10.0
really awful- Crashes / Fires:
- 0 / 0
- Injuries / Deaths:
- 0 / 0
- Average Mileage:
- 0 miles
About These NHTSA Complaints:
The NHTSA is the US gov't agency tasked with vehicle safety. Complaints can be spread across multiple & redundant categories, & are not organized by problem. See the Back button — blue bar at the very top of the page — to explore more.
Consumers states the vehicle had a major failure to occur with the cylinder head. GMC has declined to respond to consumers inquiries. Consumer has all the parts and would like reimbursement for the metal failure.
- Avon Lake, OH, USA
Cylender head cracked, causing leaking. Dealer was notified.
- Avonlake, OH, USA
The remote oil filter adapter on this vehicle is made of aluminum and the mounting bolts are steel. Any kid that passes science class can tell you that these two metals together will cause a bi-metallic reaction that will severely and quickly corrode the aluminum, which it has. This corrosion has caused the mounting holes on the adapter to flake off and now only a small portion of the mounting bolt/nut is holding the assembly. Eventually, the mount will completely fail and the adapter may fall into some moving engine part or onto the road. This could sever the oil filter hoses and possibly spray oil on the hot engine which is a fire risk. This oil filter adapter should be made out of materials that are compatible and will not corrode from bi-metallic reaction.
- State College, PA, USA
Cylinder head gasket failed. Caused coolant to leak into the engine block. This loss of engine coolant caused engine damage.
- Sterling Heights, MI, USA
The 1st transmission failed at 55311 miles on 8/12/99. Replaced with another transmission and failed on 01/04/2001 with 75121 miles on it. Head gasket replaced on 01/05/98 with 33229 miles. Repair cylinder head and lifters on 08/04/98 with 40905 miles. Replaced crankshaft and bearings on 09/28/98 with 42917 miles. Replaced engine on 06/05/99 with 53755 miles on it. Lot of mechanical braekdown.
- Medina, OH, USA
Auto has been losing coolant. Took to GMC dealship repair service 99 they replaced radiator hoses. Six months later coolant was found dirty had a flush. 3mos later the samething took back to dealship they replaced heater hoses and thermosta, two weeks later stilling leaking this time was told cylinder head cracked at center bolt hole and leaking coolant internally, this time they replace cracked cylinder head and gasket set. This vehicle has never I mean never ran hot nor did it show any signs of having ran hot.. was told by dealership 1995 sunfires and 1996 Sonoma with the same engine had same problems but my 1995 Sonoma was never added to bulletion.
- Webster, TX, USA
The head gasket failure caused coolant to leak.
- Anderson, IN, USA
Vehicle has had 3 head gaskets during it's 18,000 miles, consumer fells it should be recalled. Nlm
- Middleton, MA, USA
Head gaskets failed on vehicle at 90,000 miles causing me to to replace the whole engine of my truck. Mechanic and many people I spoke with have stated that they have not seen a 95 Sonoma engine last past 100,000.
- Fowlerville, MI, USA
The head gasket of the engine has blown out causing a coolent leak on the back side of the engine. The mechanic at the local dealership has made the statement that he has seen 5 or 6 other vehicles with the same engine have the same problem with the head gasket blowing out. The leak started off small but has gotten progressively worse over the last four months. If this is true at all the other dealerships, this seems to be a high failure rate for this type of engine.
- Hinckley, IL, USA
Cooling system fan belt has a lot of play in it, and engine head gasket has been leaking for two years. Both problems fixed under warranty.
- East Windsor, CO, USA
Engine oil leak.
- Long Beach, CA, USA
- Avon Lake, OH, USA