2019 Cadillac XT4 Lighting Problems

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.

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.

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.

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. The manufacturer was contacted and referred the contact to the NHTSA Hotline. The failure mileage was approximately 89,750.