Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Do you mean the Security warning is on? If so, do you have a spare transponder key?
I could guide you through a quick diagnostic test that will give us a better idea of where the issue lies. Do you have access and know how to use basic mechanic's tools including an automotive multimeter?
Good. With your voltmeter set for 20 volts DC, have a helper turn the ignition to START while you check for voltage at the Purple wire going to the starter solenoid. If more than 10.5 volts are getting there, the solenoid or starter is bad. However, if no voltage gets to that Purple wire, then go to the Park/neutral Position Switch on top of the transaxle and check for voltage coming in the Yellow wire and out the Purple wire. If no voltage on the Yellow wire, the most probable cause of the no-start is a bad ignition switch.
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