AI Damage2021 Cadillac XT4: common problems
Owners of the 2021 Cadillac XT4 filed 4 complaints with NHTSA, most often about fuel/propulsion system and exterior lighting. The maker issued 684 service bulletins for this year. Details by component below, with sources.
Key figures
- Owner complaints
- 4
- Technical service bulletins (TSB)
- 684
What fails most often
- 1 Fuel/propulsion system 75% of all complaints
- 2 Exterior lighting 25% of all complaints
- Fuel/propulsion system: 3 complaints (75% of all); manufacturer bulletins for this component: 17.
- Exterior lighting: 1 complaints (25% of all); manufacturer bulletins for this component: 15.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 2 L · petrol · turbo · 4 cyl
- automatic, 9-speed
Drive: FWD, AWD
Symptoms owners describe
How many of the 4 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Fuel/propulsion system | 3 | 0 | 17 |
| Exterior lighting | 1 | 0 | 15 |
| Equipment | 0 | 0 | 196 |
| Electrical system | 0 | 0 | 153 |
| Engine and cooling | 0 | 0 | 106 |
| Powertrain | 0 | 0 | 67 |
| Engine | 0 | 0 | 64 |
| Wheels | 0 | 0 | 32 |
| Backover prevention | 0 | 0 | 26 |
| Structure | 0 | 0 | 26 |
| Fuel system | 0 | 0 | 25 |
| Tires | 0 | 0 | 17 |
| Service brakes | 0 | 0 | 15 |
| Suspension | 0 | 0 | 13 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
DTRL failed and signal burned/melted I was unable to pass state inspection
there is a recall on the 2021 cadillac xt4, fuel pump control module, N252516900, but my vin is not included. My vehicle seems to be having the same issue. The dealer has been unable to diagnose as it has been happening very sporadic and I don't drive often.
Vehicle stalled on the road,coming to a total stop,very dangerous because of the trafic.Vehicle cranks but not start.Fuel pump power control module failed,code p203f.Take to [dealer] dealer for repair .This happened 2 times ,at 13765 milles and 29342 milles
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 1,741 of 2,102 model years in the NHTSA data (among the 17% least complained about).
On average one model year of the XT4 has 11 complaints (9 years in the data). This year has 4, below average.
What to check before buying
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
- Exterior lighting. Headlamps, leveling, sensors and mounts after a frontal hit.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Engine and cooling. Radiator and fan after a frontal hit, coolant level and condition, overheating.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it
- This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance
- This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
- PI to help diagnose A/C concern
- This Preliminary information communicates an issue with an OTA pending message still displayed after an…
This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
- Pi created to provide GM dealers with information on gathering information for projection issue
- This preliminary information communicates information about how to determine if a wheel and tires size…
- Improvements to OnStar functionality
- This preliminary information discusses a condition that may arise from the drivers window switch sending…
This preliminary information discusses a condition that may arise from the drivers window switch sending an errant message causing the vehicle to enter manual fob learn mode.
- This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a…
This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
- This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic…
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
- Improvements to OnStar functionality
During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
NHTSA lists 684 bulletins for this year; the 12 newest are shown here.
Other years of this model
Questions and answers
What are the most common problems with the 2021 Cadillac XT4?
Owner complaints to NHTSA most often mention: fuel/propulsion system, exterior lighting. Total complaints: 4. The most frequent symptoms in complaint texts: fuel system, fuel smell (50%), stalls while driving (50%), won't start (25%).
How many service bulletins (TSB) were issued for the 2021 Cadillac XT4?
NHTSA lists 684 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2021 Cadillac XT4 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2021 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.