# GMC power locks **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** gmc, 1500\ **Created:** [December 11, 2009, 7:59pm UTC](https://community.cartalk.com/t/gmc-power-locks/40630 "2009-12-11T19:59:36Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Bob454](https://avatars.discourse-cdn.com/v4/letter/b/74df32/32.png) [@Bob454](https://community.cartalk.com/u/Bob454)\ **Post date:** [December 11, 2009, 7:59pm UTC](https://community.cartalk.com/t/gmc-power-locks/40630/1 "2009-12-11T19:59:36Z")
The power locks completely stopped working, what is the probable cause? ---
**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\ **Post date:** [December 11, 2009, 9:05pm UTC](https://community.cartalk.com/t/gmc-power-locks/40630/2 "2009-12-11T21:05:58Z")
Blown fuse? If so, why? When you say completely, you mean they don’t work with the remote OR individually from inside? CEL? Dash warning indicator light? ---
**Author:** ![Bob454](https://avatars.discourse-cdn.com/v4/letter/b/74df32/32.png) [@Bob454](https://community.cartalk.com/u/Bob454)\ **Post date:** [December 11, 2009, 10:59pm UTC](https://community.cartalk.com/t/gmc-power-locks/40630/3 "2009-12-11T22:59:53Z")
When I push the button on either door I can hear the relay click for both lock and unlock. With the fob I can also hear the relays click, it will also set the alarm flash the headlights, and honk the horn as it should. I changed the fuses and still no locks. I bought the truck new and it has never been messed with. ---
**Author:** ![Bob454](https://avatars.discourse-cdn.com/v4/letter/b/74df32/32.png) [@Bob454](https://community.cartalk.com/u/Bob454)\ **Post date:** [December 11, 2009, 11:00pm UTC](https://community.cartalk.com/t/gmc-power-locks/40630/4 "2009-12-11T23:00:53Z")
Also, there are no warning lights. ---
**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\ **Post date:** [December 12, 2009, 12:01am UTC](https://community.cartalk.com/t/gmc-power-locks/40630/5 "2009-12-12T00:01:29Z")
What year is it, Bob? Out of warranty, I guess. If you can hear the relays activating perhaps try to reprogram the lock/unlock mode. There should be instructions in your owners manual. ---
**Author:** ![Bob454](https://avatars.discourse-cdn.com/v4/letter/b/74df32/32.png) [@Bob454](https://community.cartalk.com/u/Bob454)\ **Post date:** [December 12, 2009, 12:07am UTC](https://community.cartalk.com/t/gmc-power-locks/40630/6 "2009-12-12T00:07:35Z")
It’s a 2001. I will try reprogramming the locks. ---
**Author:** ![Bob454](https://avatars.discourse-cdn.com/v4/letter/b/74df32/32.png) [@Bob454](https://community.cartalk.com/u/Bob454)\ **Post date:** [December 12, 2009, 12:45am UTC](https://community.cartalk.com/t/gmc-power-locks/40630/7 "2009-12-12T00:45:00Z")
Reprogramming the locks did not work. I either need to get a wiring diagram or take it in to a shop. ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [December 12, 2009, 7:06am UTC](https://community.cartalk.com/t/gmc-power-locks/40630/8 "2009-12-12T07:06:30Z")
I don’t think you are hearing relays click most likely actuators trying to work ---
**Author:** ![kmccune](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/kmccune/32/1237_2.png) [@kmccune](https://community.cartalk.com/u/kmccune)\ **Post date:** [December 12, 2009, 1:51pm UTC](https://community.cartalk.com/t/gmc-power-locks/40630/9 "2009-12-12T13:51:51Z")
It took over a 100K for the PDLs to stop working on my 2000 Focus,never could find out how to disable them with the computer(the manual windows still worked fine) have you tried squirting a bit of penetraing lube in the actuators if you can get to them?-Kevin ---
**Author:** ![Bob454](https://avatars.discourse-cdn.com/v4/letter/b/74df32/32.png) [@Bob454](https://community.cartalk.com/u/Bob454)\ **Post date:** [December 12, 2009, 2:00pm UTC](https://community.cartalk.com/t/gmc-power-locks/40630/10 "2009-12-12T14:00:27Z")
The sound that I hear is from the fuse/relay panel in the dash. There is no sound in the doors. ---
**Author:** ![Bob454](https://avatars.discourse-cdn.com/v4/letter/b/74df32/32.png) [@Bob454](https://community.cartalk.com/u/Bob454)\ **Post date:** [December 12, 2009, 7:22pm UTC](https://community.cartalk.com/t/gmc-power-locks/40630/11 "2009-12-12T19:22:09Z")
Problem solved! A bad wire in passenger door blew a 20A fuse (not clearly labeled as a lock fuse), but it’s all good now. Thanks for the help, Bob ---
**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\ **Post date:** [December 12, 2009, 8:45pm UTC](https://community.cartalk.com/t/gmc-power-locks/40630/12 "2009-12-12T20:45:12Z")
As mechanics we are trained to check all fuses whether they are labled to indicate they apply to the system you are troublshooting or not. If a pro made such a mistake it could cost him his job. The owner would figure if such if such a sympton so easily stumped you that you are likely to have further problems,roll out your iron buddy. ---
**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\ **Post date:** [December 13, 2009, 5:29am UTC](https://community.cartalk.com/t/gmc-power-locks/40630/13 "2009-12-13T05:29:31Z")
Thanks for posting the results.