Vehicle Speed Control Problems of GMC Sonoma

Consumer complained of vehicle handling problems since 5000 miles. Consumer took vehicle to the dealer at least 9-10 times. There was a popping sound in the front end. Consumer had the lower ball joints replaced, and believed the upper ball joints were still bad. Also, there was excessive play in the steering box. This was causing excessive wear on the tires. With any wind the vehicle was blown around. The service writer at the dealership said they didn't want to fix the problem because they were afraid it would make the problem worse, but it was not stated on the service repair sheet. At one point lock tight was put on the bolts to keep them from coming loose. The manifold gasket and thermostat was replaced. On one occasion the vehicle lurched forward, there was a squealing noise coming from the brakes.

See all problems of the 2003 GMC Sonoma 🔎.

While driving at any speed and when applying the brakes vehicle surged forward before braking. Vehicle had been to the dealer eight times for this problem. The dealer was unable to find what was causing this problem.

When driving at an undetermined speed vehicle surged forward. Consumer took the vehicle to the dealership for inspection but they were unable to resolve the problem.

See all problems of the 2001 GMC Sonoma 🔎.

Started off with a sudden failure to accelerate on highway then corrected itself; on and off for a few weeks. Discovered that brake pedal was soft and was failing to return to starting position; replaced master cylinder to eliminate soft pedal but still sticking and not returning to starting position. Cannot find cause.

See all problems of the 1998 GMC Sonoma 🔎.

Vehicle starts w/ a jerk when accelerator is depressed from a stop. This is a common problem, with many needing an expensive replacement at low vehicle milages. Customer should not be required to pay for this update because of a design flaw.

See all problems of the 1997 GMC Sonoma 🔎.

Just pulled into the main street, drove a way down the road, and because brakes did not catch, rear ended another automobile. Brake pedal went to the floor. Also, while braking the engine was racing, which made it harder for auto to slow down.

Engine accelerates on its own at times while vehicle is in motion. If the clutch is disengaged during the failure, the engine wll run around 3000 rpm for approx. 15 seconds before it returns to normal idle. Dealer claims no codes and engine is operating to specifications. They test drove and could not duplicate the problem. Their statement to me was " we can not fix it if we do not know what to fix". I asked them if they had called GMC to trouble shoot the problem and their reply was yes and they did not know and had no other reports of this problem. I picked the truck up from the dealer on 9/21 and drove it on 9/22 around town with no problem. Then on 9/23 after a 3 stop shopping trip, the truck incured the same problem as before. My dealer has offered to keep the truck for a couple of days of test driving but I am affraid that they will not be able to duplicate the problem since they drove it 60 miles the first time they had it.

Transmission is slipping out of gear and drops into neutral for 1-2 seconds, and then goes back into gear, causing a revving in engine. Consumer contacted dealer in July 2000, but could not determine cause. Currently, consumer is having problems with transmission sticking in gear. Same dealer claims transmission needs to be replaced. Consumer states stuck gear resulted in an engine brake condition in a reduced speed zone where vehicle speed is suddenly reduced with no brake lights on, consumer found TSB 99-07-30-005 regarding this problem and stated the recommendation was to replace the valve body assembly, however this was not been done until the valve body assembly failed which caused 3rd gear to lock on the highway, consume rwants gm to take responsibility for this problem.

When driving at 50 mph and applying the brakes, brakes went straight to the floorboard. Also, pulley came off, causing the consumer to pull over. Vehicle accelerated, and the consumer had to pull over and shut the igintion switch off.

See all problems of the 1996 GMC Sonoma 🔎.

Vehicle will accelerate without throttle demand from operator; vehicle is capable of sustaining speed with no decelleration.

When vehicle is in or out of gear engine idles, rpm will flucuate between 1600-3000 intermittently. Dealer ehas replaced idle motor, throttle positioner, new computer , and new software for computer. After several attempts to correct defect, dealer is claiming it is normal.

See all problems of the 1999 GMC Sonoma 🔎.