There are 3 owner-reported visibility & wipers 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 GMC SIERRA DENALI. THE CONTACT STATE THAT DURING RAINY WEATHER, WATER WOULD LEAK INTO THE VEHICLE FROM THE SUNROOF RESULTING IN SEVERE WATER DAMAGE TO THE HEADLINER. THE VEHICLE WAS NEITHER DIAGNOSED NOR REPAIRED FOR THE FAILURE. THE FAILURE MILEAGE WAS 45,000.
TL*THE CONTACT OWNS A 2008 GMC SIERRA 1500. IN COLD WEATHER, THE WINDSHIELD WIPERS FREEZE UP AND FAIL TO WIPE THE WINDSHIELD. THE CONTACT ATTEMPTED TO REPLACE THE PART TO THE WINDSHIELD, BUT COULD NOT FIND A WINTER BLADE. THE DEALER WAS UNABLE TO ASSIST AND STATED THAT THERE WERE MANY COMPLAINS ABOUT THE WINTER BLADES NOT BEING AVAILABLE. THE FAILURE AND CURRENT MILEAGES WERE 6,200. UPDATED 1/6/09 *CN UPDATED 01/14/09.*JB
WHILE SLOWLY BACKING MY 2008 GMC SIERRA PICK-UP TRUCK INTO THE GARAGE, THE MIRROR SURFACE CONTACTED THE SIDE OF THE GARAGE, CRACKING THE MIRROR. INSURANCE COMPANY RECOMMENDED HAVING AN AUTO GLASS SHOP REPLACE THE MIRROR, BUT A SMALL, FLIMSY PLASTIC CLIP THAT HAD BROKEN ON THE BACK OF THE MIRROR PREVENTED THEM FROM DOING SO. CUT HAND ON BROKEN MIRROR SURFACE AFTER REMOVED BY GLASS SHOP. DEALER ESTIMATED REPAIR AT $213.02. GM CORPORATE REFUSED TO ACKNOWLEDGE DEFECT IN MIRROR BACKING CLIP AND REFUSED ANY ASSISTANCE WHATSOEVER (DISTRICT SPECIALIST LEVEL REFERRAL FROM OWNER RELATIONS CENTER. I THOUGHT THAT FLEXIBLE MIRROR ASSEMBLIES WERE SUPPOSED TO SURVIVE MINOR COLLISIONS - A PREVIOUS GM VEHICLE (BLAZER) PERFORMED ADMIRABLY IN A 25 MPH COLLISION WITH A CHROME F250 TRUCK MIRROR W/NO DAMAGE TO THE BLAZER MIRROR OR ASSEMBLY. THE GMC "PROFESSIONAL GRADE" (TERM USED VERY LOOSELY HERE) TRUCK THAT I NOW OWN WON'T EVEN STAND UP TO A MINOR CLIP ON THE SIDE OF THE GARAGE AT SLOW SPEED. ENGINEERING DEFECTS ARE 1) MIRROR ACTUATOR ASSEMBLY IS OF POOR QUALITY AND/OR WORKMANSHIP AND 2) MIRROR ASSEMBLY MOVES UP SLIGHTLY WHEN PIVOTING, WHICH PROBABLY CONTRIBUTED TO THE BREAKAGE AT SUCH SLOW SPEED (WAS SLOWLY BACKING UP AN INCLINE INTO THE GARAGE). APPARENTLY, I WAS NOT CONVINCING ENOUGH TO GM THAT THEY HAVE A PROBLEM WITH FLIMSY MIRRORS - PERHAPS NHTSA AND BBB CAN BE MORE PERSUADING. ALL I ASKED FOR WAS THAT THEY COVER THE FLIMSY PLASTIC ACTUATOR AND PART OF THE $93 LABOR QUOTED FOR THE JOB BY THE DEALER. THE MIRROR ITSELF I HAVE NO QUALMS PAYING FOR. OLD PARTS ARE AVAILABLE ON THE TRUCK - I PLAN TO DRIVE MY NEARLY NEW TRUCK "AS IS" FOR A WHILE AS A SYMBOL OF GM'S POOR QUALITY OF WORKMANSHIP AND POOR CUSTOMER SERVICE. I ALSO PLAN ON TELLING AS MANY PEOPLE AS POSSIBLE ABOUT HOW FLIMSY GM MAKES THEIR VEHICLES AND HOW NON-EXISTENT THEIR CUSTOMER SUPPORT IS. *TR
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