Question about 2004 GMC Envoy
My 04 Envoy has some issues. The 1st one is that the Service Engine Soon light comes on intemittently, and I don't know what it could be. The 2nd issue is that my truck seems to loose power when driving up hill with my AC turned on, any ideas what can cause this? An the last issues is that it sometimes overheat when driving for around 30 min plus, with the AC turned on all the fluid levels are fine but I cannot figure out what could be causing this. Can you give me any solutions for any of these problem?
I also have an '04 Envoy XL. The problem we had was very similar. The truck lost power and the wife and kids were stuck on the interstate. It was the catalytic converter totally clogged. We were told by our trusted mechanic that we were lucky not to have blown a head gasket from the back pressure. Two days after having the converter replaced the check engine light came on. I went to Autozone to have the codes read. I don't remember the code number but it was basically that the thermostat was stuck open and the engine was running too cool causing it to run rich and clog the converter. I did not get a light until after and the light went out on it's own. I hope this helps you. GOOD LUCK!
Posted on Jul 07, 2008
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Posted on Jan 02, 2017
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