There are 1 owner-reported lighting complaints for the 2020 GMC Terrainin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Interior lights stays on at night while driving and when parked. Tried turning it off but it won’t turn off
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