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Security light

Tiny
REAMY
  • MEMBER
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 140,000 MILES
The security light on my van stays on. I was told it could be my key wasn't programmed, or I could spend 80.50 per hour for our local dealership to diagnose the problem. Can I bypass the security system?
Thursday, June 10th, 2010 AT 4:35 PM

9 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,133 POSTS
First try to relearn the key by following the instructions below

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

If that doesn't work it may be the small wires that go from the ignition tumbler to the security system., they tend to break causing the system to not be able to recognize the key chip
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Monday, July 19th, 2010 AT 11:29 PM
Tiny
MOE92136
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
The security light on my dash is on. The van has stopped running. We started having problems after we had a new key made at the dealer. What does that mean?
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Monday, November 5th, 2018 AT 6:37 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,133 POSTS
Hi:
The system is not recognizing the new key. Return it to the dealer.

Joe
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Monday, November 5th, 2018 AT 6:37 PM (Merged)
Tiny
QUETO71_YAHOO
  • MEMBER
  • 1 POST
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
What does SECURITY on the instrument light mean?
After about 30 minutes of driving and I want to start the van the light SECURITY flashes and the van will not start.
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Monday, November 5th, 2018 AT 6:37 PM (Merged)
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
You probably have a bad ignition cylinder and or ignition switch. Your antitheft system is not reading the correct info intermittently and thinks its being stolen, thus nat starting. Hope this helps
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Monday, November 5th, 2018 AT 6:37 PM (Merged)
Tiny
TEDDY55
  • MEMBER
  • 1 POST
  • 2002 CHEVROLET ASTRO
  • 167,000 MILES
I changed my ignition and security light is flashing it won't start it wants to but won't kick over I changed the cylinder with a new pair o keys as well as the harness the cylinder sits in Someone said to do a relearn process but I don't know what that is or how to go about that
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Monday, November 5th, 2018 AT 6:37 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Here's how to do it see pic
Image (Click to make bigger)
Thumb
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Monday, November 5th, 2018 AT 6:37 PM (Merged)
Tiny
FRNCESC2001
  • MEMBER
  • 2 POSTS
  • 2001 CHEVROLET ASTRO
  • 160,000 MILES
Your Question Edit Question
security light on 2001 chevy astro will not turn on. Van won't start. Had an o2 censor replaced a week before it died while I was driving. I refer to it dying as "ding ding dead" it powered off in a matter of seconds. And has not been revived since. Garage says there is spark, and fuel line is fine. Starter clicks repeatedly but no start. Not the rotor, not the distributor cap. They tried resetting passlock (they said)
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Monday, November 5th, 2018 AT 6:37 PM (Merged)
Tiny
FRNCESC2001
  • MEMBER
  • 2 POSTS
It cranks great, just doesn't start :( battery is good, garage didn't say connections were bad (they said they checked spark and that was good). What are these switches? If a clutch switch or neutral switch was bad. What would that entail?
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Monday, November 5th, 2018 AT 6:37 PM (Merged)

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