There are 4 owner-reported engine complaints for the 2009 GMC Sierrain NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
TL* THE CONTACT OWNS A 2009 GMC SIERRA. THE CONTACT STATED THAT WHILE DRIVING AT ANY SPEED, THE SERVICE TRACTION CONTROL AND THE STABILIZER TRACK CONTROL WARNING LIGHTS ILLUMINATED. IN ADDITION WHEN DRIVING OVER 50 MPH, THE ENGINE MADE A CLINKING NOISE AND THEN STALLED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 60,000.
TL* THE CONTACT OWNS A 2009 GMC SIERRA. WHILE DRIVING 60 MPH, THE ENGINE POWER SUDDENLY REDUCED TO 40 MPH AND THE ENGINE COMPLETELY SHUT OFF. THE ENGINE RESTARTED WITH SLOW ACCELERATION AND UNKNOWN WARNING INDICATORS ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC. THE TECHNICIAN DIAGNOSED THAT THE THROTTLE POSITION SENSOR WAS FAULTY. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 62,000.
ABOUT 2 MONTHS AFTER WE PURCHASED OUR PRE-OWNED 2009 GMC SIERRA DENALI WE STARTED HAVING PROBLEMS WITH THE ENGINE POWER AND ALL SENSORS GOING OFF. THE SENSORS START GOING OFF THE STABILITY CONTROL CUTS OFF IT SAYS ENGINE POWER REDUCED THEN DOESN'T WANT TO SHIFT AND KILLS IN MIDDLE OF TRAFFIC. IT WILL DO IT FOR A FEW DAYS AND THEN JUST STARTS WORKING RIGHT AGAIN. SO WE NEVER KNOW WHEN IT'S GOING TO HAPPEN OR WHERE WE WILL BE. IT'S LIKE IT'S NOT RUNNING ON ALL CYLINDERS. *TR
TL*THE CONTACT OWNS A 2009 GMC SIERRA 1500. THE CONTACT STARTED THE IGNITION AND HEARD A LOUD KNOCKING NOISE ON THE OUTSIDE OF THE VEHICLE. THE FAILURE BEGAN ONE WEEK AFTER THE VEHICLE WAS PURCHASED. IN ADDITION, THE BRAKES WOULD SHAKE AND VIBRATE WHEN THEY WERE ENGAGED. THE ENGINE CONSUMED AN EXCESSIVE AMOUNT OF OIL. THE AIR BAG SENSOR ALSO CAUSED THE AIR BAG WARNING LIGHT INDICATOR TO ILLUMINATE. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE ENGINE AND AIR BAG SENSORS WERE REPLACED. THE ENGINE FAILURE CONTINUED TO OCCUR AFTER THE ENGINE WAS REPLACED. THE CONTACT STATED THAT THE VEHICLE WAS TAKEN TO THE DEALER FIFTEEN TIMES. THE MANUFACTURER WAS NOTIFIED OF THE FAILURES AND ONLY OFFERED HER A FREE OIL CHANGE FOR ONE YEAR. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 1,000.
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