I just recently bought a 2004 GT1, I love it, I have already upgraded to a 5 button DIC i pulled from a car at the local scrap yard. The donor car also has heated leather seats which I plan to pull soon since I know all the wiring is the same on this generation. I do have a question though, The donor car has a digital dual climate control where as the one in my GT1 is the basic analog...is all of the necessary components in my GT1 installed already to be able to use the one out of the donor and have dual climate in my GT1 if I use the one out of the donor car?
2004 gt1
- Thread starter aekuhns
- Start date
FriboRage
New member
Unfortunately, it’s not just a simple unit swap.
There are a bunch of sensors that need to be added/changed over as well as a couple of control modules. I’ve never done it, but it seems like way more work than it’s worth.
Here’s some reading on it:
ClubGP Message Forum troubleshooting
There are a bunch of sensors that need to be added/changed over as well as a couple of control modules. I’ve never done it, but it seems like way more work than it’s worth.
Here’s some reading on it:
ClubGP Message Forum troubleshooting
the seats will be easy to swap but don't expect the seat heaters to work. I just went through this with my 2007 GP thinking it would be easy since all the wires are there already but its not. the seat heaters are BCM controlled and your BCM will not allow them to function because they were not an option with your VIN. You also cant just take the donor BCM because it has the donor VIN in it which according to the GM dealers in my area at least can not be changed.
I read there are ways to get them to work by taking the wiring harness and module out of a previous generation GP and doing Some re-wing under the seats and cutting in a new switch somewhere but I don't know the details on that.
I really wanted the seat heaters working as close to the way they were supposed to as possible so I took on the challenge of modifying the HVAC control unit itself to bypass the BCM completely. It required running a new wire from the dash to each seat heater relay, some solder work, drilling out some PCB tracers, a few 300MΩ resistors and replacing the PCB momentary buttons with latching ones. Not worth it for the average Joe but I enjoy doing these kinds of things and I got the OEM heated seats I wanted.
I read there are ways to get them to work by taking the wiring harness and module out of a previous generation GP and doing Some re-wing under the seats and cutting in a new switch somewhere but I don't know the details on that.
I really wanted the seat heaters working as close to the way they were supposed to as possible so I took on the challenge of modifying the HVAC control unit itself to bypass the BCM completely. It required running a new wire from the dash to each seat heater relay, some solder work, drilling out some PCB tracers, a few 300MΩ resistors and replacing the PCB momentary buttons with latching ones. Not worth it for the average Joe but I enjoy doing these kinds of things and I got the OEM heated seats I wanted.