Swap seats into 2013 LT Avalanche?

2013 CHEVROLET AVALANCHE
140,000 MILES • AUTOMATIC
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CHURSIN
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Hi,
I am attempting to swap seats from LTZ (2011) (please note that LTZ is assumption) into 2013 LT Avalanche. So far I got door handles with heated seat switches and floor wire harness from 2010 GMC Yukon.
I am pretty sure I can use some part of wiring harness from donor and trace where the wires should be connected and add/swap pin in connector(s) where and if needed.
I know I will need to re-program BCM, what I am not sure is - who does that and what ask of person/shop that would be doing programming.
I tried to compare PRO codes and can not clearly identify what RPO code adds seat memory and heated seat module (the black module under driver seat).
Jul 1, 2026 at 5:37 PM
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STRAILER
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So the main RPO codes you are looking for are generally:

A45 — Driver-seat memory
KA1 — Heated front seats
KB6 — Heated and cooled front seats, when equipped

The black module beneath the driver’s seat is the Memory Seat Module, sometimes identified in service information as the K40 module. The best donor is a 2011–2013 Avalanche, Tahoe, Suburban or Yukon with an option list closely matching the recipient vehicle. Obtain the donor VIN and full RPO list, because a programming shop will likely ask for both the donor VIN and the Avalanche VIN. Here are the seat wiring diagrams to make sure the doner seat have the correct connectors and wiring colors which is a must when doing this kind of swap. Check out the images (below). Please let me know what happens.

Jul 2, 2026 at 2:09 PM
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STRAILER
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Did this help?
Jul 3, 2026 at 3:13 PM
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CHURSIN
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Yes and I was trying to add more questions and for some reason can not?
Jul 3, 2026 at 4:04 PM
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CHURSIN
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Hi,
Thank you for those images.
When I removed the seat wiring harnesses from the 2010 Yukon, the driver and passenger seats were still installed in the SUV. I compared the part number of the driver seat module from the 2010 Yukon to the module on the 2011 Avalanche donor seat, and the part number was the same: P/N 20870474. That led me to believe that the wiring harness from the 2010 Yukon should work with the seats from the 2011 Avalanche when installing them into my 2013 Avalanche LT.
Jul 3, 2026 at 4:06 PM
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CHURSIN
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I also confirmed that both the 2010 Yukon and my 2013 Avalanche LT have the same module in the center of the floor, PN 13579116.
I was able to find the 2010 Yukon VIN (1GKUKDE04AR160816), but decoderpo.com does not list any of the RPO codes you provided. Are there any other codes, such as package codes, that may combine or hide those options? Also, is decoderpo.com considered an accurate and reliable source?
Jul 3, 2026 at 4:07 PM
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CHURSIN
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My other question is whether you are able to provide seat connector pinout diagrams. I believe I need the diagrams for connectors X303 and X305, which were shown in the images you provided. I want to make sure that I connect the seat belt buckle switch, passenger presence sensor, and seat position sensor correctly.
In both my 2013 Avalanche and the 2010 Yukon, the GM P/N 13579116 module is the same and uses two yellow connectors. I traced the non-power wires from the seat connectors in the 2010 Yukon harness and found that several of them go to the 13579116 module. I would like to make sure that I connect those wires to the correct locations in my 2013 Avalanche.
Thank you.
Jul 3, 2026 at 4:07 PM
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CHURSIN
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ok I think I figured it out your message system does not like urls and my previous message never got posted, sorry I had to split my reply in multiple messages. decoderpo.com was https : // decoderpo.com (without the spaces) in my previous message and the reply was rejected.
Jul 3, 2026 at 4:09 PM
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STRAILER
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Hmm, I think there was an error on the site but it is working now, did you receive an email message for my response?
Jul 3, 2026 at 5:15 PM
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CHURSIN
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Yes I did.
Jul 3, 2026 at 6:00 PM
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STRAILER
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Okay, they don't give us the pin outs in AllData, but I did give you the seat wiring diagram above. Let me know if you need more and how it goes.
Jul 3, 2026 at 6:25 PM
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CHURSIN
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On Yukon 2010 harness there is blue connector that connects to power box under dash, the wires from that circuit run into driver seat... 2013 truck does not have blue connector in power box under dash on driver side. Is there way you can find what that blue connector used for in Yukon 2010? I suspect pedal position.
Thanks
Jul 3, 2026 at 7:18 PM
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STRAILER
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Can you upload an image of the connector and the wiring so I can see it?
Jul 4, 2026 at 2:20 PM
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CHURSIN
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I have made some progress and plan to add a write-up once I am finished. The blue connector is X13 (Junction Block - Left I/P X13 (JF4 with AN3)). The challenge is that, in the Avalanche, the junction block has only one pin in the X13 connector. I am pretty sure I will need to replace the junction block with one from a donor vehicle.
Does AllData have wiring diagrams for the Adjustable Pedal system both with and without the AN3 option?
Another thing I have not been able to find anywhere—whether in the Haynes repair manual or online—is the torque specification for the nut that reattaches the seat belt to the seat. I know that the front seat nuts (at the front of the seat) are 41 lb-ft, and the bolts at the rear of the seat are 66 lb-ft. Depending on where I look online, the torque specification for the front seat belt-to-seat-frame nut ranges from 32 to 41 lb-ft.
Does AllData list torque specifications for seat belt fasteners?
Jul 20, 2026 at 3:16 PM
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STRAILER
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Here is the wiring diagrams you needed for the adjustable pedals.
Jul 20, 2026 at 8:50 PM
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STRAILER
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Here is the torque specs for the seat belt, thanks for the getting back to me, I am interested on how this turns out.

52 Nm (38 lb ft).
Jul 20, 2026 at 8:58 PM
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