hgoodwiniii

Ok, thanks. I will try to jump the starter over to see if the engine cranks today. Thanks.

Hi all, I am new to the forum and need some help. I am having trouble where my 2008 Silverado 1500 won't turnover with the key in the crank position. When I turn the key to the "on" position, all gauges/ gauge lights in the instrument cluster activate. When I turn the key all the way forward to the "start" position, all gauge/ gauge lights in the instrument cluster go blank. That includes the 'anti theft/security" light. I have had the battery, ECM and starter/solenoid tested. They came out fine. I have put a test light on the starter solenoid wire connector and there is no power there with key in the crank position. I did an OBD scan and I am getting code U0100 ( Lost Communication with ECM/PCM). Anyone have any thoughts what the problem may be and what I need to check next? Thanks.