There are 1 stored owner reports matching the powertrain & transmission leading-label group for the 2010 GMC Sierra in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 1 of 1 matching reports.
Open the full vehicle complaint log (all categories)I WAS TRAVELING HOME FROM VACATION AND ABOUT 70 MILES AN HOUR IN MY 2010 GMC SIERRA AND ALL OF A SUDDEN MY TRUCK REVVED UP AND MY TRANSMISSION WENT OUT. I ABOUT GOT HIT FROM BEHIND. I PULLED OVER AND THERE WAS SMOKE COMING FROM THE HOOD. I OPEN THE HOOD AND THERE'S TRANSMISSION FLUID FROM THE FRONT TO THE BACK UNDER THE TRUCK. ONE OF THE COOLING LINES RUBBED THE OTHER AND CHAFFED A HOLE. COST ME 150 DOLLARS IN TOWING FEES. GM DOESN'T WANT TO HONOR THEIR WARRANTY BECAUSE THEY REMOVED THIS PART OFF THEIR WARRANTY IN 2009. TRYING TO COVER UP THEIR MISTAKE .I CALLED GM PRIORITY CARE AND THEY HAD THE TRUCK TOWED TO BECK AND MASTEN GM. THEY ARE TRYING TO CHARGE ME FOR THE REPAIRS WHEN ITS A DEFECT ON GM'S PART. MY QUESTION IS HOW MANY INNOCENT DRIVERS ARE GOING TO GO BANKRUPT PAYING FOR A NEW TRANSMISSION WHEN IT WAS GM'S MISTAKE IN DESIGN. OR EVEN WORSE HOW MANY WILL GET KILLED ON THE HIGHWAY. I THINK I'VE MADE MY POINT! *JS
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.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.