1999 GMC Sierra Door Unlock Programming

1999 GMC SIERRA
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TTROAD
  • MEMBER
  • 1 POST
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 1:53 PM
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SQM
  • ✓Experienced Mechanic
  • 6,383 POSTS
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 5:56 AM
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Suggested Repair

On a 1999 GMC Sierra, the doors unlock only when the key is removed from the ignition and cannot be programmed to unlock when shifted into park. Automatic unlock in park and related programming are available on 2001 and newer models.

Conversation Summary

The owner of a 1999 GMC Sierra wants the doors to lock when the truck is put in gear and unlock when taken out of gear, instead of requiring the unlock button to exit. The expert explained that this year only unlocks the doors when the key is removed from the ignition and is not programmable for park unlock. That feature and programming are available on 2001 and newer vehicles.

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