GMC Troubleshooting Questions? Ask a Mechanic for Answers
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What kind of trouble are you having?
My suspicion is that either your FICM module has failed or you have a shorted fuel injector causing trouble in the FICM. I would check the resistance of the injectors at the FICM using the schematic I have attached. If the injector resistance checks out I would replace the FICM and if it doesnt I would replace the injectors
Yes it will need to be programmed
You have to program the FICM. Some of the remans come programmed and for that the snap on reset is sufficient
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