how to defeat chevy anti-theft feature

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nospam.don@gmail.com - 30 Apr 2006 18:14 GMT

My 99 suburban has an anti-theft feature that is somehow related to
battery removal. It seems that if you remove or replace the battery it
goes into a mode where it will start but will not run. After scouring
the service manual for an hour I found a way to reset it. It involves
cycling from off to run over the course of 30 minutes.

For some reason now when I go down to the gulf coast the salt air or
something down there causes this lockout feature to happen fairly
often.

Is there a way to defeat this feature altogether? I do have an OBDII
scanner but it shows nothing related to this.

Obviously, when I'm launching the boat down there I NEVER turn the
engine off if I'm anywhere close to the boat ramp. :-(

Don

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Shep - 30 Apr 2006 21:28 GMT

Vats chip in key system?

> My 99 suburban has an anti-theft feature that is somehow related to
> battery removal. It seems that if you remove or replace the battery it
[quoted text clipped - 13 lines]
>
> Don

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nospam.don@gmail.com - 06 May 2006 18:50 GMT

VAT must mean the original chevy oem key that has some kind of encoding
in it. I can only say I think so. I bought this truck used. I
think this key is pre-expensive keys. I have tried other keys with no
change. Besides that why would it only fail down at the coast?

It has failed this way not at the coast but only if I somehow run the
battery down. but...that is not consistent. Its run down before and
the anti-theft key reset did not kick in.

nospam.don@gmail.com really is my id so can reply directly if
interested.

tks
Don

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