Chevy Silverado Anti-theft System: How To Reset it

Gilbert Smith
Feb 9, 2021

It’s great having all these safety and security features in new vehicles. But every new gadget you add to a car or truck is one more thing that can go wrong. The Chevy Silverado’s anti-theft system is no exception, but, good news, you can usually fix it with a reset.

2007 Chevrolet Silverado 1500 - Photo by Chevrolet

How do you reset the Chevy Silverado’s anti-theft system?

Insert the ignition key, put it in the on position, attempt to start the engine. With the key in that position, wait ten minutes. The security light will blink and go out. Turn the key off, and wait five seconds. 

If that sounds complicated, don’t worry, we’ve got a YouTube video linked below to show you exactly what we’re talking about, and we’ll go over the process step by step. We’ll also cover other ways to address the problem if this fix doesn’t work.

2019 Chevrolet Silverado – Photo by Chevrolet

A Look at The Anti-theft System

An alarm is great if you’re standing within earshot of your vehicle, and if the guys stealing it don’t outnumber you. An anti-theft system goes a step further by immobilizing the vehicle when it detects that someone’s trying to steal it.

These systems have probably saved millions of cars and trucks from being stolen. But the chips in these systems will deteriorate over time.

That, plus the software can be interrupted by dead batteries and power surges, so in older vehicles, these systems are just as likely to make you late for work as they are to prevent your truck from being stolen. Good thing it’s an easy fix.

2019 Chevrolet Silverado – Photo by Chevrolet

How Do I Reset Anti-theft System: Chevy Silverado?

The problem: Your anti-theft system seems to think you’re a car thief, and it’s locking you out of your own vehicle. You try to turn the engine on, but it won’t startup. This is a simple computer issue, and can usually be solved with a system reset.

This fix has been tested on a number of 1999-2005 GM vehicles, the ones with the most anti-theft system problems, and it almost always does the trick;

  • Insert ignition key.
  • Turn it to the on position.
  • Attempt to start the engine. If you’re having a problem with the anti-theft system, the engine won’t start, and the security light will start flashing.
  • Leave the key in that position until the security light stops flashing. This should take about ten minutes.
  • Once the light goes off, switch the ignition key to off.
  • Wait about five seconds.
  • Try to start the engine again. It should turn over with no problems now.

If you’re still not sure what we’re talking about, here’s that video we promised.

Photos: Chevrolet

Owner Reviews

accountCircle Lisa Reynolds on November 29, 2022
2005 Chevy Silverado 1500 Anti-theft issue
My truck spontaneously decided that I was trying to steal it and refused to crank. I've tried every trick out there to attempt to reset without success. Checked fuses, unplugged computer, 10'/5" multiple times, key fob lock/unlock, etc... Finally had it towed to a CHEVROLET DEALERSHIP, where it's been for 5 WEEKS! Now they can't fix it because the part has been discontinued!!! 152 42 754... Wth?!! Trying to find one online, but still not sure whether this will fix the problem or not. How can Chevy discontinued a part that is NECESSARY to fix a known problem without having a replacement part?!!
accountCircle Doug on April 1, 2023
Theft notification coming on when starting/trying to start truck
What I found was the easiest way to reset anything to that extent was to remove my positive battery cable for atleast 30 seconds and then tighten the cable back up and the issue was resolved. A lot of mechanics don’t think of the simple things before they start getting to deep into other areas of the truck. It’s worked for me personally and many trucks I’ve worked on it’s worth a try before having it hauled to a dealership.
accountCircle Carol Angel on August 1, 2023
2004 no crank no start HELPplease
I have a 2004Silveradoand afterIattempt to start it, the light just stays on, it never starts flashing like you say it will? I jus replaced transmission and put a new starter on the truc. No crank no start.
accountCircle John moore on May 31, 2022
Chevy 2006 king cab truck with 4.3 v6
I've tried reseting the theft system wondering work won't crank the only way it will crank it turn headlightswitch on to back off then it cranks
accountCircle Shii on July 25, 2023
Lisa renoylds
Try replacing the box underside of the steering wheel. It connects to steering column and ignition switch it's got a gear on it.
accountCircle John H on July 13, 2022
My truck will start
The truck is starting. Poorly. But the truck is running the light is solid.
avatar Gilbert Smith
Gilbert Smith is a New Mexico-based automotive journalist who enjoys writing about cars, trucks, and SUVs. He is a longtime contributor to Vehicle History and a member of the site's original content team when it launched.
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