There are 1 owner-reported lighting complaints for the 2019 GMC Terrainin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
I was driving at nighttime and my head lights cut off.. they were in auto light mode. I read that gmc knows about some sort of issue with this but only covers repairs up to 150k miles. My car is 156k miles. There was no warning lights and no indication anything was wrong. Luckily I was the only care on my side of the highway and was able to slam on the brakes and come to a complete stop. I turned the car off and then turned the head lights to manual and they can back on. A few hours later when I got home, I let the car cool off and turned the headlight back to auto and turned the car on and the worked.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026