Swap out seats

blownZ71 · March 13, 2017

Probably be too much an under taking to replace the harness so I would either bypass the connector, find the wires on the seat side harness I needed and tie them in or add the pins to the body connector. Most of these connectors can be split apart and pins added or removed, it's just a matter of getting the right size. I'll try to dig deeper and see what stands out. Are you wanting just electric seats or are you trying to get memory seats too? This goes from simple to complicated fast. Some of the pins that show not occupied are probably for options not listed on the standard pin out like the haptic feedback motors.

At this point I would just be happy with power. I have no interest in the memory function but would like to maybe get the heat and cool functions working at some point with help from your other thread once you finalize your thoughts on that. Yes any help with how to add pins to my body side harness would be great. Thanks

Darth_Vader · March 13, 2017

At this point I would just be happy with power. I have no interest in the memory function but would like to maybe get the heat and cool functions working at some point with help from your other thread once you finalize your thoughts on that. Yes any help with how to add pins to my body side harness would be great. Thanks

Okay, let me try and see what would be the easiest way to get the seats powered up and we will go from there.

blownZ71 · March 13, 2017

Okay, let me try and see what would be the easiest way to get the seats powered up and we will go from there.

Awesome, thanks Mr. Vader.....with the way this is going, I see myself switching to the Dark Side !!!!!!!!

Static · March 13, 2017

If you were really going to get wild in the future you could replace the body side harness with LTZ / Denali harness then as you go to add things later on that might make it easier. I dont know this but it seems like it would be a step in the right direction if you were going to "Pimp Your Ride" at some point.

blownZ71 · March 14, 2017

Any idea why I would have been getting an airbag error when I tried the passenger seat on the existing harness?

Darth_Vader · March 17, 2017

Any idea why I would have been getting an airbag error when I tried the passenger seat on the existing harness?

No clue, double check all your connections. Might need to pull the seat and make sure something hasn't happened to where the airbag ties into the seat connector. My guess is it's not seeing the bag for some reason.

pgamboa · March 17, 2017

I wonder if the airbag sensor circuit is on the same pin location between the seats and connectors?

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Darth_Vader · March 17, 2017

I wonder if the airbag sensor circuit is on the same pin location between the seats and connectors?

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I was wondering the same thing Phil, but from what I have seen they tend to keep the circuits on the same number. But given that the Denali/LTZ seats have so many extra it could be something crazy like a different wire pair on the connector.

67ChevyRedneck · July 11, 2017

So, I've done a lot of reading, and some googling, and haven't found an answer quite yet.

I have a 2015 DC 2LT Z71 with cloth seats. I just ordered a katzkin interior kit (I've done a few interiors before, should be cake for me), but I have a question on seat power.

My DS has full power controls (no heat or air). The PS is full manual and my wife has made a few comments on the lack of lumbar support (I mean really, on a 2LT??? My 00 Z71 LS had PS lumbar). So I ordered a stripped down frame from a 2016 with power seat motors and lumbar support (its the full frame with no cushions/cover). I can swap everything over when I do the leather covers.

Does anyone know if this will be plug and play for power, or do I simply need to supply power/ground for the motors to work. This thread is packed full of confusing info on heaters, a/c, and BCM stuff.

Seat frame and leathers should be here by next week. I paid the 2015 off a couple months ago and its upgrade time!

Edited July 11, 2017 by 67ChevyRedneck

67ChevyRedneck · July 12, 2017

I may be in luck. The seller is including the attaching harness and it appears that there is a large red power and a large red negative wire going into the harness on either end.

I popped the cover on my seat and unlatched the harness, and sure enough, on the body side in the spaces where those wires appear to be I have a large and medium sized spade, but when I look at the seat side of the harness, my seat has blank spaces (no pins) where the large and medium sized spades are, so hopefully, those are the power and ground wires and it will be plug and play. Fingers crossed, I'll find out next week.

Edited July 12, 2017 by 67ChevyRedneck

Viktorrocks15 · July 16, 2017

I recently bought 2017 High Country seats with all the options from a guy. Previous to buying the seat I bought a stereo trim piece with the heated/cooled buttons, my truck had cloth with heated seats only. So I installed the seats and to my surprise the cooled button actually activated my passenger vented motor, just plug and play. The problem is that the driver side is not working because pgamboa noticed some power wires missing to actives the power for the movement, heating and cooled. He's currently working on my driver seat, but just so you guys know passenger side is fully working except the driver. Once we figure out( I mean pgamboa lol) we'll let you know. Hope it makes sense. By the way my truck is 2015 Silverado LT

I'll post some pictures maybe a video.

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67ChevyRedneck · July 17, 2017

I received my power seat frame on Saturday and pulled the PS seat last night and set the frame in and plugged it in.

All power motors worked including the lumbar. Very happy. I haven't taken the PS seat apart yet, so I don't have the airbag connected and I got an email from OnStar to bring my truck in for service immediately!

My power seat frame is front/back, seatback, and lumbar. Current seat in my 2LT was all manual.

Edited July 17, 2017 by 67ChevyRedneck

67ChevyRedneck · July 24, 2017

Turns out my airbag light was a little more serious than I had thought.

Apparently GM didn't keep things simple, as has been discussed in this thread.

The 2016 seat frame I bought had a power base, seatback, lumbar, AND heated seats (I only got the frame, so no cushions or heated seats, but the plugs and control module were there.)

So I plugged it in, all the power stuff worked, cool, right? But my SRS light was on. Crap. Maybe it just tripped the code and needed to be cleared?

I finally had time to really put the two seat frames side by side and compare. On my manual seat, the SRS system (airbag, seatbelt, weight sensor, and seat position sensor) were all obviously a stand a lone system with the seat position sensor being located on the inner seat track at the front.

