Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
This sounds like the PassLock System & could be a bad Ignition Cylinder or wires at the Cylinder
Be sure the battery is fully charged. Turn the ignition switch from the OFF position to the CRANK position allowing the vehicle to try and start. The vehicle will start and then stall. Leave the ignition switch in the ON position while observing the security indicator. When the security indicator turns off, which can take up to 10 minutes, turn the ignition switch off. Wait 10 seconds . Repeat above Steps two more times (3 times total). The BCM and the PCM/VCM will learn the new code on the next start attempt.
ok it this fails what is the next step
replace lock cylinder, ignition switch , module are there any tests?
Use of Dealer Scan Tool is needed to verify PassLock issue & component failureTYpically it is the Ignition Switch, as the Hall Effect Resistor is internal, but wires from Switch to BCM & BCM need to be tested also, via Dealer Scan Tool
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We have replaced the Ignition lock cylinder, ignition switch, and the passlock module. We have done the manual relearn process a dozen times. The security light is always on when the ignition is on. The vehicle still starts then shuts right down.
Use of Dealer Scan Tool is needed to verify PassLock issue & component failure
There are a number of components associated with the PassLock System"IF" you believe it is the PassLock System & have verified Fuel Pressure & Spark, then you need to have the PassLock System tested via Scan Tool, as it will be more expensive to keep replacing Parts
You jsut asked:
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Thanks...........I thought that was what you meant
Sorry for the misunderstanding