There are 2 owner-reported fuel system complaints for the 2016 GMC Terrainin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Fuil tank is leaking from the top of the fuil tank.
Multiple brake lines have corroded out of the gas tank. This caused gas to slowly leak from the vehicle . Not available for inspection - currently being fixed. Dealer confirmed multiple lines corroding. It has been inspected by a certified dealer, Golling in Chelsea, Michigan. There was no warning. Initially smelled gas, but could not pinpoint where it was coming from. Eventually the leak became so large that gas usage was excessive and smell was very strong.
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