hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
79,100 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 2500 engine problems

engine problem

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2004 GMC Sierra 2500 Owner Comments

problem #5

Aug 282018

Sierra 2500

  • 105,000 miles


Exhaust manifold bolts broken

- Cherry Tree, PA, USA

problem #4

Nov 262016

Sierra 2500

  • 112,000 miles
The contact owns a 2004 GMC Sierra 2500. The contact stated that the vehicle had a massive oil leak. The vehicle was taken to the dealer where it was diagnosed that the fuel injectors were defective, which filled the crankcase full of fuel and was a known issue. The vehicle would have been repaired per an extended warranty; however, it fell outside of the parameters of the extended warranty, increasing the risk of an engine compartment fire. The manufacturer was notified of the failure. The failure mileage was 112,000.

- Granite Bay, CA, USA

problem #3

Jan 202015

Sierra 2500

  • miles
The contact owns a 2004 GMC Sierra 2500. The contact stated that while driving at 70 mph, the vehicle failed to accelerate and the fuel restriction warning light illuminated. The failure occurred multiple times. The vehicle was towed to the contact's home. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The failure mileage was unknown.

- Burt, MI, USA

problem #2

Feb 192010

Sierra 2500 8-cyl

  • 132,000 miles
Vehicle has experienced multiple instances of exhaust manifold bolt failures at the cylinder head on both banks of the engine.

- Danielson, CT, USA

problem #1

Jul 222011

Sierra 2500

  • 46,500 miles
I bought this truck from dealer with 40151 miles. I have this truck from 2007 to present time with the mileage at 51,000 miles. The truck has been used for personal use only. I feel that there should be a investigation into this problem because this will effect millions of GM trucks. This problem will cost over $1000. To fix because of possible fire, engine failure, emissions problems, other very costly problems that will relate to the bolts breaking off from defect on the exhaust manifold. This can cause very serious problems. (this is as serious as the Toyota car problems or worse). I also think with the new air emissions standards these trucks will not pass the inspections. Because of the exhaust leaks on the motor. There is no doubt I feel this should & can be a class action suit. GM knows of this defect of the bolt but still no recall. Why must it take someone to get killed or hurt before they fix the problem. I don't have thousands to fix this problem & now when I drive I am worried about the truck going on fire. GM must do the right thing to correct the problem the caused. Please keep me informed. Thank [xxx] information redacted pursuant to the Freedom Of Information Act (FOIA), 5 U.S.C. 552(B)(6).

- Stroudsburg, PA, USA

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