A/C help. 2006 5.3 with efi live in a 93 rcsb

[creekrat]

Have a few questions about my swap in to a 93 gmc rcsb. Who here has gone with dbw and had functioning a/c? My engine/trans/harness/ecm is from a 2006 avalanche. I know that that vehicle uses serial data for a/c request. I have efans and have a way to control them independently of the ecm so i am trying to figure out an OS with efi live that i could have the a/c commanded by the ground as in the older vehicles and vans but also keep dbw. Would a segment swap be the key? I can also use a relay and the a/c command to bypass the temp switch for the efans so that they come on when the a/c is commanded. I will be using a swap bracket with a r4 compressor

[Skylark]

The a/c in the 93 is a stand alone system. There is no reason to change anything. The ecm will see the additional engine loading and adjust all on its own.

[kewljay223]

+1

i have DBW and function a/c with the r4. just run some relays to control fans when compressor is kicked on and your good to go. when compressor turns on, idle will drop for a second but as stated, ecm will sense it and bring it right back up.