Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
how do you end up getting the truck running when its acting up ?
right now its hard to say why adding a jumper cable made it start up
can you see if it will start with jumper cables now ?
usually when the theft/security light is blinking when it will not start the issue is the key OR the passlock sensor that reads the key to a BCM or an ECM issue
usually if you have the BCM and or ECM codes read and there is a code set for the passlock system then replacing the passlock sensor should correct this issue
if no codes set in either module then usually the issue will come down to a weak battery or bad battery cables or the ECM or the BCM being bad
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