Driviing i couldnt get it started i had to wAIT UNTIL A FEW HOurs pass then the car would start. long enough for me to make it to my house. its done this twice. and i just got it back from the dealership they fixed the rack inpinon and both drive arms prior to this happening . I also the day before was in the grocery store parking lot and tried to shift my car into park but was unsuccessful it go stuck in reverse. the transmission cord broke and my step dad came and rigged it enough so i could drive my car home. thats when 2 days later while i was going 30 mph in the middle of traffic the check engine light came on and the car turned off what can i do i just replace all the fuses the battery the gas cap and the ingnition switch . and i still have this problem. it hasnt shut off it just dont start again after turning off
Check fuel filter
SOURCE: 2002 GMC 2500HD 8.1L
Sounds like the cam positioning sensor. I have a 2002 GMC 2500HD 8.1L and this happened to me. Hope this helps.
SOURCE: wont shift back from 4x4 low, to 2x2
I also have a 2002 Envoy. Shifting to and from 4wh and 4wa can be done on the fly but shifting to 4wL has to be done stoped and while in neutral. Try that. Otherwise I'm afraid its a new computer for you. Its located under the left rear seat and you need a loan for one.
SOURCE: 2007 GMC Envoy - Gas gauge showing empty and check engine light
This is a safety feature that the vehicle brings. You need to reset the E.C.U on dealership or it will keep doing it to you. It was probably caused by one single time that you did not closed the fuel cap correctly. Good luck
SOURCE: Tighten gas cap and then
Doesn't completely sound like a fuel pump problem...sounds like a vacuum line problem .... check your pcv ...and vacuum lines and when was your fuel filter last changed and how many miles are on the car...your fuel pressure regulator solenoid needs to be dry on the vacuum side too...diaphram could be leaking but if you can't find an obvious problem I would definiately find a qualified mechanic to dive into it...do you have access to a scan tool to read the trouble codes?
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