what would be the most likely cause there no trouble codes if it sits for 30 minutes it will start
Mar 28, 2010 at 1:32 PM
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MMPRINCE4000
✓Experienced Mechanic
8,548 POSTS
Try resetting the security system:
GM PASS LOCK RELEARN- Ignition to "run" position, try to start and let key return to "run" position.
Approx ten minutes security light will go off
Turn key "off" and wait 5 seconds
Repeat 2 more times for a total of 3 relearns.
Turn key off, then start it.