There are 2 owner-reported lighting complaints for the 2008 GMC Sierrain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2008 GENERAL MOTOR COMPANY SIERRA 1500. THE CONTACT WAS DRIVING IN REVERSE 2 MPH OUT OF THE DRIVE WAY WHEN SMOKED EMITTED FROM THE REAR OF THE VEHICLE. THE CONTACT STOPPED THE VEHICLE AND CONFIRMED THAT THE DRIVERS SIDE REAR TAIL LIGHT MARKER ASSEMBLY WAS ON FIRE. THE VEHICLE WAS TAKEN TO THE DEALER AND A PRIVATE MECHANIC. THE PRIVATE MECHANIC CONFIRMED THAT THERE WAS A DEFECTIVE MARKER TAIL LIGHT ASSEMBLY. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGE WAS 120,000.
MY 2008 GMC SIERRA DENALI HAS WATER CONDENSATION IN BOTH OF THE TAIL LIGHTS. ITS NEVER HAPPENED BEFORE ON ANY OF MY GMC TRUCKS AND THIS DENALI WASN'T CHEAP.
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 25, 2026