Heated/cooled Seat Conversion

rich22 · January 20, 2009

Louie,

I'm in North Florida. Let me know if I can help, if we can ship to a business address it will be significantly cheaper.

Trav_13,

The only wiring was done at the floor harness/30pin seat connectors on each side. All the communications are done via GMLAN, so the wiring in the doors stays the same. I'm doing the writeup now... flashing was kind of a trial and error session... but what works is using a 2009 VIN from a _non-cadillac_ vehicle that has KB6 seats (Can't use cadillac calibrations because the seats are operated by the HVAC controls on the dash, not by door switches). The door window switches and the new MSM have to flashed.

Richard

I'm pretty sure that charcoal and ebony are the color.
If your truck has the AN3 option code, it should be prewired for these seats.

The memory seat module (under the drivers seat) controls all the power/lumbar/heat/memory functions. Making all the functions work requires that you have power windows, the memory/heat seat switch(drivers side) and heated seat switch (passenger side) installed into your door panels, and possibly some programming at the dealership.

If you dont care about making the memory seat recall or heated seat portion work, wiring for the just the power adjustable seat/lumbar is quite simple, just a few hot wires and grounds. Everything for the power movement/lumbar is self contained in the seats.

$900 for both front seats, plus freight. They are basically brand new seats, complete with the memory seat module and all wiring on both sides. I have a purpose-built shipping pallet for them.

I will do a write up on the heated/cooled seat (KB6) install this week and get it posted as soon as possible. I appreciate all the interest.

Richard

stick it into the Tech Wiki

thanks Richard....I'll check my codes, as for freight, what part of the country are you in?

Louie

rich22 · January 20, 2009

http://www.gm-trucks.com/forums/index.php?...icle&id=759

I added the writeup to the Tech Wiki. I have not had time to create a wiring diagram yet, will try to do that this week.

Feedback is appreciated.

Richard

Louie,
I'm in North Florida. Let me know if I can help, if we can ship to a business address it will be significantly cheaper.

Trav_13,

The only wiring was done at the floor harness/30pin seat connectors on each side. All the communications are done via GMLAN, so the wiring in the doors stays the same. I'm doing the writeup now... flashing was kind of a trial and error session... but what works is using a 2009 VIN from a _non-cadillac_ vehicle that has KB6 seats (Can't use cadillac calibrations because the seats are operated by the HVAC controls on the dash, not by door switches). The door window switches and the new MSM have to flashed.

Richard

I'm pretty sure that charcoal and ebony are the color.
If your truck has the AN3 option code, it should be prewired for these seats.

The memory seat module (under the drivers seat) controls all the power/lumbar/heat/memory functions. Making all the functions work requires that you have power windows, the memory/heat seat switch(drivers side) and heated seat switch (passenger side) installed into your door panels, and possibly some programming at the dealership.

If you dont care about making the memory seat recall or heated seat portion work, wiring for the just the power adjustable seat/lumbar is quite simple, just a few hot wires and grounds. Everything for the power movement/lumbar is self contained in the seats.

$900 for both front seats, plus freight. They are basically brand new seats, complete with the memory seat module and all wiring on both sides. I have a purpose-built shipping pallet for them.

I will do a write up on the heated/cooled seat (KB6) install this week and get it posted as soon as possible. I appreciate all the interest.

Richard

stick it into the Tech Wiki

thanks Richard....I'll check my codes, as for freight, what part of the country are you in?

Louie

SLESierra · January 20, 2009

what if you just have the LT2 option with power adjust? What all would be involved here?

GoldBourbon · January 20, 2009

Richard

my truck doesn't have the AN3 code...if I understand you correctly, I could still get the power movement/lumbar by just getting power to the seat? ...are there 2 versions of the lumbar movement?.. can you enlighten me on that and tell me which version your's is?

thanks

rich22 · January 20, 2009

08Z,

I think LT2 trucks have a different door panel configuration, with the door handle itself located underneath the door arm rest. The power window switches are a different shape, though they might be the same electronically - I simply do not have a way of knowing. Best case, if the switches are the same, you'd have to create a spot within about 9 inches of the power window switches to mount the heated/cooled seat switch (thats how long the pigtails are that plug them into the door window switches). Then you'd bolt the seats in, and have to make the the memory seat module wired into the GMLAN network properly... I'm not saying its impossible, but it would involve a little bit more fabrication than a truck that already had LTZ interior. Alternatively, you could purchase new door panels, and essentially upgrade your interior to LTZ. Then everything would fit where it needs to.

what if you just have the LT2 option with power adjust? What all would be involved here?

