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:
62,922 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.

2002 GMC Sierra 1500 transmission problems

transmission problem

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2002 GMC Sierra 1500 Owner Comments

problem #3

Mar 272008

Sierra 1500 8-cyl

  • Automatic transmission
  • 36,193 miles


GM technical bulletin 00-07-30-022C (automatic transmission) failure of reaction sun gear with only 36, xxx miles (2002 GMC Sierra 1500 4.8L). This appears to have been a problem for at least a decade with continual failures until GM upgraded the defective components in 2003. Repair estimates could be over $2,000. Cash available = $200. GM should take responsibility for known defective parts.

- Lake Elsinore, CA, USA

problem #2

Jul 082006

Sierra 1500 8-cyl

  • Automatic transmission
  • 68,994 miles
At 68,994 miles my truck lost 2nd gear, drive, overdrive and reverse. A new reaction shell was installed. At 90,027 miles and 360 days later the same problem occurred and a beast heavy duty reaction shell was available and installed.

- Imlay City, MI, USA

problem #1

Dec 082003

Sierra 1500 8-cyl

  • Automatic transmission
  • 83,579 miles
On Dec 8, 2003 I was driving at approx. 45 miles per hour when my transmission shifted out of gear and then after a few secounds it shifted into low gear, all on its own. There was a car traveling behind that almost hit me from behind. I pulled over and put my truck in park. I looked under my truck to see if any thing had come apart. I did not see any fluid leak or any loose parts. I drove my truck to the dealership in low gear. They took my truck in for repairs (38,127 miles). I was 2,127 miles out of warranty. The transmission was repaired and it cost $1,057.19. Today 3/30/05 on my way home from work the transmission does the same thing. I only have low gear and no reverse. This time I was lucky that no one was behind me when it happened.

- Morse, LA, USA

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