GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi, I'm Ron and I will be helping you today.Stand by for a moment while I prepare your answer.
The problem can be a loss of spark or fuel. You can check forspark at the plugs with a spark tester.You can check fuel pressure with a gauge and both of these toolsshould be available to you at yourlocal parts store for rent or purchase.You need to check for any stored codes in the computer with acode reader or a scan tool.The code reader only gives the codes and definitions, where thescan tool gives you allthe needed data to diagnose the codes.
It's not a cam sensor issue. What is the pressure reading you got on your gauge?
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If you are satisfied with my answer, I would greatly appreciate a 5star rating now and I will still assist you after you have rated metoo if another question pops up. I don’t get credit for helping youuntil you rate me.Thanks again, Ron
Not good, it needs to be consistent. Pump is bad.
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