11 problems related to suspension have been reported for the 1999 GMC Sierra. The most recently reported issues are listed below.
Odd noise from vehicle. Stopped and noticed the center of the vehicle was low (box and back of cab were in contact at the top and separated by several inches at the bottom. Looked at frame and saw that right side of frame was rusted and is cracked almost all the way through, allowing frame to sag and presenting the danger of frame separation which would cause an accident.
Vehicle has been experiencing ongoing control problems. When traveling at highway speed of 50 mph, vehicle wanders across the road and front end feels loose when driving over bumps in the road, making the vehicle difficult to control. Dealer/manufacturer are aware of the unresolved problem.
From day one there has been a vibration in the truck at 35-45 mph and an at 70 mph. I had front end alignments,tires balance,new tires and new wheels. Still have the problem. Idled roughly at stop lights. Two new fuel pumps in 3 months. Drive seat makes a popping nosie when making a right turn. Service engine soon light comes on for no reason. Accelerator pedal sticks.
On multiple occasions the truck after traveling 6 to 10 miles at 70+ miles per hour would start to violently shake and it would not stop until you came to a complete stop. It started out doing it once a week but got progressively worse until it was doing it every day. It has been to the dealer on 8/5/99, then again the week of 8/23 through 8/27/99, and returned again 9/14/99, they called me back they could not get it to duplicate the problem. I returned to the dealer on 9/16/99 and took the service manager for a ride and just like before after traveling 7 miles at 72 miles per hour the truck began to violently shake with him being the third witness besides myself. The truck is still at the dealership as of 10/27/99 and I think it needs to be filed as a lemon under the nc general statute 20-351, so that no one else ends up with it or gets hurt or killed in an accident.
On multiple occasions the truck after traveling 6 to 10 miles at 70+ miles per hour would start to violently shake and it would not stop until you came to a complete stop. It started out doing it once a week. But got progressively worse until it was doing it every day. It has been to the dealer on 8/5/99, then again the week of 8/23 through 8/27/99, and returned again 9/14/99. They called me back, and they could not get it to duplicate the problem. I returned to the dealer on 9/16/99 and took the service manager for a ride. Just like before after traveling 7 miles at 72 miles per hour the truck began to violently shake with him being the third witness besides myself. The truck is still at the dealership as of 10/19/99 and I think it needs to be filed as a lemon under the nc general statute 20-351, so that no one else ends up with it or gets hurt or killed in an accident.
Consumer experiences vibration when driving. Whenever turning there's always squeaking in the left front and the right rear. Whenever straightening out, at times there is a loud popping noise coming from the front end. Consumer says it sounds like the stablizer bar in the front failed. Dealer counld not stop the vibration when taken in on Feb. 5, 1999. So they put new tires on Feb, 26 1999, problem presists.
While drving vehicle at various speeds & hit a bump, there is a severe vibration in the steering wheel. Controling vehicle is difficult when this occurs.
While driving 55 mphe entire vehicle severly vibrates. Also transmission shifts. Cause unknown. Please give any further details.
When driving at highway speeds there is excessive vibration in the body of the vehicle. Dealer has seen and are not able to fix.
Entire vehicle vibrates/shakes excessivelly at highway speeds (60-75 mph), on certain streches of road.
Vehicle will vibrate and hop off the road when it is being driven at high speeds and over bumps, causing loss of control.