Last post on May 09, 2013 at 1:10 PM
You are in the Chevrolet Colorado and GMC Canyon
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Chevrolet Colorado, GMC Canyon, Electrical, Truck
#154 of 671 Drivers power window, door locks stopped working
Feb 04, 2009 (12:34 pm)
I have a 2004 GMC Canyon 4 dr and I have experenced this problem. I am in Minnesota so its cold here 5 months out of the year. I did some trouble shooting and this is what I found on my vehicle. My problem was in the drivers door control assembly. I have a schematic of this assembly. I took it apart and checked for water damage and it looked good. If you take the switch apart (seperate the two halfs) there is a small black sealed relay labeled RLY3. This is a relay that runs the auto down feature for the drivers window. It also contols the door locks. I did a GMC repair and tapped it with my finger and it started working!!! I am going to keep an eye on this and will keep you posted. I checked with the dealer and its about $200. (not in stock) I did check my BCM for water damage and mine was ok. I checked GM's TSB's and that was a problem with the 2005 models leaking water from the cowling area. I could not find any TSB's on the fuse box issue.
Thanks SNAPROLL1 for all your comments. By the way, I already hand my cylinder head replaced!!! If anyone needs the information on the notice from GM, let me know and I will get you a copy.
Happy GMC owner (for now)
Feb 04, 2009 (1:44 pm)
I could use a copy of the letter i never got one thanks.
#156 of 671 Re: hopegmc [puregreen]
Feb 06, 2009 (11:36 am)
If I can get a fax number and name, I will send it to you.
Feb 07, 2009 (1:05 pm)
Dont have a fax will try to get one.
#158 of 671 Re: Drivers power window, door locks stopped working [HopeGMC]
Feb 07, 2009 (6:52 pm)
I have a 2004 colorado crew cab with the same problem with the locks and drivers window. On dec 26th I decided time for a new battery and which I replaced and that's when this problem started. Could this problem come from just disconnecting the terminals?
Well thanks to HopeGMC it's working again. I took it apart and looked at everything and things looked OK so I tapped the relay and put everything back togather and wow it worked. A GMC/ Chevy repair......
My hats off to HopeGMC thanks alot. What is the BCM and TSB. Just for reference I might need later. Thanks again... ZIPY
#159 of 671 Re: Drivers power window, door locks stopped working [zipyz28]
Feb 08, 2009 (6:36 am)
Zipy, glad to hear you're up and running again...
BCM and TSB are acronyms for "body control module" amd "technical service bulletin".
#160 of 671 Re: Drivers power window, door locks stopped working [leadfoot4]
Feb 08, 2009 (6:32 pm)
Thanks for the info leadfoot4. BCM & fusebox be the same?
#161 of 671 Re: Drivers power window, door locks stopped working [zipyz28]
Feb 09, 2009 (5:45 am)
"Zip", no, those are seperate components. The BCM and the ECM or PCM (Engine Control Module and Powertrain Control Module) are the main computers in the vehicle.The ECM controls the engine's functions, and depending on how complicated the vehicle, it may be just a subsystem of the PCM. The pcm would then control the transmission, transfer case, and in some cases, the rear axle, if it's an electrically controlled limited slip. The PCM also interfaces with the ABS system.
The power to all of these systems comes from the battery and charging system, via the fuse box (for protection).
Sometimes I long for the simpler days of "points and condensors"......
#162 of 671 Re: Drivers power window, door locks stopped working [leadfoot4]
Feb 09, 2009 (8:05 pm)
leadfoot4.......ECM I know. didn't know it was PCM also. This is the first I've heard of BCM. Learning curve..........Thanks.......Zipy
#163 of 671 Re: Drivers power window, door locks stopped working [HopeGMC]
Feb 10, 2009 (2:57 pm)
Thank you HopeGMC. I talked about taking the truck in 2 months ago, but still never found the time, and because my other car has been buried under 2 ft of snow. I tried the relay thing today, and as soon as I put it back in the truck, everything started working again. So you saved me more inconvenience, and probably some money... Well at least for now... But thanks for the tip, it was greatly appreciated... It will be so nice to have power door locks again, AND TO BE ABLE TO GO TO A DRIVE THROUGH, OR ATM....