GoldBourbon,

There are 3 different power seats (that I know of) that came in our trucks.

The first is the LT2-style 6 way power adjustable seat. It can move back and forth, and move the front or rear of the seat cushion up or down. Seat back recline and lumbar are manual.

The second is the LTZ style seat, which features 12 way power adjustments - back and forth, seat cushion front and rear up and down, seat back power recline, lumbar in and out, and lumbar up and down. The seats I have seen with these features usually are heated also.

My old seats are of this design - charcoal leather, 12 way power, and heated w memory recall.

The third seat is the full KB6-optioned heated and cooled seats, they have all the features of the previous model but also the active heating and cooling systems.

If you have a fused 12v source, and a ground, I believe you can have all the power and lumbar features in the seats operational. Accordingly, I will bench test the seats I already have out of my truck to make sure this is the case and let you know for sure.

Edited January 20, 2009 by rich22

GoldBourbon · January 20, 2009

"If you have a fused 12v source, and a ground, I believe you can have all the power and lumbar features in the seats operational. Accordingly, I will bench test the seats I already have out of my truck to make sure this is the case and let you know for sure. "

thanks for the seat info Rich...I'm definitley curious if the heat feature could be powered up also but the memory feature's not that important

Louie

rich22 · January 21, 2009

It would be possible to wire a toggle switch that would turn on the heated seat elements directly, however, you'd also have to turn them off before they got too hot... one of the things the memory seat module does (in the heated only seats) is monitors the temp of the seating surfaces, and cycles power to the heating elements to maintain the desired level of heat. Making the heat part work like it was designed to from the factory would involve the power window switches being programmed, and the heated seat switch being installed in the door panels. Not impossible... but if you are going that far, you'll get the memory functions anyway, as the driver side heated seat switch also contains the memory seat buttons.

"If you have a fused 12v source, and a ground, I believe you can have all the power and lumbar features in the seats operational. Accordingly, I will bench test the seats I already have out of my truck to make sure this is the case and let you know for sure. "

thanks for the seat info Rich...I'm definitley curious if the heat feature could be powered up also but the memory feature's not that important

Louie

rich22 · January 21, 2009

GoldBourbon,

Bench tested the seats today, only requires a few wires be tied to a 12v always on source, and a good ground. All 12 power movements, including lumbar functions, work in this configuration.

Thanks,

Richard

Bostonsfavson · January 21, 2009

Way to go Richard, that's a pretty cool mod

eyeball03 · January 21, 2009

I'd be interested in a "how to" also...I have black leather in my recently purchased 08 sierra CC, but no heat.

I've been freezing my ass off the past couple of mornings.

rich22 · January 22, 2009

I'd be interested in a "how to" also...I have black leather in my recently purchased 08 sierra CC, but no heat.

I've been freezing my ass off the past couple of mornings.

Does your truck have memory drivers seat and power windows?

eyeball03 · January 22, 2009

I'd be interested in a "how to" also...I have black leather in my recently purchased 08 sierra CC, but no heat.

I've been freezing my ass off the past couple of mornings.

Does your truck have memory drivers seat and power windows?

Power yes, memory NO

rich22 · January 22, 2009

Is your interior door handle above or below your armrest?

I'd be interested in a "how to" also...I have black leather in my recently purchased 08 sierra CC, but no heat.

I've been freezing my ass off the past couple of mornings.

Does your truck have memory drivers seat and power windows?

Power yes, memory NO

eyeball03 · January 22, 2009

Is your interior door handle above or below your armrest?

I'd be interested in a "how to" also...I have black leather in my recently purchased 08 sierra CC, but no heat.

I've been freezing my ass off the past couple of mornings.

Does your truck have memory drivers seat and power windows?

Power yes, memory NO

Below....

rich22 · January 22, 2009

You'd have to create a spot for the switches... pigtail from the heated switch to the door switch is about is about 1 foot long... 12 pin connector, so it would take a lot of splices to lengthen it, but it could be done if you wanted to mount them somewhere besides the door panel.

If you can, pull your drivers door switch out (should just pop straight up, carefully pry around the edges) and see if there is an empty connection on the bottom of the switch, 2 rows of 6 male pins.