It started last week but now key will not turn on and will not start with electric start head lights come on when electric start is pushed but car will not turn over
Sounds like a flat battery. Just enough to power your lights but not enough to power the starter motor. Try recharging the battery.and check battery connections are good.
SOURCE: Liftgate hydraulics stopped working 2003 GMC Envoy SLT
Yes this is electrical. Start by checking the fuses.
SOURCE: 2002 GMC Envoy
If your 2002 gmc envoy or sierra will not even turn over with a kown good battery try starting it in nuetral then go back to park and try starting again. There is a park nuetral safety switch that can malfunction. Turn the key on then shift into nuetral, then turn fully to start.
SOURCE: Why does my heater keep running after I shut my Envoy off?
I have the same problem. I have also been searching the web for a solution. I came across someone saying that it was the heater module located behind the glove department. I can't find now where i read this but it said the part was approx. $150.00. He was having same problem as us, heater wouldn't obey touch commands to turn on/off or when heater did blow it would only blow real low or real high. Like you, after turning off engine blower motor was still running even though it wasn't blowing air out.
I'm tired of paying for things that are not due to normal "wear and tear" on my 2003 Envoy. Let me know if this helps you and how you repaired it. I'll probably have to take mine to the shop but because I'm a "girl" I swear they think I'm crazy with all my Envoy complaints.
SOURCE: 2004 GMC Envoy SLT possible electrical problems
it sounds like you need a regulator for your alternater it is reversing polarity there for draining your battery and reseting the clock. it is located on the back of your alternator.hope this could help.
SOURCE: I have a 2002 GMC Envoy and it turns off when I turn the AC on?
could be the a/c compressor ...
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