Security system problem

1999 GMC SUBURBAN
250,000 MILES
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JAEGER57
  • MEMBER
  • 2 POSTS
I drive this truck everyday to and from work. Today I went out to crank it and it started then stopped immediately.

Told that's a security system problem.

However, my truck uses a regular key, not a VATS key.

How can I 'fix' this?
Jan 18, 2019 at 2:49 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,214 POSTS
Hello,

Can you tell me if the security light is flashing when you try to crank the engine over?

Please let me know.
Jan 19, 2019 at 3:41 AM
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JAEGER57
  • MEMBER
  • 2 POSTS
Stays on; doesn't flash.
Jan 19, 2019 at 3:52 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,214 POSTS
Hmm, not flashing doesn't sounds like the serytuit is enabled to tell us for sure lets run the codes. here is a guide to help us get started:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please run down this guide and report back.
Jan 21, 2019 at 1:51 AM
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