I couldn't quite figure out what was going on with my power seat, so I labeled all the clips and unwrapped ALL the wires.

What I discovered:

The power seat system is a stand alone system. It's its own harness (power base, seatback, and lumbar) and all the power stuff needs is a big + power wire to #12 on the seat connecter and a fat - wire to #11 on the seat connector. That's it. And luckily, the body side of my seat connecter was set up for this, more on that in a sec. There are NO other wires associated with the power seat or lumbar motors that go to the seat harness connector other than the fat + and fat - wires. That's it.

On seats with heaters, (and possibly cooled, not sure as this wasn't a cooled seat), the SRS system is INTEGRATED with the seat heater system. The biggest thing being the seat positon sensor was part of the heater control box. That's why my SRS light was on, that and the wiring didn't match up to my seat's body side wiring. So apparently, this is the issues others have been talking about with heated seats having a different seat connector and body control module, etc.

So, what did I do?

I swapped my entire SRS system over to the new power seat frame. The entire wiring harness for the airbag, seatbelts, position sensor (the correct bracket in the correct location was even on the new seat, just unused, VERY important for the sensor to go to the same location) and I swapped the weight sensor system too, even though they did appear to be exactly the same.

So now all my SRS stuff worked again, all warning lights off and gone, but now the power seat had no power. No biggie. The body side harness did have power and ground to terminals 11 and 12, I just had to drill them out in the seat connector and push them in. So now I have a power seat that works and an SRS system that works in a truck that originally only had a PS manual seat.

This is a pic of the integrated SRS system/heated seat system. The black box you see controls the seat heaters and is also the seat position sensor for the SRS system, which is why it wouldn't work in my truck, because my truck doesn't have a BCM that works with this stuff, I can't use it, so NONE of this is going back into my truck. It now works properly with the old harness and a + and - power wire!

Edited July 24, 2017 by 67ChevyRedneck

blownZ71 · July 28, 2017

Turns out my airbag light was a little more serious than I had thought.

Apparently GM didn't keep things simple, as has been discussed in this thread.

The 2016 seat frame I bought had a power base, seatback, lumbar, AND heated seats (I only got the frame, so no cushions or heated seats, but the plugs and control module were there.)

So I plugged it in, all the power stuff worked, cool, right? But my SRS light was on. Crap. Maybe it just tripped the code and needed to be cleared?

I finally had time to really put the two seat frames side by side and compare. On my manual seat, the SRS system (airbag, seatbelt, weight sensor, and seat position sensor) were all obviously a stand a lone system with the seat position sensor being located on the inner seat track at the front.

I couldn't quite figure out what was going on with my power seat, so I labeled all the clips and unwrapped ALL the wires.

What I discovered:

The power seat system is a stand alone system. It's its own harness (power base, seatback, and lumbar) and all the power stuff needs is a big + power wire to #12 on the seat connecter and a fat - wire to #11 on the seat connector. That's it. And luckily, the body side of my seat connecter was set up for this, more on that in a sec. There are NO other wires associated with the power seat or lumbar motors that go to the seat harness connector other than the fat + and fat - wires. That's it.

On seats with heaters, (and possibly cooled, not sure as this wasn't a cooled seat), the SRS system is INTEGRATED with the seat heater system. The biggest thing being the seat positon sensor was part of the heater control box. That's why my SRS light was on, that and the wiring didn't match up to my seat's body side wiring. So apparently, this is the issues others have been talking about with heated seats having a different seat connector and body control module, etc.

So, what did I do?

I swapped my entire SRS system over to the new power seat frame. The entire wiring harness for the airbag, seatbelts, position sensor (the correct bracket in the correct location was even on the new seat, just unused, VERY important for the sensor to go to the same location) and I swapped the weight sensor system too, even though they did appear to be exactly the same.

So now all my SRS stuff worked again, all warning lights off and gone, but now the power seat had no power. No biggie. The body side harness did have power and ground to terminals 11 and 12, I just had to drill them out in the seat connector and push them in. So now I have a power seat that works and an SRS system that works in a truck that originally only had a PS manual seat.

This is a pic of the integrated SRS system/heated seat system. The black box you see controls the seat heaters and is also the seat position sensor for the SRS system, which is why it wouldn't work in my truck, because my truck doesn't have a BCM that works with this stuff, I can't use it, so NONE of this is going back into my truck. It now works properly with the old harness and a + and - power wire!

Based on your experience, I would like your opinion on what I should do and what I can expect to work. I have a regular cab SLE with manual seats for both DS and PS. I also have a pair of Denali front buckets with all options. When I tested them with and attempt to plug and play, nothing worked at all, no power, and airbag light no dash. Any suggestions?

67ChevyRedneck · July 28, 2017

Oh wow. You might not have any power hook ups?

I think you have a typo, did you mean to say the airbag light is on? Do regular cabs have side curtain airbags?

See my pic below, if you have the spades to #11 and 12 you *should* at least have power to the seats.

Look at your seat plug and see if these are there if you pull the plug back a bit, they're obvious, one is a fat red wire and the other is a fat black wire. These provide power for the seat controls (base, seatback, and lumbar):

I just don't know. Reading other's posts in this thread you might need the BCM and wiring from the denali???

I was able to get mine to work by deleting the heater seat stuff, reusing all my OEM SRS sensors, wires, and equipment from my old seat onto my new and plugging the power wires into ports #11 and #12 on my "old" seat harness connector.

Looks like GM went from making everything plug and play to actually having different harnesses and BCM's!

Edited July 28, 2017 by 67ChevyRedneck