58 of the
11,357 complaints filed about the GMC Sierra 1500
are about the seats —
1% of everything owners reported.
The worst model year for it is 1999.
The contact owns a 2024 GMC Sierra 1500. The contact stated that there was an unknown failure with the front and rear cameras. The driver's and passengers' side mirror indicators remained illuminated but occasionally failed to operate. There was a glare that was shining into the vehicle while it was raining and driving at night. The vehicle was taken to the local dealer, where it was diagnosed that an unknown module was not operating as needed. The rear wiring harness was replaced. The seat module and transmission were repaired, but the failure recurred. The manufacturer was contacted, and a case was opened. The Attorney General was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 9,000.
NHTSA complaint #11721762 — an unverified report by a vehicle owner.
Seat is squeaking loudly like if its loose or something is loose with it dealership and gm dont want to fix it they expect me to pay to fix something that ahouldnt even be happening on a 2 year old vehicle specially when you pay more than 70,000 dollars for a vehicle to be having this issue
NHTSA complaint #11713767 — an unverified report by a vehicle owner.
I purchased a 2018 GMC Sierra 1500 6.2 Denali new. I followed all service requirements including oil changes by GM dealerships. 2025 i noticed my truck power was decreasing. Than I started to hear knocking noses. I took it to a dealership for diagnosis but they couldn't identify anything. Finally it started to skip this is when a dealership diagnose it as being an issue with the active fuel management system. They said my lifters, camshaft, and various other parts was damaged and had to be replaced. Additionally, they said it was a recall on 6.2 engines with the same identical issue but my year wasn't included. The cost to repair approximately 10,000. I really need your attention to this matter! September 10, 2025 my truck placed me and others in danger when it lose engine power. Also my engine light was on for the first time.
NHTSA complaint #11696714 — an unverified report by a vehicle owner.
Rear sliding glass window is leaking water around the exterior frame. This is addressed in TSB 18-NA-383 but not covered under any warranty. My rear seats and carpet are becoming wet. I am concerned about the possibility of mold and an electrical short/fire resulting from water intrusion. There are many reports and discussions on the internet regarding this issue. Full window replacement estimated at $1300. Patchwork repair with caulk is estimated at $600 with no guarantees of success. I would expect GMC to cover the replacement of the rear glass in kind and remedy any other damage to my vehicle due to water intrusion into the cabin area.
NHTSA complaint #11657067 — an unverified report by a vehicle owner.
Intermittent problems with various systems freezing up or not working: Windshield wipers freezing for several seconds mid-wipe. Nearly caused accident. Heads up display not retaining settings Seat controls (bladders that inflate deflate) intermittently working/infotainment screen freeze (where seat control is displayed). Lane departure warning inconsistently working (beeping) Radio quits playing for several seconds and screen goes dark Blinker stops blinking and then re-starts 6.2L engine slow/rough idle continuously hunting for stable speed (This is the only problem that is NOT intermittent). At times almost dies. A/C unit stuck on "hot" delivering 92 degree air when outside 72 degrees. Temp set at Low. (No A/C just trying to get fresh outside air in). Vehicle was under recall and control modules "reflashed" before purchased (new). Dealer reflashed which did not solve problems. Dealer cannot duplicate (but they only spend a little time looking at the issue). Has been in shop off/on for about 2 weeks attempting to resolve. Issues on occasion still occuring since Mid October 2024 purchase.
NHTSA complaint #11636575 — an unverified report by a vehicle owner.
I tried to buy a car at car dealershipin lafayette oregon ( Pouya Auto sales) gmc sierra 2015 black . on the date 02/09/2023 . They soldme this car with ABS ,cruscontrol, presusre tires ligths on dashbord . the financial bank recomend me to bring the veicule back to the dealership to have them to fixed . . they didnt want to continue with the contract anymore and canseled . now they want to sell the truck to some one else . and is not safe to drive it with this isuuses
NHTSA complaint #11508076 — an unverified report by a vehicle owner.
Neither of the two rear seat head rests stay up. Also, they are too low when extended to full height to protect an adult from head injury in a crash or hard stop. Your head hits the rear glass window. I am 5'-9" tall. The head rest does not lock or remain up in any position. Applying very light pressure to the head rest causes it to drop all the way down. This occurs if you sit in the seat and lean your head back. I'm concerned that someone will be injured if these head rests aren't made to engage and stay in the extended positions. The front rests have a lock button that you must push to lower the head rest. The rear ones do not have this feature. This problem has occurred since the vehicle was new. I mentioned it to the dealer but they said that is how they are designed.
NHTSA complaint #11445706 — an unverified report by a vehicle owner.
-Engine gas consumption state 21 MPG Highway, 17 MPG Combined and 15 MPG City. When I started using this vehicle during the first weeks and months the best MPG I could get at the highway is 18.5 MPG with top tier gas such Shell & Chevron during the first 2 years and now Costco brand. Every since I bought it, the gas MPG have gone down around 0.5 MPG. The vehicle feels that it has to use more gas in order to perform. -The motor oil pump at times moves down from the 40 mark to the 20 when idle at traffic light and when it starts moving, it temporarily moves to the 60 mark. -The transmission is an 8 speed automatic. It has issues shifting to first gear, second gear and times 3rd gear. When driving at slow speeds like in traffic jams, mall parking lots or when you slow down at the traffic light and then turns green and you start accelerating again it feels harsh on gearing down and up, like someone rear ended your vehicle. -This truck has the Active Fuel Management (AFM) and it turns on even slower speeds and you feel how the engine and transmission struggle to really gear up and down. Like it never gears and tries to accelerate at a higher gear. Like in manual transmissions when you accelerate on a higher gear than at correct own it takes forever to reach the needed speed. -Even if all 8 pistons are on it feels as if I am running on a smaller engine like a V6 or V4. -The driver car seat feels that move a little like an 1/8 of an inch. -It just feels that something is wrong with motor and transmission.
NHTSA complaint #11417411 — an unverified report by a vehicle owner.
I'VE HAD MOVEMENT IN MY DRIVERS SEAT SINCE THE DAY I'VE OWNER THE TRUCK. GMC PUT IN A SHIM KIT TO ADDRESS THE PROBLEM BUT IT'S STILL ACTING UP. THEY REFUSE TO REPLACE OR REPAIR ANY FURTHER. ALSO MY TRANSMISSION HAS A HORRIBLE SHIFTING PROBLEM. WHEN IT'S COLD OUT OR AFTER THE FIRST TIME SHIFTING INTO GEAR AFTER SITTING A LONG TIME, THE TRUCK LAGS TO SHIFT INTO GEAR THEN ALL OF A SUDDEN LUNGES FORWARD OR BACKWARDS DEPENDING ON WHICH GEAR I'M IN. I'VE ALMOST RAN THROUGH MY GARAGE DOOR AND SIDE FENCE AND HAD TO SLAM ON THE BRAKES. GMC HAS LOOKED INTO THE ISSUES BUT WON'T RESOLVE THEM. THE LAST 'REPAIR' MADE WAS TO CHANGE OUT THE TRANSMISSION FLUID. THAT HAD HELPED WITH THE HARD SHIFTING WHILE DRIVING BUT THE TRUCK STILL LUNGES FORWARD OR BACKWARDS AND LAGS SHIFTING INTO GEAR. I'VE HAD TO LEARN TO DEAL WITH IT BUT ANYONE ELSE WHO WOULD DRIVE MY TRUCK COULD SERIOUSLY HURT THEMSELVES OR SOMEONE ELSE
NHTSA complaint #11400321 — an unverified report by a vehicle owner.
TL* THE CONTACT OWNS A 2010 GMC SIERRA 1500. THE CONTACT STATED THAT THE STITCHING OF THE FRONT PASSENGER'S SIDE SEAT WAS COMING APART, EXPOSING THE AIR BAG. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS TAKEN TO NILES SALES AND SERVICE (3500 N ROOSEVELT BLVD, KEY WEST, FL 33040) WHERE IT WAS DIAGNOSED WITH THE SEAT NEEDING TO BE REPLACED. THE DEALER INFORMED THE CONTACT THAT THE RECALL WAS ONLY FOR THE FRONTAL AIR BAG REPLACEMENT AND NOT FOR THE AIR BAG IN THE SEAT. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS INFORMED OF THE FAILURE. THE MANUFACTURER REFERRED THE CONTACT TO THE LOCAL DEALER. THE FAILURE MILEAGE WAS APPROXIMATELY 78,000.
NHTSA complaint #11399920 — an unverified report by a vehicle owner.
THE VEHICLE ALWAYS HAS A SMELL OF DAMPNESS AFTER A RAIN. SOMEHOW WATER IS GETTING INTO THE VEHICLE. I HAVE REPLACED THE SEAL AROUND THE THIRD-BRAKE LIGHT WHICH WAS THOUGHT TO BE THE CULPRIT, BUT NO FIX. THE REAR SEAT METAL HAS RUST ON THEM FROM THE DAMP. THE DRIVER'S SEAT CREAKS WHEN MAKING TURNS. IT IS LIKE IT ABOUT TO COME APART. THERE SHOULD BE A RECALL ON THIS. PEOPLE COULD GET HURT IF IT HAPPENS. LE UNDER THE VEHICLE, I NOTICED THAT A BODY-MOUNT IS MISSING UNDER THE DRIVER'S SIDE. THIS COULD BE THE REASONS FOR THE CREAKING. I AM NOT SURE!
NHTSA complaint #11383281 — an unverified report by a vehicle owner.
REACHED FOR A FALLEN OBJECT BETWEEN THE DRIVER AND MIDDLE FRONT SEAT AND THERE IS A RAZOR SHARP PIECE THAT TOOK A LARGE CHUNK OUT OF THE HAND WHICH CAUSED HEAVY BLEEDING AND MEDICAL SUPPLIES TO STOP. THE VEHICLE WAS STOPPED AND JUST TRIED TO RETRIEVE FALLEN OBJECT BETWEEN THE SEATS. THE INCREDIBLY SHARP PARTS NEED TO BE CUT OR REMOVED FROM THIS AND OTHER SIMILAR VEHICLES OR COVERED WITH SOMETHING. IT WAS BARE METAL EXPOSED OUT WITH SHARP EDGES THAT CUT THE RIGHT HAND SO BADLY.
NHTSA complaint #11378245 — an unverified report by a vehicle owner.
MY TRUCK BRAKING SYSTEM IS GOING TO THE FLOOR BOARD OF MY TRUCK. MAKING VERY HARD FOR ME TO STOP. THEY CALL THEMSELVES FIXING IT BUT THE SAME PROBLEM IS BACK. REALLY TIRED OF THIS PROBLEM AND OTHER SPEND 1000.00 ON SPRINGS AND THE VEHICLE WAS ONLY A 1 1/2 OLD WAS TOLD THE WARRANTY ON COVER IT IF THEY WERE BROKEN A LIE THE DEALERSHIP TOLD ME.
NHTSA complaint #11340272 — an unverified report by a vehicle owner.
VEHICLE WAS PARKED IN GARAGE. METAL SUPPORT BAR IN THE BACK UPPER PORTION OF DRIVER SEAT BROKE. SEAT WAS BEING USED AS ORDINARY AND SNAPPED WHEN I WENT TO RETRIEVE ITEM FROM BACK SEAT BY REACH OVER CENTER CONSOLE AND TO BACK SEAT TO GRAB PURSE. I WEIGHT 135 POUNDS AND AM SMALL PERSON. NO EXTRAORDINARY PRESSURE OR WEIGHT SHIFT. I HAVE FOUND NUMEROUS COMPLAINTS ONLINE FROM PEOPLE SEEKING SOLUTIONS ON HOW TO REPAIR THIS EXTREMELY COMMON ISSUE AS TO LEAD ME TO BELIEVE THESE SEATS ARE DEFECTIVE AND DANGEROUS .REFUSE TO DRIVE TRUCK AS NOT CERTAIN THAT SAFETY BELT WILL BE OF ANY USE IN AN ACCIDENT AS SEAT FLOPS AROUND NOW AND HAS AWKWARD TILT BACK TO ONE SIDE ON THE CONSOLE SIDE AND LAYS BACK TO FAR TO CLEARLY SEE OVER DASH EVEN WHEN FULLY POSTURING ERECT.
NHTSA complaint #11316642 — an unverified report by a vehicle owner.
I PURCHASED A GMC SIERRA 2015 REGULAR CAB FROM YOUR COMPANY REPRESENTATIVE, ALJOMAIH AUTOMOTIVE COMPANY IN THE KINGDOM OF SAUDI ARABIA. HOWEVER, AFTER A FEW MONTHS, I DISCOVERED THAT THE VEHICLE HAD SEVERAL DEFECTS, AND IT EXPOSES ITS USERS TO SERIOUS THREAT. AFTER THAT, MINISTRY OF COMMERCE IN KINGDOM OF SAUDI ARABIA HAS MADE SEVERAL CALLSFOR USERS OF THE SAME VEHICLE THAT THEY HAVE TO CHECK WITH THE REPRESENTATIVETO FIX THE DEFECT FOR FREE. HOWEVER, THE REPRESENTATIVE TEMPORIZED AND EVADED, THEN I HAD TO FILE A LAWSUIT AGAINST ALJOMAIH AUTOMOTIVE COMPANY, GENERAL MOTORS’S REPRESENTATIVE IN THE KINGDOM OF SAUDI ARABIA. THE COURT ORDERED THE EXPERTS' DEPARTMENT TO CHECKTHE VEHICLE BY FIVE SPECIALIZED WORKSHOPS, AND REPORTS WERE ISSUED UNANIMOUSLY ON THE FOLLOWING: "THE DEFECT IN THE MENTIONED VEHICLE IS A FACTORY DEFECT, WHICH WAS FOUND IN ALL VEHICLES OF THE SAME TYPE AND NOT ONLY THE MENTIONED VEHICLE". ALSO, I HAVE SUBMITTED REPORT TO THE COURT FROM THE GENERAL MOTORS WEBSITE PROVING THAT THE MENTIONED VEHICLE IS FAULTY WITH THREE OTHER DEFECTS. AS WELL AS, ALL SIX CALLS WERE ISSUED BY THE MINISTRY OF COMMERCE, INCLUDING THE MENTIONED VEHICLE, WITH THE CHASSIS NUMBER.
