GMC Troubleshooting Questions? Ask a Mechanic for Answers
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I will do my best to assist you
this sounds as if you have a bad ignition module
what is going on is that the starter is pulling amps away from the bad ignition module
thus,killing the fuel injector pulse
it will still have a spark when they do this but the fuel injectors wont work while the starter is turning
this is why it will start with a prime
replace the ignition module
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