This is a very common problem on GM vehicles. The security system is known to fail. Basically when you insert your key, the system checks for certain OHMS resistance. If the system cannot get the correct signal from the key, it assumes the key is incorrect and goes into SECURITY lockout mode. (prevents hotwiring) This has been happening with GM;s for a very long time. If the light comes on, but you can still start it, thank the lord. Failure is coming soon. There are ways to bypass this now. Read through this page for info, solutions as well.
http://www.diy-gm-security.com/
SOURCE: bonneville wont start
Check your battery cables,, they are probably loose or corroded. Side mount batteries that hold multiple cables have this problem that occurs over an extended period of time. Cleaning the connections and retightening the hold down bolt may fix it. Sometimes a 3/8 bolt and a washer with a nut can be used to get
a more positive holding force to keep the cable tight.
SOURCE: 1993 pontiac bonneville se security light is
try turning the key on at leave it on till the security light goes off 10-15 minutes then turn the key off and back on and try starting it
SOURCE: 97 pontiac bonneville se airbag light stays on all
Here's a quick check list
for most common cost of SRS / Air bag problem.
Dirty contacts on driver
and passenger seat belt buckles
Dirty contacts on seat belt connectors
(under seats)
Dirty contacts on driver and passenger sides weight
sensors (under seat)
Seat covers
Weight on passenger seat
(Example:
grocery package trigger SRS / Air Bag light on the way home.)
I
recommend you to pass an vacuum over the contacts and use CRC
electronic parts cleaner to rule out connectivity problem.
I DO NOT
recommend disconnecting the negative battery connector to clean the code(s).
Without the code(s) the dealer will takes "BILLABLE" time to reproduce
the problem.
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Cheers,
Mustgo
SOURCE: 99 Bonneville wont start, Security light on
how to get the security light off and to get my car off security so it will stay running
SOURCE: 93 pontiac bonneville security light stays on and
You can easily bypass the entire VATS system. There is a clear write-up here on this website:http://newrockies.ca. This was the only thing that saved my 94 Park Avenue with the same security system.
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