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Silverado - Starts, Runs 1 Seconds, Shuts Off...Repeats automatically

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Old 09-29-2014, 02:47 PM
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Default Silverado - Starts, Runs 1 Seconds, Shuts Off...Repeats automatically

Truck has been sitting for about 2 weeks. It's raining today if it matters.

Hopped in truck, drove to lunch. Started fine and ran as normal.

After lunch I put key in the ignition and turn it to the ON position (not Start) and the truck automatically starts, runs for about a second and turns itself off. It will continue to do this until I turn the key back off. The most I let it go was about 6 or 7 cycles. Didn't seem like it was going to stop.

I've never seen or read about this anywhere. Tried searching, if the answers out there I haven't hit the right combo of keywords yet.

No auto start, no aftermarket anything on the truck. Work truck package, doesn't even have power locks.

I won't have time to take my laptop over to scan it until tomorrow. Would like to not have to if there's a simple fix...
Old 10-02-2014, 02:09 PM
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No codes. I unhooked the battery. Let it sit for an hour. Now all is well.

Still pretty weird...
Old 10-07-2014, 03:52 PM
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What year truck?

I'm pretty sure 2003 plus the PCM cranks the starter, not you (even if you think you are)...so a flaky ground or ignition switch might be causing your problem.
Old 10-07-2014, 04:23 PM
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Sounds like a short of some kind.
Old 10-08-2014, 10:08 AM
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Did you check it for "B" codes?
Possible passlock fault



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