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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 General Tech Q&A > General

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  #1  
Old 08-12-2011, 09:04 PM
sfrydaddy7's Avatar
sfrydaddy7 sfrydaddy7 is offline
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2006 GMC Envoy SLE XL
Liquid Silver Metallic 4.2L I6 4X4
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No power to driver door.

My 2006 Envoy XL SLT driver side door switches quite working. All the other doors work fine. When you turn the key off the radio shuts off instead of staying on until door is open or 5 min is up. The dome light does not work. The controls for the windows, the locks, heated seats, mirrors, & seat memory all do not work or light up at night. The other doors work fine. Ordered a brand new switch module & it did not fix the problem.
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  #2  
Old 08-12-2011, 09:14 PM
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the roadie the roadie is offline
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2004 GMC Envoy SLT "Roadiemobile"
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New switch modules need to be dealer-programmed at extra expense to mate up with the vehicle. That's why we strive to buy used ones instead.

Or you have a simple broken/flexed wire at the hinge line of the door. A data comm wire fault could cause those symptoms.

Did you determine FOR SURE that it was the DDM (driver's door module) at fault by temporarily swapping in the one from the passenger's door?
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  #3  
Old 08-12-2011, 10:44 PM
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sfrydaddy7 sfrydaddy7 is offline
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2006 GMC Envoy SLE XL
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Not for shure if it is the DDM or not. Window was left cracked over night & it stormed. Wife went to leave for work in the a.m. & it would not unlock. Thought it would dry out but when she got home still nothing. I checked the DDM fuses under the rear & it was good. SO I swapped the driver & passenger DDM fuses, still nothing. Then I popped out the DDM, disconected wire harnesses no water, so then I open up the whole switch still no water but it had that hot/burnt electronic smell & a lil char spot on the green board. Went to go get a used switch for a $100 bucks but the switches weren't the right ones & they told me they can't keep that type in because they are a hot item. Found brand new DDM online for only $37 more and figured that was the better route. Your advice is greatly appreciated.
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  #4  
Old 08-14-2011, 02:00 PM
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sfrydaddy7 sfrydaddy7 is offline
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2006 GMC Envoy SLE XL
Liquid Silver Metallic 4.2L I6 4X4
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No Luck

I went through the Envoy again looking for broke or wore wires, fuse boxes, or anything else & still can't find nothing. Found on other fourms that there is about four to five other guys out there with the same problem. Lil tight on cash right now so I'm trying to figure this out myself instead of taking it to the dealer but it looks like it comming down to that. Just don't understand why the dome light and radio could be tied together with the DDM if that is what is it. Anyone have anything on this!?
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  #5  
Old 08-14-2011, 02:12 PM
trout trout is offline
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I've had an ongoing problem with the DDM that the dealer couldn't figure out either. It's very intermittent, and more likely to happen in the colder months.

I don't think it's related to yours but I when it does happen I have the same issue with the radio turning off right away. I think it has something to do with how retained access power works, probably the BCM can't tell if the door is open or closed w/o communication from the DDM so it just shuts it off.
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  #6  
Old 08-14-2011, 03:00 PM
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I mentioned three very specific issues in my post #2.

1) If you found a new one and it didn't work, it's probably because it needs dealer-programming or it's dead. If you can't find a used one, paying the dealer to program this one may be your cheapest way out.

2) You said you looked for broken wires, etc, but the most common way for a wire to fail near a door or liftgate hinge is by INTERNAL flexing that breaks the conductor but leaves the insulation looking OK. Not sure how you determined all the wires were OK without measuring continuity with a meter and a couple of pins to pierce the insulation on either side of the hinge area. Did you do that?

3) The #1 way to make sure it's the DDM is to put the PDM INTO the driver's door and see if any of the functions work. And vice versa. Not move the fuse, but the switch module. Did you do that?
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  #7  
Old 08-15-2011, 05:08 PM
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2006 GMC Envoy SLE XL
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Feel like a dumbass on this one, but a a very big THANK YOU out to the roadie. Switched the PDM and the DDM and the driver door worked. Passenger didn't with the driver DDM. Thought about it but just never tried it because of an open conection with the DDM & the PDM not having the same functions. What a relief on not being out $140.00 for the DDM & just needs programed.
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  #8  
Old 09-03-2011, 09:17 PM
evotuner evotuner is offline
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2003 Chevy TrailBlazer LT EXT
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Having exact same problems, 2003 LT EXT. Drivers side is dead. Swapped DDM w/ PDM, dead as well (DDM worked on PDM side). Swapped fuses, nothing. Swapped relays...Worked all the sudden. Then quit, then worked, then quit for good lol. Guess I am gonna have to start checking wires. NO fun.
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  #9  
Old 09-15-2011, 09:35 AM
evotuner evotuner is offline
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2003 Chevy TrailBlazer LT EXT
Summit White 4.2L I6 4X4
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Ok, there is a plug with all 4 wires that are all thicker then the rest of the wired plugs. I am assuming this carries the 12V (pink wire). I am getting 12V to the DCM, but the DCM is completely dead. Any suggestions? Thanks
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  #10  
Old 09-15-2011, 11:33 AM
paul0607 paul0607 is offline
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2004 GMC Envoy SLE XUV
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Check the drivers door harness between the door and the body pillar where it bends. Common for wires to break there. You will usually see the insulatin broken on the wires before it fully breaks. Roadie also suggested you look there previously.
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