2021 Cadillac XT6 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
18 owner complaints analyzed
2 distinct recall campaigns
31,500 mi median reported failure mileage
Scope: 2021 model year. Data snapshot: . 4 complaints include usable failure mileage.
Most common problems
Electrical System is the most frequently named component, appearing in 4 of 18 complaints (22.2%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 3 | 16.7% |
| Electrical and battery issues | 2 | 11.1% |
| Fuel system concerns | 2 | 11.1% |
| Transmission and shifting | 1 | 5.6% |
| Steering behavior | 1 | 5.6% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Electrical System | 4 |
| Fuel/Propulsion System | 4 |
| Back Over Prevention | 3 |
| Engine | 3 |
| Unknown Or Other | 3 |
| Back Over Prevention: Warnings | 1 |
| Engine And Engine Cooling:Exhaust System | 1 |
| Forward Collision Avoidance: Automatic Emergency Braking | 1 |
Electrical System: 4; Fuel/Propulsion System: 4; Back Over Prevention: 3; Engine: 3; Unknown Or Other: 3; Back Over Prevention: Warnings: 1; Engine And Engine Cooling:Exhaust System: 1; Forward Collision Avoidance: Automatic Emergency Braking: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 1 |
| 25,000 to 49,999 | 3 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 1; 25,000 to 49,999: 3; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
25,000 to 49,999 miles has the most reports with usable mileage (3). 14 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2021 | 2 |
| 2023 | 5 |
| 2024 | 1 |
| 2025 | 5 |
| 2026 | 5 |
2021: 2; 2023: 5; 2024: 1; 2025: 5; 2026: 5
Pattern summary
Electrical System leads the component reports. Braking behavior appears in 3 complaint narratives. Electrical and battery issues appears in 2 complaint narratives. Fuel system concerns appears in 2 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11421817 · 2021-06-22 (June 22, 2021)
Front brake vibration, alarming grinding/rubbing/screeching sound each and every time service brakes are applied. Dealer claims this is a known GM problem with no fix available. I have purchased two Cadillacs Xt6 and Xt5 May 2021. Both vehicles have the same problem. Wife will not drive the new Cadillac. Service bulletin published sbout this same problem, December 2020. Still no resolution, June 2021.
Owner-reported narrative. Look up ODI 11421817 at NHTSA ↗
Owner report 11527711 · 2023-06-19 (June 19, 2023)
I was driving about 25mph all of the sudden the car automatic applied the brakes.
Owner-reported narrative. Look up ODI 11527711 at NHTSA ↗
Owner report 11530823 · 2023-07-07 (July 7, 2023)
The problem is the fuel pump control module is faulty and broke twice now. The car was purchased in 2021, new. Within months the fuel pump control module failed while I was driving in traffic, in an elementary school zone with children all around. I tried to drive through an intersection when without warning the car abruptly stopped causing the cars behind me to swerve to avoid a collision. Good samaritans had to push it far out of the way due to the children crossing. I was told by Sawgrass Cadillac that it was the fuel pump control module…
Owner-reported narrative. Look up ODI 11530823 at NHTSA ↗
Owner report 11708043 · 2025-12-31 (December 31, 2025)
[XXX] My 2021 XT6 occasionally stumbles when accelerating from a stop, both when the engine is running or when it has auto stopped, only occasionally. If the car won't accelerate properly, it can cause a collision, especially if making a left hand turn at an intersection. It started happening about June 2025 and kept reoccurring more frequently as time passed. It was brought to a dealer early August, they said that it might be a bad battery, I installed a new battery on August 19, 2025, it was ok until late November 2025, then it started happen…
Owner-reported narrative. Look up ODI 11708043 at NHTSA ↗
Owner report 11559826 · 2023-12-13 (December 13, 2023)
The vehicle's check engine light came on late afternoon and then started with a delayed turn over, but not actually starting thr following day. The vehicle had to be towed to the dealership. The technician and service advisor commented immediately that it is likely the fuel pump control module. With the commentary about the likely cause was that this is a widespread issue among GM vehicles. Thankfully, the vehicle was at home when it stopped starting but the transition from check engine to stopping operation was almost immediate.
Owner-reported narrative. Look up ODI 11559826 at NHTSA ↗
Owner report 11716802 · 2026-02-09 (February 9, 2026)
Cadillac XT6 – VIN: [XXX] echanical Failures, Ignored Transmission Recall(s), and Dealer Negligence I write this letter to formally place General Motors Company on notice of a pattern of serious mechanical failures, ignored safety recalls, and dealership indifference involving my Cadillac XT6, referenced above. This vehicle has been presented to Sam Leman Cadillac of Champaign on multiple occasions for mechanical issues, including, but not limited to, cooling system failures, thermostat defects, persistent check-engine warnings, and abnormal v…
Owner-reported narrative. Look up ODI 11716802 at NHTSA ↗
Owner report 11639372 · 2025-01-29 (January 29, 2025)
1)The display on dash reads upon start up, “Steering Assist Reduced”. 2)There is no Engine temperature readout displayed on cluster. 3)When the vehicle is turned off, the coolant fan stays running for a few minutes at full speed. All of these issues are correlated. Also, many XT5’s & XT6’s have had this issue in the past.
Owner-reported narrative. Look up ODI 11639372 at NHTSA ↗