2004 GMC Sierra Engine starts and runs for about 15sec/dies

Tiny
TOMMYHONEY
  • MEMBER
  • 2004 GMC SIERRA
  • V8
  • 2WD
  • AUTOMATIC
  • 50,000 MILES
Engine starts and runs approx 10/15 seconds and dies. It's just like you turned key off. Turn key off and wait a second and truck will fire right back up and do same thing. Engine runs great and all lights and accessories are fine. The only thing added to electrical has been a Kenwood stereo. ( 4 months ago) Wondering if it has anything to do with alarm system?
Sunday, January 10th, 2010 AT 10:42 PM

3 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Have you done a relearn on the pass-key?
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
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Monday, January 11th, 2010 AT 2:59 PM
Tiny
TOMMYHONEY
  • MEMBER
  • 2 POSTS
Truck still does same thing after GM Pass Lock Relearn.
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Monday, January 11th, 2010 AT 6:14 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Truck will need to be scanned with GM Tech II tool or equivalent to find out if anything is wrong with security system, generic tools dont read these codes.
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Tuesday, January 12th, 2010 AT 2:27 AM

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