2019 Cadillac XT4 Exterior lighting Problems
- Complaints
- 4about this part
- Share
- 18%of 22 total for the year
- Median mileage
- 82,375miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the exterior lighting of the 2019 Cadillac XT4, 18% of the 22 complaints for this model year. Where a mileage was given, the median is 82,375 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The passenger side DRL/turn signal is dim causing the vehicle visability to be reduced and other drivers unable to see turn indications, increasing the risk of crash. The design of the unit places undue heat near the circuit board causing the unit to fail. The driver's side does not have this issue. This is a known issue with many post on forums on it.”
NHTSA complaint #11693817, filed 2025-10“The contact owns a 2019 Cadillac XT4. The contact stated that while the vehicle was parked, the contact exited the vehicle and became aware that the daytime running light was out on the driver’s and passenger’s side. Neither the dealer nor an independent mechanic was contacted. No warning light was illuminated. The vehicle was not taken to the dealer or an independent mechanic to be diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was 75,000.”
NHTSA complaint #11691036, filed 2025-10, 75,000 miles“The contact owns a 2019 Cadillac XT4. The contact stated while driving at an undisclosed speed, the passenger’s side daytime running lights became inoperable. The passenger’s side daytime running light warning light was illuminated. The contact related the failure to Technical Service Bulletin No. 19-NA-184. The vehicle was taken to the local dealer, who informed the contact that there was no repair coverage on the vehicle for the failure. The mechanic diagnosed the vehicle and determined that the headlamp needed to be replaced. The vehicle was not repaired. …”
NHTSA complaint #11622520, filed 2024-10, 89,750 miles“Both running light modules failed due to overheating because there was no heatsink thermal compound installed on either unit. They had to be replaced. Repair was successful.”
NHTSA complaint #11690054, filed 2025-09Related service bulletins
- 11014170Jan 27, 2025This service bulletin provides information on Exterior Lamp Condensation and Water Leak Information and Replacement Guidelines.
- 11000550May 3, 2024This service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
- 10253062Mar 5, 2024This Preliminary information communicates to dealers? information related to a Malfunction Indicator Lamp (MIL) Illuminated due to a U0672 setting. Advises the technician to…
- 10249011Jan 12, 2024This informational bulletin provides information for dealers/technicians on Headlamp, Tail Lamp, License Lamp or Fog/Driving Lamp Damage.
Exterior lighting: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2021 | 1 | 8% |
| 2019 | 4 | 18% |
Other parts of the 2019 Cadillac XT4
12 complaintsTransmission and drivetrain
6 complaintsElectrical system
4 complaintsFuel system
3 complaintsOther or unknown
3 complaintsBrakes
1 complaintsSuspension
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2019 Cadillac XT4
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology