'05 Crew Cab Power Locks
 

I've owned my truck going on 3 years now and recently I've had problems with the rear doors not locking with the key fob or with the switch on the driver and passenger doors. The front doors lock fine. I've not taken it to the local dealer because I believe that's where the problem originated. Long story, but over the past year everytime I would have it serviced something on the truck would "magically" stop working when I picked it up where as it was working before I dropped it off. The door locks is the most recent issue. Before that the AC wasn't working when I picked it up. It was 110 degrees when I dropped it off, trust me I know the AC was working.:lol: When I carried it back and complained they immediately jumped on it and fixed the "problem". The service guy wouldn't even tell me what was wrong with it. He just kept telling me they took care of me.

Anyway, I have since quit using that dealer because I don't trust them anymore.

Back to the original question, is there something I can check myself as to why the rear locks aren't working?

Thanks.

Re: '05 Crew Cab Power Locks
 

Shannon, pull the trim panel off and make sure the actuator is plugged in. The door lock actuator is part of the latch, so it made have "come" unplugged. They are going out left and right on the newer trucks (07-up), but I don't know if they were as problematic on the older ones.

Re: '05 Crew Cab Power Locks
 

Thanks for the reply JB.


I failed to mention in my opening post that if I lock the rear doors manually they'll unlock with the key fob and with the switch on the driver's door. Does this change anything as far as what to check?

Re: '05 Crew Cab Power Locks
 

My 03 Crew does the same thing . Its been over 2mos that it has happen.There were times i thought i had locked the doors only to find the rear doors were never locked????

Re: '05 Crew Cab Power Locks
 

GM has updated there relays for the power door locks. The are not expensive. The relays are located under the cover on the drivers side of the dash with the drivers door open. I had the same issue with mine, the contacts are worn out in the relays and need replaced.

Re: '05 Crew Cab Power Locks
 

Thanks do you have a part #?

Re: '05 Crew Cab Power Locks
 

Part numbers-

Numbers on the relays are as follows,
New 13502751 made by Denso in Japan
Old 15328867 made by Delphi in Korea

Numbers on the bag for the new relays are,
GM# 19116058
AC Delco #D1780C

Re: '05 Crew Cab Power Locks
 

Thank you Havent had the problem for some time yet

Re: '05 Crew Cab Power Locks
 

Just wanted to say thanks for passing along this information. I replaced the relays and it fixed my door lock issue.

Thanks again.:metal:

Re: '05 Crew Cab Power Locks
 

Glad to hear that fixed it. Another success story thanks to the wonderful members here!

Re: '05 Crew Cab Power Locks
 

No problem, glad I could help keep a vehicle or 2 out of the dealer.

Re: '05 Crew Cab Power Locks
 

woo hoo, it worked for mine also. Thank you very much!!!!!!!!
I need to add that my wife thanks you also, She only lets me drive it on Saturdays when it needs gas and washing!!!

Re: '05 Crew Cab Power Locks
 

This old thread fixed my rear door locking problem. They would unlock fine, but would not lock. I tested by swiching the two relays and the problem reversed itself. $12 at the parts store and my door locks were fixed. Thanks to all!
2003 GMC Sierra 1500HD SLT, gas, original owner, 80k miles

Re: '05 Crew Cab Power Locks
 

No problem. Glad I could help you fine folks.

Re: '05 Crew Cab Power Locks
 

I have a 2006 crewcab. My driver side rear door will not lock. I tried a relay it didn't fix it. Do I have to reset the battery or something to get the relay to work? Even when I manually lock the door , you can still open it. Anyone got any ideas?

Re: '05 Crew Cab Power Locks
 

In my case the bad relay affected both rear doors I did not have to do anything with the remote or the battery I also tested by switching the relays

Re: '05 Crew Cab Power Locks
 

Yeah, it's probably my door lock actuator.