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:
94,965 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.

2004 GMC Sierra 1500 engine problems

engine problem

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2004 GMC Sierra 1500 Owner Comments

problem #3

Aug 152014

Sierra 1500

  • 76,400 miles


The contact owns a 2004 GMC Sierra 1500. While driving approximately 65 mph, the vehicle suddenly stalled. During the failure, the temperature gauge reading was high and steam appeared from under the hood. The dealer stated that the engine cylinder head was cracked. The vehicle was not repaired and the manufacturer was not notified. The failure mileage was 76,400.

- West Newton, PA, USA

problem #2

Jan 032014

Sierra 1500 8-cyl

  • 112,000 miles
Cracked cylinder heads, also known as castech head casting #706 these heads crack on the engine cause antifreeze to mix with the oil and destroy the engine, I have contacted GM and they will do nothing for me, even though there has been lawsuits and its a very well known problem with the vortec 4.8 and 5.3L GM engine.

- Oxford, ME, USA

problem #1

Aug 112012

Sierra 1500

  • 96,494 miles
Exhaust manifold bolts broke off causing the drivers side heat shield to fall and jam under the steering linkage. This caused me to almost drive off the road. I had to force the steering wheel to get the vehicle to turn.

- Rockford, IL, USA

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