Manifold/header/muffler/tail Pipe problems of the 2004 GMC Sierra 2500

Tl the contact owns a 2004 GMC Sierra 2500. While driving approximately 45 mph, the contact noticed a lot of white smoke emerging from the tail pipe. The vehicle was previously repaired under warranty by gwatney Buick GMC (5700 landers rd, north little rock, ar 72117) for the same failure as listed in an unknown technical service bulletin regarding the fuel injectors. The vehicle was not diagnosed or repaired for the recent failure. The manufacturer was notified of the failure. The approximate failure mileage was 90,000.

Exhaust manifold bolts broken.

The contact owns a 2004 GMC Sierra 2500 hd. The contact stated that while driving various speeds he would hear a loud noise coming from the engine. The vehicle was taken to an independent mechanic for diagnosis where the contact was advised that the manifold bolts were fractured and needed to be replaced. The vehicle was not repaired. In addition, the contact also noticed that the instrument cluster failed and he was unable to determine what speed he was traveling, how much fuel was in the vehicle, etc. The vehicle was taken for inspection where the contact was advised that the cluster wiring failed and needed to be replaced. The manufacturer was contacted however, they offered no assistance. The failure mileage was approximately 50,000. The current mileage was approximately 53,000.

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).

Vehicle has experienced multiple instances of exhaust manifold bolt failures at the cylinder head on both banks of the engine.

My vehicle had brake lines replace two times with less than 65,000 miles because breaks stop working. Fuel line replaced under 55,000 miles because it made check engine light come on speedometer erratic,oil pressure gauge high and low,fuel gauge erratic under 65,000 miles. Loud noise from engine service technician reported the exhaust manifold bolts has broken to call a white smoke from the motor. Everything happened with consider to be low mileage in talking to gm they don't care because enough report has not been made.