109 of the 1,739 complaints filed about the GMC Sonoma are about the transmission — 6% of everything owners reported. The worst model year for it is 1996.
109
Complaints
6%
Share of all complaints
3
Crashes
1
Fires
POWER TRAIN
THE FOOT OPERATED PARKING BRAKE BROKE UNDER NORMAL WEAR AND TEAR. I HAD ESTIMATES THAT WERE WELL OVER $300 TO FIX, AND HAVE NOT YET HAD WORK DONE. I ONLY PARK ON LEVEL ROADS AND HOPE TRANSMISSION WILL HOLD IN PARK. I FEEL THIS MUST BE A DEFECTIVE PART.
NHTSA complaint #10648632 — an unverified report by a vehicle owner.
POWER TRAIN
MY TRUCK RADIATOR STARTED TO SMELL AS IF IT HAD A LEAK. I TOOK IT TO A RADIATOR SHOP. THIS SHOP HAPPENS TO BE VERY CLOSE TO THE GM PLANT IN DAYTON, OHIO. THE MAN TOOK ONE LOOK AT THE TRUCK. HE EXPLAINED TO ME THAT ALL THE RADIATORS FOR THIS TRUCK FROM THE 2001 YEARS WERE SENT TO HIM PRIOR TO INSTALLING. HE SAID THEY HAD BEEN LEFT OUTSIDE FOR A PERIOD OF TIME AND ALL OF THEM HAD TO BE CLEANED OUT BECAUSE OF HEAVY RUST. HE STATED MINE MUST OF BEEN MISSED. THE RUST IN THE RADIATOR WAS SO THICK IT WAS LIKE MUD! HE REPLACED THE RADIATOR, HOSES AND EVEN HAD TO REPLACE THE RADIATOR FLUID RESERVOIR BECAUSE IT LITERALLY HAD INCHES OF RUST IN IT. THIS IS SOMETHING THE COMPANY KNEW ABOUT AND I SHOULD NOT OF HAD TO REPLACE IT. THE NEXT THING TO HAPPEN IS TO THE DRIVE TRAIN. THE TRUCK IS MAKING A WHINING NOISE - SOUNDS LIKE SOME TIRES DO. WE HAVE TAKEN IT TO SEVERAL PLACES TO REPAIR AND NO ONE CAN FIGURE OUT WHAT IS CAUSING THE SOUND. WE HAVE REPLACED SO MANY PARTS, MANY OF THEM MORE THAN ONCE IN A SHORT PERIOD OF TIME. I HAVE PUT OVER $3000 OF WORK IN THE TRUCK JUST OVER THE LAST MONTH AND AM NOT YET FINISHED. THE BRACKETS HOLDING THE REAR SUSPENSION IN PLACE ARE CRUMBLING IN MY HAND. THE MUFFLER IS LEAKING. IT IS STALLING FOR NO APPARENT REASON. AND IS IDLING VERY FAST EVEN THO IT HAS HAD REGULAR TUNE UPS AND MAINTENANCE. THE TAILGATE IS BROKEN - YOU CAN JUST PULL IT OFF THE TRUCK. THIS IS NOT NORMAL WEAR AND TEAR. THE WHINING CONTINUES WHENEVER IT IS BEING DRIVEN. WHATEVER HAPPENED TO COMPANIES BEING RESPONSIBLE FOR THE QUALITY OF THE VEHICLE! GOD KNOWS MOST OF US CANT BUY A NEW ONE AT $35,000+ TO.
NHTSA complaint #10524047 — an unverified report by a vehicle owner.
POWER TRAIN:DRIVELINE
I WAS DRIVING MY HUSBANDS 2001 GMC SONOMA FROM OHIO BACK TO FLORIDA WHEN THE DRIVESHAFT SNAPPED AND PUNCTURED A HOLE IN THE FUEL TANK AND MUFFLER. THIS EVENT LED TO US HAVING TO REPLACE THE REAR DRIVESHAFT, FUEL TANK, AND HE REPAIRED THE MUFFLER. WE RESEARCHED GMC DRIVESHAFT FAILURES ON LINE AND DISCOVERED THAT THERE WERE MANY COMPLAINTS ABOUT THE DRIVESHAFT BREAKING.
NHTSA complaint #10291037 — an unverified report by a vehicle owner.
POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT
TL*THE CONTACT OWNS A 2003 GMC SONOMA. IN JUNE OF 2004, THE DIFFERENTIAL WAS FAILING AND THE PAINT WAS DETERIORATING ON THE VEHICLE. THE CONTACT ATTEMPTED TO REPAIR THE VEHICLE HIMSELF, BUT THE PART WAS UNAVAILABLE. THE MANUFACTURER ADVISED HIM TO HAVE THE VEHICLE DIAGNOSED. THE CONTACT FEELS THAT THE PART SHOULD BE AVAILABLE AND IS NOT WILLING TO PAY FOR A DIAGNOSTIC. THE FAILURE MILEAGE WAS 45,000 AND CURRENT MILEAGE WAS 65,000. UPDATED 5/14/09 *CN UPDATED 05/14/09.
NHTSA complaint #10267138 — an unverified report by a vehicle owner.
POWER TRAIN:DRIVELINE:DRIVESHAFT
THERE HAD BEEN A WHINING(LIKE THE OLD RADIAL TIRES USED TO MAKE) NOISE FOR ABOUT A WEEK AND I JUST FIGURED IT WAS THE TIRES. IT GOT LOUD ON 8/24 AND I STOPPED AND PUT IT IN PARK, AS I GOT OUT TO LOOK UNDER THE TRUCK, IT STARTED ROLLING AND ROLLED DOWN INTO THE WOODS, WE HAVE FILED A POLICE REPORT AND REPORTED TO THE INSURANCE COMPANY. WE ARE TRYING TO MAKE ARRANGEMENTS TO GET THE TRUCK OUT. THE DRIVE SHAFT WAS LYING WHERE THE TRUCK WAS PUT IN PARK.,,ALTHOUGH THE PARK DID NOT HOLD. THE DRIVE SHAFT TWISTED AND SPLIT,,,EXPLODED BY THE LOOKS OF IT. I HAVE PICTURES OF THE DRIVE SHAFT.
NHTSA complaint #10200749 — an unverified report by a vehicle owner.
POWER TRAIN:DRIVELINE:DRIVESHAFT
WHILE DRIVING ON THE PA TURNPIKE THE DRIVESHAFT FELL OUT OF THE BOTTOM OF THE TRUCK AND DENTED VARIOUS PARTS UNDERNEATH THE TRUCK. AFTER HAVING THE DRIVESHAFT REPLACED A CLICK STILL OCCURRED WITH THE BACK OF THE TRUCK. THE MECHANIC BELIEVED IT WAS A PROBLEM WITH THE ENTIRE BACK AXLE.
NHTSA complaint #10193549 — an unverified report by a vehicle owner.
POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT
WHILE DRIVING ON THE PA TURNPIKE THE DRIVESHAFT FELL OUT OF THE BOTTOM OF THE TRUCK AND DENTED VARIOUS PARTS UNDERNEATH THE TRUCK. AFTER HAVING THE DRIVESHAFT REPLACED A CLICK STILL OCCURRED WITH THE BACK OF THE TRUCK. THE MECHANIC BELIEVED IT WAS A PROBLEM WITH THE ENTIRE BACK AXLE.
NHTSA complaint #10193549 — an unverified report by a vehicle owner.
POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT
PASSENGER AND DRIVER SEATS IN MY 2000 GMC SONOMA HAVE SEAT POSITIONING CONTROLS AND LOCKING MECHANISIMS THAT DO NOT ALWAYS LOCK PROPERLY AND/OR GET JAMMED UP AND HAVE BROKEN. A FRIEND WAS SITTING IN THE PASSENGER SEAT AND IT FAILED TO LOCK INTO PLACE TO KEEP IT FROM SLIDING FORWARD. I ADJUSTED THE BOLTS THAT FASTEN THE SEAT TO THE FLOOR OF THE VEHICLE TO HELP 'REALIGN' THE SEAT FRAME SO THAT THE MECHANISM THAT KEEPS THE SEAT FROM SIDING FRONT AND BACK WOULD KEEP THE SEAT LOCKED INTO POSITION ONCE THE SEATING DISTANCE IS SET. ALSO, THE RECLINING HANDLE ON THE PASSENGER SIDE BROKE OFF, NOT ALLOWING FOR SEAT BACK SUPPORT ANGLE ADJUSTMENT ON THE PASSENGER SIDE. THE DRIVER'S SIDE SEAT BACK SUPPORT ADJUSTMENT LEVER OFTEN 'STICKS' OR 'LOCKS' INTO POSITION....NOT ALLOWING FOR SEAT BACK REST ADJUSTMENT. REAR DIFFERENTIAL SOMETIMES LOCKS UP AND OR SLIPS AND SHAKES AND MAKES NOISE...ESPECIALLY WHEN SIDEWAYS FORCE IS APPLIED...SUCH AS WHEN TURNING IN A CURVE OR CIRCULAR FASHION WITH THE VEHICLE IN MOTION. BOTH TAILGATE SUPPORT CABLES BROKE ON THE TRUCK. FRONT DRIVER'S SIDE BEARING HAD EXCESS WEAR AND HAD TO BE REPLACED AT 65 000 KM. DRIVER'S SIDE WIPER ARM GOT DISLODGED FROM THE SHAFT THAT TURNS IT AND WAS KNOCKED OUT OF POSITION ON 2 OCCASIONS. POWER STEERING FAILS FOR SHORT INTERMITTENT PERIODS WHEN THE VEHICLE IS FIRST STARTED FROM A 'COLD' AND 'WARM' STATE AND THE STEERING BECOMES STIFFER AND LESS RESPONSIVE. MOST NOTICABLE AT SLOWER VEHICLE SPEEDS.
NHTSA complaint #10185417 — an unverified report by a vehicle owner.
POWER TRAIN:AUTOMATIC TRANSMISSION
I AM THE ORIGINAL OWNER OF A 1998 GMC SONOMA PURCHASED NEW IN FEBRUARY OF 1999. VEHICLE PROPERLY MAINTAINED DRIVEN AS A COMMUTER VEHICLE APPROXIMATELY 7,400 MILES PER YEAR. IT IS EQUIPPED WITH THE 4L60E TRANSMISSION, WHICH IS CLEARLY DEFECTIVE. 59,000 MILES BEGINS TO SURGE AND SLIP. ACCELERATION IS GREATLY REDUCED WITH HARSH SHIFTING. GREATLY COMPROMISING MY SAFETY. ENTIRE TRANSMISSION NEEDS TO BE REPLACED AT A COST OF $3100.00 GMC WILL NOT REIMBURSE REPAIRS TO MY VEHICLE. MY CLAIMS WERE "DENIED" BY THE DISTRICT REPRESENTATIVE.
NHTSA complaint #10183854 — an unverified report by a vehicle owner.
POWER TRAIN:CLUTCH ASSEMBLY
TL* - THE CONTACT WAS DRIVING ON THE FREEWAY AT APPROXIMATELY 65 MPH WHEN HIS CLUTCH FAILED ON HIS 2002 GMC SONOMA. THE ROAD CONDITIONS WERE WET. THE CLUTCH STOPPED ENGAGING, THE ENGINE WAS REVVING BUT NONE OF THE GEARS WOULD ENGAGE. THE CONTACT HAD THE VEHICLE TOWED TO HIS HOME. THE TOW DRIVER SAID HE COULD SMELL THE CLUTCH BURNING. THE CONTACT CHECKED THE CLUTCH FLUID THE NEXT MORNING AND 3/4 OF IT WAS MISSING. THE CONTACT HAD THE VEHICLE TOWED TO A CLUTCH REPAIR SHOP. THE VEHICLE WAS REPAIRED. THE CONTACT WAS SHOWN THE FLYHEEL THAT MELTED. THE FORD DEALER TOLD THE CONTACT THE CLUTCH BURNED OUT DUE TO NORMAL WEAR AND TEAR.
NHTSA complaint #10177862 — an unverified report by a vehicle owner.
POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
PURCHASED TRUCK IN 2006. MILEAGE AT 48,000. TROUBLE STARTING, FUEL PUMP REPLACED. OIL COOLING LINES REPLACED. SUBSEQUENTLY, AUTOMATIC TRANSMISSION SLIPS FROM 2 WD TO 4 WD FOR NO APPARENT REASON. I HAVE NOTICED THAT THIS PROBLEM OCCURS WHEN ACCELERATOR IS NOT DEPRESSED, AND WHEELS ARE TURNED, TO TURN A CORNER OR TO TURN INTO/OUT OF A DRIVEWAY. USUALLY THERE IS A DEPRESSION IN PATH AS WELL, I.E. CURB/DIP AT DRIVEWAY ENTRANCE, POTHOLE, ETC. ENGINE IS NOT ALWAYS COLD; SOMETIMES SHIFTS AT END OF TRIP, SOMETIMES AT BEGINNING, NO ADVERSE WEATHER CONDITIONS.
NHTSA complaint #10168398 — an unverified report by a vehicle owner.
POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT
IT HAS BEEN DETERMINED THAT WATER HAS CONTAMINANTED THE OIL IN THE REAR DIFFERENTIAL CAUSING A MECHANICAL FAILURE. I HAVE BEEN INFORMED THAT MY EXTENDED WARRANTY DOES NOT COVER THIS ISSUE EVEN THOUGH GMC IS AWARE THAT PROBLEM WITH A VENT TUBE LOCATION IS ONE SOURCE FOR WATER INFILTRATION. I HAVE A GMC DOCUMENT WITH SPECIFIC INSTRUCTIONS FOR MECHANICS TO CHECK FOR THE IMPROPER VENT TUBE LOCATION IF WATER IS INDEED FOUND IN THE REAR AXLE FLUID.
NHTSA complaint #10154676 — an unverified report by a vehicle owner.
POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT:SEAL
IT HAS BEEN DETERMINED THAT WATER HAS CONTAMINANTED THE OIL IN THE REAR DIFFERENTIAL CAUSING A MECHANICAL FAILURE. I HAVE BEEN INFORMED THAT MY EXTENDED WARRANTY DOES NOT COVER THIS ISSUE EVEN THOUGH GMC IS AWARE THAT PROBLEM WITH A VENT TUBE LOCATION IS ONE SOURCE FOR WATER INFILTRATION. I HAVE A GMC DOCUMENT WITH SPECIFIC INSTRUCTIONS FOR MECHANICS TO CHECK FOR THE IMPROPER VENT TUBE LOCATION IF WATER IS INDEED FOUND IN THE REAR AXLE FLUID.
NHTSA complaint #10154676 — an unverified report by a vehicle owner.
POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT
DT: CONTACT STATES ABOVE THE REAR END DIFFERENTIAL THERE IS A VENT TUBE PLACED BETWEEN WHERE THE TRUCK BED STOPS AND THE CAP STARTS, AND THERE IS ABOUT 1 -1/2 INCH SPACE LEFT BETWEEN. THIS SPACE LETS WATER COLLECT, RUNNING DOWN THE TUBE, DESTROYING THE OIL, AND CAUSING THE LUBRICATION ON THE REAR END DIFFERENTIAL TO BE DESTROYED. A TECHNICAL SERVICE BULLETIN FOR SEPTEMBER 2004 DISCUSSES THE SAME COMPONENT.*AK THE REAR SEAL HAD BLOWN OUT WHICH CAUSED GREASE TO ESCAPE. THE CONSUMER WAS TOLD THE ENTIRE REAR END INCLUDING THE AXLE BEARING AND SEALS HAD TO BE REPLACED.
