Own a 2002 GMC Envoy with 159K on it; regular maintenance, runs great. Problem with Service Engine light--first time, dealer diagnosed camshaft sensor ($300 replacement); after only a few days, light comes on again; Dealer now diagnosing a timing chain issue--either with the tensioner or the chain itself--they want $500 just to disassemble and diagnose---does this sound right?

Own a 2002 GMC Envoy with 159K on it; regular maintenance, runs great. Problem with Service Engine light--first time, dealer diagnosed camshaft sensor ($300 replacement); after only a few days, light comes on again; Dealer now diagnosing a timing chain issue--either with the tensioner or the chain itself--they want $500 just to disassemble and diagnose---does this sound right? 1 Answer

I have a 2005 GMC Envoy with the Denali package and the 5.3 liter V8, the engine sometimes makes an occasional clunk sound during idle. The RPM's don't move and no other side effects, any idea or history of he 5.3 V8 making this noise and does it mean anything? 2 Answers

This usually occurs when its idling in park, once in a while you hear it a low speeds but again doesn't affect performance or anything else. I know its a 9 year old engine and has 84K on it, otherwise...

Why is the engine light on and why do I have a slow start with low RPM. 3 Answers

I got it out of the shop today. The shop changed fuel pump/module and ignition switch. Engine light on. Took it back. They put the ode reader on it and got a code 0147 but was scrambled. They got ...

My GMC Envoy has a new battery and ran fine for about a month, but now it will do nothing. Even with a charger or jumpers connected. No lights, No signals nothing .. It doesn't turn over or even click 2 Answers

I bought a new battery and had it installed. A month later the POS stopped running all together. I had jumpers hooked to it and it won't even collect a charge. The ports are all clean as well. It wi...

Why does my 2003 Envoy sometimes sound like a diesel and lose power on acceleration? The problem is intermittent. 1 Answer

There are times when the engine of my 2003 Envoy suddenly changes pitch and sounds like a diesel engine when I push the throttle down. The RPMs seem high while in this mode as I am gathering speed. ...