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ironmike, ASE Master tech
Category: Chevy
Satisfied Customers: 3385
Experience:  30 years ASE Master L1 GM certified
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1999 chevy suburban: the security light is stuck on and it..try next

Resolved Question:

I have a 1999 chevy suburban that the security light is stuck on and it will start for a second and shut itself off. I tried turning on the ignition for a while and that didn't help what should iI try next?
Submitted: 7 years ago.
Category: Chevy
Expert:  ironmike replied 7 years ago.


did you try another ignition key? can you check for codes?

Customer: replied 7 years ago.
The ignition has been replaced about 2 years ago and I also tried a different key but no help there
Expert:  ironmike replied 7 years ago.


there is a fault with the passlock sensor/wire harness or the bcm. These are hard to diagnose and a scanner is needed. The dealer has the best diagnostic tools and if the bcm or passlock is replaced the vehicle would have to be reprogrammed.

good luck

Customer: replied 7 years ago.
It seems that the rainy humid weather effects this problem could this narrow down the problem, or can the security system be diabled
Expert:  ironmike replied 7 years ago.
still the same possible failures. This system cannot be bypassed.
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