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1999 Chevy Silverado SECURITY light on TRUCK WILL NOT START....

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Oct 13, 2011, 11:28 AM

Post #1 of 5 (17225 views)
1999 Chevy Silverado SECURITY light on TRUCK WILL NOT START.... Sign In

I should be a little more clear when I write this... I recently changed the oil in my truck. The battery was a little loose so I made sure to clean her up and hook everything back up. When I did it triggered my security feature on my truck. Before when I entered the truck the security would blink but when I unlocked from the inside the truck would start. Since I disconnected the battery the door lock button will only lock and will not unlock. You can here the passenger side try to unlock but not the drivers. Looking at the message dial in the dash it shows the security button SOLID not flashing anymore and then switches to the battery picture. It always shows this battery picture though in any car before starting. Take it in mind that the security light is SOLID and not flashing. As I try and start my truck the truck turns over but immediately dies a second after. After reading every where online this is due to the security feature not sending a message to my fuel injectors. Only thing I cannot grasp is that the door locks would not lock from inside. Sounds like the relays may have gotten damaged while reconnecting the batter or something. And also this may not mean anything but when I unlugged the battery the driver side door was ajar and the door (bing bing bing) was playing. After I replugged the door the noise (bing bing bing) did not return. I've read so many different post on this problem and with my finances need to take the cheapest ones first before I take it to a dealer to get it "flashed" again. Even with a flash to the computer people have said it has come back.. After the I left truck on and am going to hook a battery charger up to my battery because I left the key on all night by mistake. The truck is still in the same security mode and I have no idea how to fix it. She wants to run and I know its now the fuel pump or anything mechanical its just that damn secuirty feature. Also does anyone think if I took it to some alarm shop for an after market alarm that it could be bypassed by another system???? Someone please help

Old 396

Oct 13, 2011, 1:30 PM

Post #2 of 5 (17177 views)
Re: 1999 Chevy Silverado SECURITY light on TRUCK WILL NOT START.... [In reply to] Sign In

Could be a few different things going on here. First and most critical is the security system "OE" or aftermarket? If aftermarket are you able to post a model number and the makers name?

Veteran / Moderator

Oct 13, 2011, 4:16 PM

Post #3 of 5 (17170 views)
Re: 1999 Chevy Silverado SECURITY light on TRUCK WILL NOT START.... [In reply to] Sign In

Turn the key to the "On" position in the Silverado without turning over. Let the vehicle sit for 10 minutes, leaving the key in the "On" position. Some Passlock systems will relearn the codes after this amount of time.


Old 396

Oct 13, 2011, 4:38 PM

Post #4 of 5 (17161 views)
Re: 1999 Chevy Silverado SECURITY light on TRUCK WILL NOT START.... [In reply to] Sign In


You've yet to respond, so at this point it’s not clear if you have a Passlock system or not? If you do (and in addition to what’s already) been posted try the relearn procedure below

Turn the ignition to the on position. This is the position where all the lights and icons are on in the dashboard but don’t start the car.
Attempt to start the engine. If it doesn't start then release the key back to the on position.
Watch the security light. After 10 to 15 minutes the security light should turn off.
Turn the ignition off and wait 5 seconds.
Repeat steps 1 through 4 two more times for a total of 3 cycles (30 minutes). The car is now ready to relearn the Passlock sensor data code (or password) the next time the ignition key is turned from off to crank.
The vehicle will learn the Passlock sensor code (or password) on the next turn of the ignition key from off to crank. You must turn the ignition OFF before attempting to start the vehicle. Start the engine. The car has now learned the Passlock sensor data code or (password). Using a scan tool clear any error codes. The history of error codes will clear itself after about 100 cycles of the ignition key.

Removed links from site info was taken from (10W40)

(This post was edited by Hammer Time on Oct 13, 2011, 6:03 PM)

Veteran / Moderator

Oct 13, 2011, 4:52 PM

Post #5 of 5 (17161 views)
Re: 1999 Chevy Silverado SECURITY light on TRUCK WILL NOT START.... [In reply to] Sign In

The system discribed is a typical oem passlock system . After a power interrupt the reset procedure should work . IF by chance it does not then i would confuse him with more info.(in addition to what's all ready) been posted.


1999 Chevy Silverado SECURITY light on TRUCK WILL NOT START....

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