Vats

jbrew0126

Member
Joined
Jan 5, 2026
Posts
1
Location
Seymour
I tripped the VATS system now my truck k won't start cani just by pass the VATS by hooking a jumper wire to the fuel p ump relay and starter relay?
 
Welcome to the forum from Oregon.

Sure would be nice to know what the vehicle/truck info is. Is it a secret?

How did you "trip" the VATS system?
 
This is on your 2003 Silvy? Maybe. Try starting it with starting fluid and jumping the starter relay. If it starts, then jumping the pump relay should work. If not, then the PCM is also killing the ignition. Just jumping them straight away should tell you if this works or not.

It may just need a relearn.
1. Turn ignition on.
2. Attempt to start the engine, and then release the key to the “ON” position.
3. Observe the “SECURITY” indicator light. After 10 minutes the “SECURITY” indicator light will turn off.
4. Turn ignition to the “OFF” position, and wait 10 seconds.
5. Attempt to start the engine, and then release the key to the “ON” position.
6. Observe the “SECURITY” indicator light. After 10 minutes the “SECURITY” indicator light will turn off.
7. Turn ignition to the “OFF” position, and wait 10 seconds.
8. Attempt to start the engine, and then release the key to the “ON” position.
9. Observe the “SECURITY” indicator light. After 10 minutes the “SECURITY” indicator light will turn off.
10. Turn ignition to the “OFF” position, and wait 10 seconds.
11. Vehicle has now learned the new password. Start the engine.

Best thing to fix this is to have the PCM programmed to ignore VATS and start regardless. There may be other ways to bypass VATS using resistors on the key sensor. Here is a thread that talks a lot about it, different truck but same system:

 
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This is on your 2003 Silvy? Maybe. Try starting it with starting fluid and jumping the starter relay. If it starts, then jumping the pump relay should work. If not, then the PCM is also killing the ignition. Just jumping them straight away should tell you if this works or not.

It may just need a relearn.
1. Turn ignition on.
2. Attempt to start the engine, and then release the key to the “ON” position.
3. Observe the “SECURITY” indicator light. After 10 minutes the “SECURITY” indicator light will turn off.
4. Turn ignition to the “OFF” position, and wait 10 seconds.
5. Attempt to start the engine, and then release the key to the “ON” position.
6. Observe the “SECURITY” indicator light. After 10 minutes the “SECURITY” indicator light will turn off.
7. Turn ignition to the “OFF” position, and wait 10 seconds.
8. Attempt to start the engine, and then release the key to the “ON” position.
9. Observe the “SECURITY” indicator light. After 10 minutes the “SECURITY” indicator light will turn off.
10. Turn ignition to the “OFF” position, and wait 10 seconds.
11. Vehicle has now learned the new password. Start the engine.

Best thing to fix this is to have the PCM programmed to ignore VATS and start regardless. There may be other ways to bypass VATS using resistors on the key sensor. Here is a thread that talks a lot about it, different truck but same system:

What did I miss on a 1st post of a new member? There is no vehicle info and you asked if problem is on a 2003 Silverado. I am assuming, as a moderator, you have the vehicle info access that was likely shared when members sign up, correct?
 
What did I miss on a 1st post of a new member? There is no vehicle info and you asked if problem is on a 2003 Silverado. I am assuming, as a moderator, you have the vehicle info access that was likely shared when members sign up, correct?
It's in his user profile under "About", available to everyone.
 
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Reactions: movietvet
It's in his user profile under "About", available to everyone.
I did look and find that info. It would be way easier for a new member, especially if they are asking for help, to provide vehicle info when doing so. I am 73 and lazy. C'mon man!
 

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