NHTSA complaint #10125513 — an unverified report by a vehicle owner.
POWER TRAIN:AUTOMATIC TRANSMISSION
2001 4WD 4.3 GMC SONOMA, 53K MILES, NO KNOWN EVENTS LEADING TO FAILURE, WITHOUT WARNING TRANSMISSION FAILURE, LOSS OF FIRST GEAR AND REVERSE, ALMOST CAUSED ACCIDENT DO TO UNEXPECTED DECELERATION. I HAVE REPLACED TRANSFER CASE (WHERE IT WAS MAKING MUCH NOISE) BUT THIS DID NOT CORRECT PROBLEM. BY FAR THIS TRUCK IS NOT "PROFESSIONAL GRADE" AS THEIR ADVERTISING CLAIMS!
NHTSA complaint #10121798 — an unverified report by a vehicle owner.
POWER TRAIN:AUTOMATIC TRANSMISSION
I HAVE A 2001 GMC SONOMA WHICH WAS BOUGHT NEW IN 2002. THE VEHICLE HAS 78K MILES ON IT. AT FIRST THE VEHICLE WOULD HAVE TROUBLE STARTING. THEN THE TRANSMISSION WOULD SLIP WHEN DRIVEN COLD. AFTER THE SERVICE ENGINE LIGHT CAME ON, A CODE INDICATED THAT THERE WERE TWO SHIFT SOLENOID MALFUNCTIONS. BOTH SHIFT SOLENOIDS WERE REPLACED. THAT TWO DAYS AGO. TODAY THE TRUCK STARTED UP, SO THE VEHICLE WAS ASSUMED SAFE TO DRIVE. I WAS TRAVELING DOWN A BUSY ROAD AT ABOUT 40 MPH, WITH AN 18 WHEELER TRACTOR TRAILER BEHIND ME, WHEN THE VEHICLE, WITHOUT ANY INDICATION OF MALFUNCTION, SHIFTED FROM OVERDRIVE TO FIRST GEAR (IT IS AN AUTOMATIC) THUS RESULTING IN AN "ENGINE BRAKING" EFFECT WIHICH SLOWED THE VEHICLE DOWN TO ABOUT 25 MPH. THIS WAS VERY SCARY AND LUCKILY THE VEHICLES BEHIND ME REALIZED THAT THERE WAS A PROBLEM AND HAD ENOUGH ROOM TO SLOW DOWN. THOUGH THE PROBLEM IS NOT YET KNOWN, IT SEEMS LIKE THERE ARE ALOT "SERVICE BULLETINS" FOR THIS VEHICLE AND ITS CORPORATE COUSIN, THE CHEVY S-10. HOPEFULLY, THIS PROBLEM IS SOLVED BEFORE SOMEONE IS KILLED FROM THE FAILURE. I WILL KEEP YOU POSTED ON WHAT PARTS WERE REPLACED/REPAIRED FROM THE DEALER.
NHTSA complaint #10119694 — an unverified report by a vehicle owner.
POWER TRAIN:AUTOMATIC TRANSMISSION
1999 GMC SONOMA EXPERIENCED PROBLEMS WITH TRANSMISSION, CD PLAYER, TIRES AND HEATING COIL.*MR CONSUMER CONCERNED THAT DEALER DID NOT TELL THEM THAT THERE WAS A RECALL ON THIS VEHICLE. THE TRANSMISSION WAS REPLACED, EXCHANGED REBUILT TORQUE CONVERTER WITH TRANCES FILLER 12 MONTH OR 12,000 MILE WARRANTY. *BF
NHTSA complaint #10118892 — an unverified report by a vehicle owner.