NHTSA complaint #11297994 — an unverified report by a vehicle owner.
HAD THE HEATED SEATS TURNED ON ONE DAY, ALL OF A SUDED FELT A REALLY HOT SENSATION ON MY LOWER BACK. I TURNED THEM OFF THOUGHT IT WAS JUST GETT TO HOT. GOT IN THE TRUCK A COUPLE OF DAYS LATER. THE HEATED SEAT ELEMENT BURNED A HOLE RIGHT THRU THE LEATHER, EVEN MELTED A SPOT ON MY SWEATER. DEALER SAID THEY HAVE NEVER HEARD OF THIS ISSUE ONLY $800 FOR NEW COVERS AND HEAT ELEMENTS. MY BROTHER HAS A SILVERRODO SAME YEAR, HIS HEATED SEATS STOPED WORKING ALL READY ALSO.
NHTSA complaint #11289850 — an unverified report by a vehicle owner.
TL* THE CONTACT OWNS A 2018 GMC SIERRA 1500. THE CONTACT STATED THAT THE DRIVER'S SEAT MADE POPPING NOISES AND MOVED FROM SIDE TO SIDE WHILE THE VEHICLE MADE TURNS. THE MANUFACTURER ISSUED AN UNKNOWN TECHNICAL SERVICE BULLETIN, BUT IT WAS NOT COVERED UNDER A WARRANTY. THE VEHICLE WAS TAKEN TO COLONIAL BUICK GMC (3965 ATLANTA HWY, LOGANVILLE, GA 30052, (678) 922-9606), BUT THEY REFUSED TO INSPECT THE CONDITION OF THE SEAT. THE DEALER ALSO REFUSED TO NOTIFY THE MANUFACTURER. THE DEALER ACKNOWLEDGED THE SERVICE BULLETIN, BUT CLAIMED THAT THEY COULD NOT DUPLICATE THE FAILURE. THE MANUFACTURER WAS NOT CONTACTED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE MILEAGE WAS 28,000.
NHTSA complaint #11245430 — an unverified report by a vehicle owner.
DRIVERS SEAT MOVES ,SHIFTS WHEN TURNING CORNERS ,HAD IN SHOP 2 TIMES WITH JIM ELLIS GMC MALL OF GEORGIA..THIS HAS BEEN GOING ON SINCE I PURCHASED NEW. NOT FIXED YET..THERE AGAIN TODAY..
NHTSA complaint #11234205 — an unverified report by a vehicle owner.
FIRST WEEK OF OWNERSHIP I NOTICED THAT THE REAR WINDOW HAD A WATER LEAK BY REAR DRIVER SEAT. WHILE INSPECTING THE LEAK, I NOTICE THAT THE PAINT ON THE REAR BRAKE SPOILER ABOVE THE REAR WINDOW HAD TWO BLACK MARKS. BODY SHOP TECHNICIAN RUBBED HIS FINGERS ON THE SPOTS AND PAINT WAS RUBBING OFF. I STARTED TO RECEIVE 'SERVICE STEERING COLUMN LOCK' MESSAGES INTERMITTENTLY AND REGULARLY DURING STARTUP. HEATING INDICATOR LIGHTS FOR ALL THE SEATS DO NOT LIGHT UP TO INDICATE THEIR SETTINGS. THIS OCCURS WHILE VEHICLE IS STATIONARY OR ON THE ROAD. THE REAR BACKUP CAMERA SCREEN TURNS BLUE AND DISPLAYS 'SERVICE REAR BACKUP CAMERA' WHILE REVERSING AND IT OCCURS OCCASIONALLY.
NHTSA complaint #11196063 — an unverified report by a vehicle owner.