This service bulletin provides information on Exterior Lamp Condensation and Water Leak Information and Replacement Guidelines.
full bulletin at NHTSA ↗2019 Cadillac XT4 lighting problems
moderate Owners of the 2019 Cadillac XT4 have filed 4 NHTSA complaints about the lighting at roughly $250 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See lighting across all vehicles →
Complaints
4
Recalls
0
Avg fix
$250
When does it fail?
Of the 4 lighting complaints filed for the 2019 Cadillac XT4, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Lighting accounts for 20% of all owner complaints filed against this vehicle, across 3 categories tracked.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering lighting on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warranty Coverage Period.
full bulletin at NHTSA ↗This Preliminary information communicates to dealers? information related to a Malfunction Indicator Lamp (MIL) Illuminated due to a U0672 setting. Advises the technician to perform Electric Engine Coolant Pump connection inspections. To clear the code to see if it resets current. If the code resets it advises to utilize Strategy Based Diagnosis. If the code does not reset, it advises to release the vehicle to the customer and that GM is aware of this issue.
full bulletin at NHTSA ↗This informational bulletin provides information for dealers/technicians on Headlamp, Tail Lamp, License Lamp or Fog/Driving Lamp Damage.
full bulletin at NHTSA ↗This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 4 most recent
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…
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 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…
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.
Had lighting trouble with your 2019 Cadillac XT4?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the lighting problem on the 2019 Cadillac XT4?
It's a documented issue but not catastrophic. 4 complaints have been filed. Repairs average $250 and most owners catch it before it causes a breakdown.
At what mileage does the lighting typically fail?
Based on the 4 complaints filed, lighting issues most often appear around 82,375 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $250 for lighting repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to lighting?
No active recalls currently cover lighting issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2019/Cadillac/XT4.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.