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.


definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
30,000 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.

2006 GMC Sierra 2500 cooling system problems

cooling system problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2006 GMC Sierra 2500:

Unsubscribe any time. We don't sell/share your email.

2006 GMC Sierra 2500 Owner Comments

problem #1

Dec 152010

Sierra 2500 4WD 8-cyl

  • 30,000 miles


I have a 2006 GMC Sierra 2500 with the lbz duramax and allison transmission. Two of the transmission coolant lines began leaking transmission fluid at the crimp ends in Dec of 2010. The truck only had 30,000 miles, but was the 36 month warranty period. Service under warranty was denied. An on-line search reveals several others have complained about this issue and that the dealer installed oem replacement lines are no better (developing leaks soon after replacement), yet no tsb or corrective action has been issued by GM. Leaking transmission fluid is a fire and environmental hazard. The leaks are getting worse.

- Muskegon, MI, USA

Search for these popular complaint phrases...

Not what you are looking for?