POWER TRAIN
WE HAVE A 1997 GMC SONOMA WITH A VOTREC 4.3 X. OVER 2 YEARS AGO, WE STARTED GETTING MISFIRES. WE TRIED EVERYTHING WE COULD THINK OF, TO NO AVAIL. IN THE PAST MONTH I'VE PUT OVER $500 ALONE. I HAVE BEEN LOOKING IT UP ON-LINE, AND HAVE REALIZED, I'M NOT THE ONLY ONE WITH THIS ISSUE. THERE HAS EVEN BEEN A RECALL IN CALIFORNIA, BUT ONLY THERE. GM TOLD ME THEY HAVE DIFFERENT GAS OUT THERE. ANOTHER MAJOR SAFETY ISSUE HAS BEEN THE WIPER MOTOR FAILURE, THAT HAD A RECALL. GM TOLD ME MY VIN # WAS NOT ON THE LIST, BUT I BATTLE MY WIPERS AT LEAST ONCE A MONTH. I HAVE TO YANK THE BLADES HALF WAY UP THE WINDOW BEFORE THEY GRAB AND START TO WORK. ONE MORE PROBLEM THAT I NOW KNOW I AM NOT ALONE ON IS THE ISSUE WITH DEX-COOL. WE HAVE FLUSHED AND REFILLED THE SYSTEM AT LEAST THREE TIMES, ONLY TO HAVE IT GUNK-UP AGAIN. PLEASE HELP ME AND ALL THE OTHER CUSTOMERS WHO GOT TRAPPED WITH JUNK VEHICLES. WE HAVE HAD TOO MANY OTHER FAILURES TO COUNT!
NHTSA complaint #10116406 — an unverified report by a vehicle owner.
POWER TRAIN:MANUAL TRANSMISSION
WE HAVE A 1997 GMC SONOMA WITH A VOTREC 4.3 X. OVER 2 YEARS AGO, WE STARTED GETTING MISFIRES. WE TRIED EVERYTHING WE COULD THINK OF, TO NO AVAIL. IN THE PAST MONTH I'VE PUT OVER $500 ALONE. I HAVE BEEN LOOKING IT UP ON-LINE, AND HAVE REALIZED, I'M NOT THE ONLY ONE WITH THIS ISSUE. THERE HAS EVEN BEEN A RECALL IN CALIFORNIA, BUT ONLY THERE. GM TOLD ME THEY HAVE DIFFERENT GAS OUT THERE. ANOTHER MAJOR SAFETY ISSUE HAS BEEN THE WIPER MOTOR FAILURE, THAT HAD A RECALL. GM TOLD ME MY VIN # WAS NOT ON THE LIST, BUT I BATTLE MY WIPERS AT LEAST ONCE A MONTH. I HAVE TO YANK THE BLADES HALF WAY UP THE WINDOW BEFORE THEY GRAB AND START TO WORK. ONE MORE PROBLEM THAT I NOW KNOW I AM NOT ALONE ON IS THE ISSUE WITH DEX-COOL. WE HAVE FLUSHED AND REFILLED THE SYSTEM AT LEAST THREE TIMES, ONLY TO HAVE IT GUNK-UP AGAIN. PLEASE HELP ME AND ALL THE OTHER CUSTOMERS WHO GOT TRAPPED WITH JUNK VEHICLES. WE HAVE HAD TOO MANY OTHER FAILURES TO COUNT!
NHTSA complaint #10116406 — an unverified report by a vehicle owner.
POWER TRAIN:AUTOMATIC TRANSMISSION
WHILE DRIVING, THE CONSUMER HEARD A WINDING NOISE COMING FROM THE FRONT OF THE VEHICLE. WHILE SHIFTING THE TRANSMISSION HESITATED, THEN DOWN SHIFTED ON ITS OWN. THE CONSUMER DROVE IT TO A TRANSMISSION SHOP. THE MECHANIC INFORMED THE DRIVER THAT THE TRANSMISSION NEEDED TO BE REPLACED. PLEASE FILL IN ADDITIONAL INFORMATION.
NHTSA complaint #10097310 — an unverified report by a vehicle owner.