Pass-lock system will not turn off

JEREMIAHN

MEMBER
2003 CHEVROLET SUBURBAN
5.3L
V8
2WD
AUTOMATIC
230,000 MILES

Hi, I am having this common issue of being unable to reset the pass-lock system. I've tried keeping the key in accessory mode for ten-minute intervals as is commonly recommended, but it has not worked. The lock light on the dash still lights up and it starts for about 2 seconds and shuts off. Any ideas?

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

Sounds like you tried the processes in this guide but take a look at it and just make sure:

https://www.2carpros.com/articles/how-to-reset-a-security-system

If you did, then we need to start with checking for codes.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Depending on what codes are there, we will have a better idea as to what the issue is.

If we have no codes, then the most common cause of this is a key so we may need to just replace the keys and retest this unless you have multiple keys doing the same thing.

Let's start with this info and go from there.

Thanks

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