Security light randomly turns on while driving

2002 CHEVROLET 1500
175,000 MILES • 4.8L • V8 • 2WD • AUTOMATIC
Avatar
TXFISHMAN
  • MEMBER
  • 3 POSTS
Recently has been doing it more often and staying on longer. This is a work truck,no electric locks,windows,seats or anything like that. I do not believe the truck has a security system. About 5-6 times over the last 6-8 months it wont run. It starts for a second and shuts off like it's not getting enough fuel. Researching this it sounds like a pass-lock or vats problem. I can sit there trying to start it off and on and finally after about 10-15 minutes it will start. What could it be and if it is a security issue how can i eliminate that system all together? Thanks
Apr 18, 2020 at 9:31 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,193 POSTS
  • ASE Certified Mechanic
Hi,

I do believe it is related to the security system. It isn't something that can be eliminated. When the engine will not start, does the security light stay on? If it does, try this. Turn the key to the run position and allow it stay there for approximately 10 minutes without trying to start it. If the light goes out, see if it starts. If it does, then we have an issue with the security system. Also, if you have a spare key, try it. An older key may not be getting recognized as easily.

Let me know what you find.

Joe
Apr 18, 2020 at 10:08 PM
Avatar
TXFISHMAN
  • MEMBER
  • 3 POSTS
When I start it the security light does not come on. It will just randomly come on while i am driving. I had a plain key made that I know does not have a chip and it starts the truck no problem.it's a work truck that belonged to the city so it's a no frills package.
Apr 20, 2020 at 11:30 AM
Avatar
DANNY L
  • ✓ASE Certified Mechanic
  • 5,648 POSTS
  • ASE Certified Mechanic
Hello, I'm Danny.

Here's something quick you can try. Here is a tutorial for resetting an anti-theft/security system:

https://www.2carpros.com/articles/how-to-reset-a-security-system

After reading, scroll the page to find Chevrolet.Hope this helps and thanks again for using 2CarPros.
Apr 20, 2020 at 4:43 PM
Avatar
TXFISHMAN
  • MEMBER
  • 3 POSTS
Like i said its a no frills work truck so there is no remote or electric locks or electric windows. I guess I’ll check the ignition tumbler for those wires you said break. It's a 2002 so i guess that could be it. Thanks and I will let you know what happens.
Apr 20, 2020 at 9:50 PM
Avatar
DANNY L
  • ✓ASE Certified Mechanic
  • 5,648 POSTS
  • ASE Certified Mechanic
Hello again.

Okay, Let us know what you find when you look into the tumbler for anything broken. Thanks again for using 2CarPros.

Danny
Apr 21, 2020 at 5:14 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.