GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi there, I am Cam. Can I get your name please? When you say you turn the key and get nothing, you mean no lights on the dash or anything?
Ok Lewis, specifically do you get the check engine light?
OK, Does it ever flash a security light or not show the gear position when this happens?
Were there any repairs prior to this issue? IT does sound strange, possibly a ground wire or even an Powertrain Control Module (PCM)
Ok, your a shop, So then you have a scan tool? I would like to know if the modes match when watching the mode master status in the Body Control Module (BCM).
OK, we need to see what codes and data are being sent. IF you had it never turning over then I would look to a starter, and that may be worth looking at without codes or data. Can you check power at the starter terminal in start?
Then we need data. I hate to default to that, but its an electronically controlled system.
Is there more I can get you at the moment?
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