G-Body

iTrader: (4)

CalEditor: Did you ever get a chance to figure out if it was possible to partially segment swap the A/C segment in order to change to a +12V request on the 04 PCM`s?

69 Ghost

In relation to this the 04GTO has the low fan turn on through the BCM. It may look like a 04 Express Van OS is the way to go. Hopefully it can be setup to work for the fans also. The rest should be a table conversion from a GTO to the van OS.

kleyba

I'm using the 2004 Silverado for my swap, same issue low pressure switch and AC request signal go through the BCM. Has anyone found a way to modify this and reprogram the PCM? This is the thread I found with the most info.

arthropraxis

So, did anyone ever figure out how to get the A/C request signal turned on the 04 GTO PCM?

camarotucker

If I understand, A/C request (12+) goes to Blue pin 58 serial data. This is the same pin used for OBDII port. Where would OBDII port data be ran to? Blue 59?

Note: 2004 Cadillac CTS-V