How do you change the way the doors unlock on the driver and passenger doors?

1999 GMC SIERRA
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TTROAD
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How do you change the way the doors unlock on the driver and passenger doors? Right now I have to press the unlock button to get out of the truck. It is almost like the doors are child locked, but if I press the unlock button I can then get out. I would like it to lock when I put in gear and unlock when I take it out of gear. I was wondering if I needed to take it to the dealer ship or if I could do it myself.
Apr 30, 2006 at 8:53 PM
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SQM
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Hello,

On this year vehicle the doors will only unlock when you take the key out of the ignition.
They are not programable to unlock when put in park.
I know the 2001 and newer will unlock when put in park and are programmable.

Please let me know of any questions.
Thank you.
Jan 14, 2022 at 1:56 PM