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I have a 2007 envoy denali that stalls after driving for at least an hour.
2007 GMC Envoy

I have a 2007 Envoy Denali that stalls after driving for at least an hour.

(2007 GMC Envoy)
The process seemingly speeds up if I run the A/C and it will die after 30mins. When i attempt to restart the automobile the ignition will keep turning itself even after letting go of the key. If i allow the vehicle to sit for 30 mins to an hour then it will restart. I've had it to the repair shop 4 times in the past 2 months, they replaced the ignition switch to no avail. What could be the issue here? Also the check engine light comes on after it stalls out I had it analyzed with a code reader and I don't have the specific codes but i remember it said Bad ignition switch(which they replaced) and ECM & PCM low voltage . Any information/help would be greatly appreciated. Thanks in advance.

What seems to make the problem better or worse? Running the air causes the issue to happen faster.
How long have you had this problem? 3-4 weeks
Tags: gmc, envoy
1 answer & 2 comments
Popular Answer
on August 04, 2019

Surely you can find a competent ‘mechanic’ that can actually do the required *hands-on* testing to find what is failing and causing this concern..

Furthermore - the starter will keep cranking for a predetermined amount of time - until
the engine starts or time has elapsed.. That is perfectly normal !

Good luck!
Sign in to reply
on August 05, 2019
Yeah well you would think that but I was taking it back to the dealer and they were using their "mechanics". Apparently they didn't even run diagnostics but it turned out to be a bad PCM.
on August 05, 2019

Actually powertrain control module failures are pretty rare - hopefully this will take care of the problem - long term..
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on August 04, 2019

Surely you can find a competent ‘mechanic’ that can actually do the required *hands-on* testing to find what is failing and causing this concern..

Furthermore - the starter will keep cranking for a predetermined amount of time - until
the engine starts or time has elapsed.. That is perfectly normal !

Good luck!
Sign in to reply
on August 05, 2019
Yeah well you would think that but I was taking it back to the dealer and they were using their "mechanics". Apparently they didn't even run diagnostics but it turned out to be a bad PCM.
on August 05, 2019

Actually powertrain control module failures are pretty rare - hopefully this will take care of the problem - long term..

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