GMC Troubleshooting Questions? Ask a Mechanic for Answers
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Try pouring a small amount of fuel down the throttle body, does it run for a bit?
Here is the location of the fuel shut off solenoid.
The pcm is the shut off on the gas engine.
Do you have spark?
You have voltage to the coil?
Is the distributor timed correctly?
IF you ground the coil, do you have spark?