only intermittently
  • Surround Vision rear view unavailable

How to Fix

Dealers replace the affected coaxial cables at no charge to the owner. Take the XT6 to any Cadillac dealer and ask them to perform recall N222378380 / NHTSA 22V709000. Before you go, run your VIN through nhtsa.gov/recalls - it will tell you whether your XT6 is genuinely affected and whether the cable replacement has already been done. Cadillac customer service is at 1-800-458-8006 if the dealer cannot help.

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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.

This issue also affects: Cadillac SRX

Common Symptoms

  • Fluid leak near front of transmission
  • Whining noise from front drivetrain
  • AWD malfunction warning
  • Oil spots on driveway

How to Fix

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.

Typical repair cost:$200 - $2,000

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On the 2020-2021 Cadillac XT6, 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 drains that owners and shops usually chase first: it is pinhole voids in the laser braze joint between the roof panel and the outer body ring, and in the seam sealer over it. The bulletin says the pinholes are most often found near the top of the windshield at the A-pillars, or near the top of the liftgate at the D-pillars. Water entering at the D-pillars runs down into the rear of the vehicle, and the bulletin specifically notes that on the XT6 the liftgate actuator may become noisy or inoperative as a result — so an electrical complaint at the tailgate is a symptom of the body leak, not a separate failure. Left alone, trapped water rots carpet padding, grows mold, and corrodes rear body connectors.

Common Symptoms

  • Wet carpet or floor mats, front and/or rear
  • Damp headliner or water dripping from the A-pillar or D-pillar trim
  • Musty or mildew smell in the cabin
  • Power liftgate actuator noisy, slow, or inoperative
  • Water appears after rain or a car wash

How to Fix

Have the shop follow 19-NA-167 rather than starting with sunroof drain cleaning. The diagnosis is a water test of the roof-to-body laser braze at the A-pillar and D-pillar corners to find the pinholes, followed by resealing the braze joint and seam sealer at the void. Any water-damaged carpet and padding must be lifted and fully dried, and a liftgate actuator that has been soaked usually needs replacement even after the leak is sealed. Expect roughly $300-$1,200 for the leak repair and drying at a dealer, more if the actuator or a wet module has to be replaced; this is a factory body-sealing defect, so ask about warranty coverage before authorizing a paid repair.

Typical repair cost:$300 - $1,200

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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.

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

Common Symptoms

  • Rattling on cold start that goes away when warm
  • Check engine light with timing correlation codes at higher mileage
  • Rough idle developing gradually

How to Fix

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.

Typical repair cost:$2,500 - $4,500

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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.

This issue also affects: Buick LaCrosse, Buick Regal, Chevrolet Cruze

Common Symptoms

  • Harsh restart vibration
  • Start-stop not functioning
  • Battery warning message
  • Multiple systems acting erratic
  • Slow cranking on restart

How to Fix

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.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • AGM Battery (Group 94R / H7, 850 CCA) — main starting battery
    OEM88864542 (ACDelco Gold 94RAGM)Cross-refACDelco Professional 94RAGM (O'Reilly/RockAuto listing, 850 , ACDelco Gold 94RAGMHR (88866098) — high-reserve version, sam, Optima YellowTop DH7 (Group 94R AGM)$210–$330

    This is the fix part for the start-stop misbehavior described: on GM start-stop vehicles a weak or non-AGM battery makes the system restart harshly, cycle erratically, or shut itself off entirely. It must be an AGM in Group 94R/H7 — a fl…

  • Auto Start-Stop Eliminator Module (permanently defeats start-stop)
    Cross-ref4D Tech Auto Start Stop Eliminator, 2020-2026 Cadillac XT5/X, Autostop Eliminator (autostopeliminator.com) Cadillac applic$25–$110

    Optional — this is the second half of the documented fix, for owners who simply want the feature gone rather than to keep chasing it. There is no OEM part number: GM does not sell a permanent-disable part, and the dash button only turns …

Typical repair cost:$50 - $400

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On the 2020-2022 Cadillac XT6, 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 as a stuck thermostat, an air pocket in the cooling system, a blend door actuator, or a plugged heater core. GM traced it instead to a software anomaly in the engine control module: the ECM's thermal management strategy does not bring coolant temperature up or route flow to the heater core as intended, so the heater has nothing hot to work with. Because the fault is calibration rather than hardware, no part is actually broken, and owners who let a shop chase it mechanically can spend hundreds of dollars replacing a perfectly good thermostat or heater core before the real fix is applied.

Common Symptoms

  • Little or no heat from the vents in cold weather
  • Cabin takes an unusually long time to warm up, or never does
  • Engine coolant temperature gauge reads normal while the vents blow cool
  • Heat is intermittent — works on some drives and not others

How to Fix

The fix is a reprogram, not a part. Per bulletin 22-NA-094, the correction is to reprogram the engine control module with the updated calibration; this is a dealer or capable-shop operation using GM's programming tools and takes about an hour. Ask specifically for bulletin 22-NA-094 by number. Before authorizing a thermostat or heater core replacement for a no-heat complaint on an XT6, confirm the ECM calibration is current — under the 4-year/50,000-mile bumper-to-bumper warranty the reprogram is free, and even out of warranty it typically runs $100-$200 against $600-$1,400 for a heater core job that would not have fixed it.

Typical repair cost:$0 - $200

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High ConfidenceVerifiedReviewed Aug 2026

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."

Campaign #24V45900020/06/2024

EQUIPMENT:OTHER:LABELS

General Motors, LLC (GM) is recalling certain 2023 Cadillac XT5, XT6, and GMC Acadia vehicles. The certification label located on the driver's side B-pillar contains tire size information that may be illegible. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 110, "Tire Selection and Rims."

Campaign #22V70800022/09/2022

+ 4 more recalls. Check all on NHTSA.gov

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

get a full repair guide

What is the 2020-2021 Cadillac XT6 3.6L LGX Engine Oil Migrating Into the Cooling System Through Block Porosity — Overheating with Sludge in the Radiator?

GM bulletin 21-NA-108 (which superseded PIP5257E) covers engine overheating with the cooling system contaminated by engine oil, and it lists the 2020-2021 Cadillac XT6 with the 3.6L LGX V6 among the affected applications. The failure is not a head gasket in the usual sense: press… Repairs typically run $3,000-$12,000. Severity: high.

What is the 2020 Cadillac XT6 2020 XT6 Start/Stop Accumulator May Be Missing Endcap Bolts — Recall 20V668000?

Only the 2020 model year of the Cadillac XT6 falls inside this GM recall, which addresses a start/stop transmission accumulator that may have left the plant with bolts missing from its endcap. Because those bolts hold the endcap against transmission oil pressure, the missing hard… 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 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 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 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 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.