Swap out seats

blownZ71 · July 31, 2017

Unfortunately I do not have pins #11 or #12.

Are you saying you were able to add these pins to the body side of your harness? The regular cabs do indeed have side airbags in the seats. When you say you reused all your OEM SRS equipment, did this require disassembly of the entire seat, or just swapping it over underneath the seat. At this point if I could just add power to the seats so they would work and not have the airbag light on the dash I would be happy.

67ChevyRedneck · July 31, 2017

Yes, the pic I attached is the body side harness of my truck. I guess because my DS seat had power, the PS was wired for it? That really sucks. You're going to have to get + from somewhere and add a ground.

I added the + and - from the new seat motor wiring harness to my seat side harness (I had to drill out the yellow seat connector holes in those slots and push the wires in).

In terms of the SRS stuff. Look at your old seats and new seats. I'm going to bet your old seats are like mine where there is a small seat position sensor located on the seat rail towards the front. On the power heated seats it's part of the black box that powers/controls the heaters. You either need to swap all of your SRS wiring and sensors over to the new seats (putting the sensors on the brackets in the SAME spot as they were on your old seats) or get a new BCM and Wiring because I don't believe the SRS wiring matches up (again because the SRS stuff is integrated into the heated seat box). Without doing either of those things I don't think you'll ever get them to work. From what I've read, when the SRS light is on, NONE of the airbags will deploy. Also, to be clear, when I used my old seat harness, I was also retaining my yellow seat plug so the wire connections matched up to my body side plug, I just drilled and added the + and - as I noted above.

You can get to the seat bottom stuff pretty easy, but unfortunately you will have to remove the upper seat cushion to get to the wires in the seat back. It's not terrible, everything un-snaps/unclips.

Edited July 31, 2017 by 67ChevyRedneck

Storm_trooper · August 3, 2017

Can anyone tell me if buying a set of leather heated seats from a LTZ 1LZ with A45 (memory seat function) will interfere with having just power seats? My truck in a 1LT with cloth, power driver, manual passenger non heat. I know I'll have to do some harness swapping on the PS which is fine, I'm just at a stand still on the driver seat not knowing if A45 is going to screw things up.

blownZ71 · August 10, 2017

Can anyone tell me if buying a set of leather heated seats from a LTZ 1LZ with A45 (memory seat function) will interfere with having just power seats? My truck in a 1LT with cloth, power driver, manual passenger non heat. I know I'll have to do some harness swapping on the PS which is fine, I'm just at a stand still on the driver seat not knowing if A45 is going to screw things up.

I think I am probably going to sell my set of front Denali seats if your interested. Does not look like I am going to be able to swap these for my manual seats unfortunately.

They are 14' black denali seats with all options.

Mrfour17 · January 21, 2018

On ‎8‎/‎10‎/‎2017 at 5:29 AM, blownZ71 said:

I think I am probably going to sell my set of front Denali seats if your interested. Does not look like I am going to be able to swap these for my manual seats unfortunately.

They are 14' black denali seats with all options.

were you able to get the power working? I currently have a LT Silverado power drivers seat manual passenger seat. I just bought denali seats and the passenger side was plug and play no problems, but the drivers side I wasn't so lucky. The seat does work because I plugged it into a friends denali and everything worked as should and I don't know where to go from here.

blownZ71 · February 1, 2018

On 1/21/2018 at 3:12 PM, Mrfour17 said:

were you able to get the power working? I currently have a LT Silverado power drivers seat manual passenger seat. I just bought denali seats and the passenger side was plug and play no problems, but the drivers side I wasn't so lucky. The seat does work because I plugged it into a friends denali and everything worked as should and I don't know where to go from here.

No, they have just been sitting. So your telling me that it was a plug and play replacement for your manual passenger seat, but did not work on your driver side power seat? I figured it would be opposite, as both my seats are manual and the Denali seats do not work on either side.

pgamboa · February 2, 2018

Ok guys...For those wanting some info on this why the behavior that is being reported is happening. I had the opportunity to help a local member with a similar swap.

His truck: 2015 LT, Cloth Heated Seats

What he wanted to install: 2016+ LTZ Seats, Heated/Cooled (Ventilated) Seats.

Driver Side - Power Seats from higher trim (LTZ/HC, SLT/Denali) installed on a lower trim truck. The reason the power adjust doesn't work is because the power control commands are interfaced through the Seat Memory Module (A45). Since the lower trim trucks do no have this module, the power adjust circuits are broken. In order to gain power adjust back, you'll have to reroute all the wiring away from the module and direct to the control panel, just as it would on the lower trim, essentially, removing the Seat Memory Module from the equation. Also know that the adjust motors themselves are different. The motors on the higher trim say "Mem" versus "Non-Mem". The "Mem" motors will have extra circuits to support the memory function. 4-pin versus 2-pin.

Passenger Side - Power Adjust on the passenger will be Plug and Play (for the adjust), because there is no "memory" function for the passenger seat. On his truck, there was SRS Airbag issue and that reason was there is there is a Seat Position Module that is NOT present on the LTZ passenger seat. So that had to be added. There is a circuit that we tied into, installed the module, and the air bag light went away.

Seat Cooling - This did not work after plugging in because there are additional circuits that needed to be added and routed from each seat's vent motor to the K29 Seat Heated Control Module. Once these were added, cooled work. The heated button on the radio bezel trim was swapped out for a heated/cooled. The cooled works like factory.

