2003 GMC Sierra Fuel system Problems

“I wrote GM on october 26, 2013 about my 2003 Gmc Sierra duramax diesel 6.6l 6l that just recently started billowing bluish black smoke constantly from the exhaust and costing an exorbitant amount of money in gas. I took it to the dealer (quality by dilorenzo in albuquerque, new mexico) and they informed me that there was a bulletin issued in october 2006 for leaking fuel injectors. They diagnosed my truck with the exact fuel injector problem. …”

“I own a 2003 Gmc 3500 Sierra with a duramax diesel engine. It is used recreational, and has under 30k miles, but is now 36 months old. This summer 1/2 of my fuel injectors failed and were replaced under warranty. I'm concerned there the rest of the injectors will fail, as has been frequently reported by owners sharing concerns on various online forums. I am additionally concerned that this failure will occur after my warranty expires. …”

“Failed component 1: driving at slow speed, reduced power light energized and engines goes to idle speed with no fuel pedal response. Failed component #2: exhaust manifold bolts in cylinder heads broken on both sides of engine, passenger exhaust manifold cracked, exhaust is loud with exhaust fumes in cab. Depending on what is causing the fuel system failure and whether the cylinder heads have to be removed to remove the broken bolts, these repairs could cost thousands.”

“Vehicle goes into reduced engine power mode at interstate speeds without warning and increases risk of being rear ended, does not have enough power to safely get the vehicle off the road when in the left lane with other cars behind. More instances of this same scenario over the past few months than I can count. Throttle body has been cleaned. There are too many internet forum posts detailing many different parts having been replaced by dealerships and other mechanics and the problem still existing to just start replacing parts because the costs too quickly is unsustainable.”

“Dt: the consumer owns a 2003 Gmc Sierra. The consumer stated he has been having problems with the fuel gauge, fuel pump, and fuel filter. The fuel gauge does not work, he has to constantly fill up his truck to make sure he has enough gas. It started at 38000 miles just out of warranty when it stopped working. He had the part estimated by a mechanic and it is going to cost around 700 dollars just for the part. He does know of other people with the same truck and the same type of problem. The fuel gauge reads completely wrong when he is on 3 quarters of a tank it will be empty.”