Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
this is a 2004 Alalanche ?
when there will crank over and fire up then stall the issue is the theft lock system has been activated
as long as it will physically crank over then this should be a theft lock issue
since the light will also come on showing the lock this issue usually comes down to the ignition lock outer lock case that houses the passlock sensor not reading the key correctly
if this does this with another key then replacing the passlock sensor should correct this issue you are having
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