Seat Heating - This did not work after plugging and still doesn't. One the Higher Trim Seats, there is a 4-wire connector that includes power, plus 3 other "reference" signals. On the lower trim, it's a 2-pin, power/ground only. So we haven't had the time to revisit the heat.

So after spending a total 10 days (which seemed like 80 hours total - LOL). We have the seats in, power adjust works, SRS Airbag system is working, and Cool is working. Heat is not working.

There were MANY hours spent on comparing wiring diagrams and circuits between the two. We also had to harvest various terminals, wires, and connectors from the old seats' harnesses to use on the new seats' harnesses.

@Viktorrocks15 - Anything else I left out here?

Hope this helps.

Viktorrocks15 · February 2, 2018

Ok guys...For those wanting some info on this why the behavior that is being reported is happening. I had the opportunity to help a local member with a similar swap.

His truck: 2015 LT, Cloth Heated Seats
What he wanted to install: 2016+ LTZ Seats, Heated/Cooled (Ventilated) Seats.

Driver Side - Power Seats from higher trim (LTZ/HC, SLT/Denali) installed on a lower trim truck. The reason the power adjust doesn't work is because the power control commands are interfaced through the Seat Memory Module (A45). Since the lower trim trucks do no have this module, the power adjust circuits are broken. In order to gain power adjust back, you'll have to reroute all the wiring away from the module and direct to the control panel, just as it would on the lower trim, essentially, removing the Seat Memory Module from the equation. Also know that the adjust motors themselves are different. The motors on the higher trim say "Mem" versus "Non-Mem". The "Mem" motors will have extra circuits to support the memory function. 4-pin versus 2-pin.

Passenger Side - Power Adjust on the passenger will be Plug and Play (for the adjust), because there is no "memory" function for the passenger seat. On his truck, there was SRS Airbag issue and that reason was there is there is a Seat Position Module that is NOT present on the LTZ passenger seat. So that had to be added. There is a circuit that we tied into, installed the module, and the air bag light went away.

Seat Cooling - This did not work after plugging in because there are additional circuits that needed to be added and routed from each seat's vent motor to the K29 Seat Heated Control Module. Once these were added, cooled work. The heated button on the radio bezel trim was swapped out for a heated/cooled. The cooled works like factory.

Seat Heating - This did not work after plugging and still doesn't. One the Higher Trim Seats, there is a 4-wire connector that includes power, plus 3 other "reference" signals. On the lower trim, it's a 2-pin, power/ground only. So we haven't had the time to revisit the heat.

So after spending a total 10 days (which seemed like 80 hours total - LOL). We have the seats in, power adjust works, SRS Airbag system is working, and Cool is working. Heat is not working.

There were MANY hours spent on comparing wiring diagrams and circuits between the two. We also had to harvest various terminals, wires, and connectors from the old seats' harnesses to use on the new seats' harnesses.

[mention=154140]Viktorrocks15[/mention] - Anything else I left out here?

Hope this helps.

Couldn’t have said better.

Sent from my iPhone using Tapatalk

WesternMike · February 2, 2018

I was going to do this two times in the past but failed upon going this route.

I’m in the process of changing the cloth on my seats from factory grey to factory black. Not a cheap mod to say the least lol

I have back done and all head rests, just trying to figure out if I’m going to do heated in the front before swapping the fabric.

Congrats on getting the swap to function properly thus far, hoping the heat will function correctly.

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pgamboa · December 8, 2018

We will be revisiting @ Viktorrocks15 truck next week. We will be doing the full seat memory retrofit on his and during this time, will work on getting full functionality of heat.

When we worked on it the first time, we had to modify the seat harness to make what we could work, work. This involved lots of repining.

So since we are doing memory now, we will restore the seats harness and work on the memory retrofit... in hopes, we will get his working like factory.

One thing to note... he has factory heat.

So adding cooled is a bonus biproduct.

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Akinwa · February 7, 2020

On 1/26/2017 at 6:51 AM, WesternMike said:

Since the guy said if it doesn't work I can bring them back.. I'm for sure going to attempt to put the LTZ leather seats in the WT. I'm for sure adding the centre console as I know that will be fine. With the rubber black floor, jet black interior and a white accent dip for all moulding.. I think this WT is going to be one amazing looking truck.

I'll be starting a build thread for it as soon as I go on days off as I already have rims, tires, tonneau cover, cold air intake, running boards HIDs, 40" light bar(behind grill) ordered.

I have lots more work to be done to it after this but I'll be nick naming this "Western Edition".

The only thing I can't make my mind up about is if I should put the Additive desert chase rack on or not as I can get bran new for $1000CAD right now.. can't make up my mind by the slightest for this.

How did your seats turn out?

Brett Trimming · February 16, 2020

Does anyone know if seats from 2014 to 2018 will fit in a 2013? silverado 3500hd ltz.

Chadsr · May 5, 2025

I am looking to put a set of 2016 GMC heated/cooled seats in a 55 Chevy.

had anyone figured out a stand alone installation yet?

if not, if I get the factory switches and a bcm is it as simple as putting power and ground to bcm and wiring necessary wires? Any help would be greatly appreciated as interior work and I am about done.