Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
65,500 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2001 GMC Sonoma transmission problems

transmission problem

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2001 GMC Sonoma Owner Comments

problem #2

Mar 152005

Sonoma 4WD 6-cyl

  • Automatic transmission
  • 53,000 miles


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!

- Richwood, OH, USA

problem #1

May 022005

Sonoma 4-cyl

  • Automatic transmission
  • 78,000 miles
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.

- Corona, CA, USA

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