Heated Seat Install-Need Help ASAP

Trav_13 · December 4, 2011

I am installing GM Accessories Heated Seat Kit and am having some trouble....the instructions are horrible!

Anyway the Truck is a 2007 2500 HD Duramax Crew Cab 4x4 LT with Leather

The Kit is the GM Accessories Kit that is brand new in the box, with the Dash Mounted Switches.

1. I am having trouble confirming, which element plugs into which part of the seat harness, GM didn't label which plug went to which element making this a complete pain, especially if you are wanting to hide the wires when doing the installation. (For Example, how do I know I have the elements hooked up correctly to know which command will be done when I press the "back only" heater button???)

2. I have ran all the wires and made the connections, however I am confused about the connections that go to M3, and also the extra wires. I have attached a picture below, and I see one plug(2 Pin Plug with Yellow Wire), and then there is a standalone yellow wire just hanging out, then there is an additional plug (2 Pin Plug with Purple Wire w/White Tracer), and then there is another standalone Purple Wire w/White Tracer just hanging out.....where do these extra wires go? The instructions say to reference "Service Procedure 1706444"...

Overall the seats are done, and look nice, however I'm unsure if the elements are hooked to the seat properly, and also I'm confused about what to do with these wires...can anyone help? The truck is in the shop and tore apart, I'd like to finish up tomorrow if possible!!

pjp · December 4, 2011

There's a long forum topic at:

http://www.gm-trucks.com/forums/index.php?showtopic=78133&st=60

If I remember correctly, everything but the seat elements were made to go to a specific plug based on different tabs or shapes. The switches also have to go in just one way so they control the correct element. The instructions are poor, but I made a "word" document as I went along, just send me a personal note with your email address.

dwgr · December 5, 2011

I had the dealer install mine. On the drive home I turned on the driver's side back and the seat bottom warmed up. I took it back and it took them less than five minutes to fix the problem so think they switched the connectors around under the seat. Hope that helps.

&CDFiXER% · December 5, 2011

IIRC, those wires go with the empty connector that comes with the kit. The service procedure, I think, simply refers to how to populate the connectors.

On the pages I scanned I left some hand written notes,maybe they will help? (the thread my info is in is referenced above). I also have some stuff here that maybe of help (from the post above):

The two connectors are labeled M3 in each 56-wy connector. The pictures suck here very bad. There is an M1 row of pins on the junction block to help you locate M3 (third pin on row M). One of the 56-way connectors has a yellow wire and one has a purple wire. The instructions warn to only do one at a time but they are wire tied to the wires feeding each connector so unless you are color blind (and I am a little) you can not screw this part up. To remove the wires and connectors, use the small screw driver or pick to pop off the red plastic 'banjo' lock that is securing the pins in the one side of each 56-way conenctor. These red locks will simply pop and slide out. This is very important as the electrical connectors will NOT come out without the locks being released! Once the red locks are released and laying safely out of the way, then you can use the small screw driver on the front of the 56-way connector to lightly push the other release, it is very easy really. The yellow and purple wires you have released then go into two small electrical connectors supplied with the kit. The wire contact ends themselves will slide into the plastic connectors easily, you will feel a tiny click. You can then slide a gray (on my connectors) lock over the wire and it will be locked into the electrical connector. IMPORTANT: It might be helpful to match up the connector cavity needed to the matching plug on the new harness! The supplied connectors have two holes each but you only use one on each. Pictures 38 & 39 show the connector and lock, although mine was shaped slightly different and the lock was not able to be released fully from the connector, it simply slid into place to lock. Both of my new connectors/matching harness connectors are behind the big junction block, there is plenty of room.