LTZ Seat Swap

[rlr02]

Title should be "LTZ Seat Swap" I don't see how to change it......

I'm currently building a 1977 K5 for my son's first truck. I picked up a set of leather LTZ seats from a 2010 Suburban, fronts and 3rd row. I'm trying to figure how to wire the driver seat heat. Anyone done this swap and have the heat working? Does anyone know how to wire in the temperature sensors?

Here's what I've figured out so far:

Driver seat
- Larger gauge red/wht and smaller gauge red/wht are power (+)

- Larger gauge black is ground (-)

- This makes the forward, backward, up, down, recline, and lumbar work.


Passenger seat
- larger gauge red/white power (+)

- larger gauge black negative (-)

- larger gauge dark blue power (+) for heat butt/back

- larger light blue ground (-) for back

- larger gauge pink ground (-) for butt

 

[shady]

Should be a little box with like 3 dots under the title, click it and it should say 'edit thread'. That lets you edit the title.

As for the seats... I have no clue, but I'll be watching because I want to do something similar.

 

[rlr02]

I don't have the 3 dots, and now I don't have the option to edit the original post. Maybe it's a member only option? This kids is why proof reading is important! Lol! Maybe it will help draw attention to the post!

 

[Wes Harden]

I fixed for ya

 

[muddybuddy]

Havent done it, but plan to swap in heated seats from newer silverado so will be watching how it works out

 

[Wes Harden]

Yeah I have been keeping an eye out for some Silverado electric adj, heated middle fold down for my 77.
I have access to 03 suburban seats, only the drivers is electric, and no center fold down. Is my fall back plan. They need new covers too.

 

[rlr02]

So here is what I found and did to make the seats function:

Driver seat

Movement
Pin A7 Red/White wire and Pin B6 Red/White wirw - 12v + constant

Pin B8 Black wire - ground

Heat:

I added 2 relays and mounted rocker switches on the side of the seat. I'm using the relays to close the contact to the ground.

Pin B7 Dark Blue wire - 12v + ign.

On the module under the seat on the black plug:
Pin 6 Light Green wire top row - Butt ground
Pin 8 Purple wire bottom row - Back ground


Passenger seat ( I forgot to get the pin placement, but it is easier to figure out)

Movement
larger gauge Red/White wire - 12v + constant

larger gauge Black wire - ground

Heat:

I added 2 relays and mounted rocker switches on the side of the seat. I'm using the relays to close the contact to the ground.

larger gauge dark blue power (+) for heat butt/back

larger light blue ground (-) for back

larger gauge pink ground (-) for butt

One both seat harnesses I removed all the extra wires, I figure I'll never make memory work and they just have one temp setting.

To mount the seats I cut peices of 1/4" plate and drilled holes to line up with the factory threaded seat mounting holes. The driver side lines up with the 2 holes towards the center with a little burr bit adjusting to the mounting holes on the seat. I just drilled through the plate and the floorboard for the outer 2 bolts. For the passenger side I altered a set of manual seat slides, mounted them to the plate, then mounted the seats to the slide. This makes it so you can manual slide the seat forward then move it electrically to get enough room to get in the back seat.

For rear seats I used 3rd row seats out of a 2009 Yukon with brackets from eBay.

I can't attach pictures, but I cross posted this on gmsquarebody.com and have pictures posted there.

Hopefully, this helps others with the same type project.

 

[muddybuddy]

Looks nice, thanks for posting the wiring that worked!

So the extra wires would have been for various levels of heat for both butt and back and memory? Makes sense. Do you know if you got the full heat setting for both butt and back?

 

[rlr02]

The extra wires should be for driver side memory, 3 levels of heat, seat belt, seat pressure sensor, etc. I just figure these seats are not coming out of this thing, so I didn't want the extra wires for no reason.

I believe the passenger side is full heat. Driver side I'm not so sure, they take longer to get warm. The seats came from a junk yard, so I can't garuantee how well they truly worked before. I didn't replace anything, so I could have faulty heat pads. I'm also running everything off a battery just sitting in the floorboard because the truck doesn't have an engine or front clip on it.

I could not find any pinouts or diagrams to match the wires for the driver seat. So I hooked power to the dark blue wire, assuming it would match the passenger side. Then I put my volt meter on the battery and started grounding each wire until I'd see a voltage drop, making the assumption if it dropped it was a draw from the heat pad. Then waited for it to heat up. The 2 wires I used were the only to that I could make work. I don't know how the factory switch works to make the 3 heat ranges.

 

[Wes Harden]

I just scored a pair of power seats from a 04 burb. Will be installing in my 77 burb. The 04 floor was basically flat, 77 burb not so much. What have you done for mounting brackets ?

 

[Timgoheen]

I just bought a set of seats from an 11 suburban ltz. I bought the console too. Im looking for ways to mount them. Merricks stuff looks nice, but a little more than I would like to spend. How did you find those rear brackets on ebay ? I can weld stuff too if there are any kits like that available.