LS1 in to a 93 4x4 4low?

[s10mods]

Ok, I have helped my buddy with the LS1 swap in to his 93 4x4 yukon. My question, how do you guys wire up te 4x4? I know it's a seprate system, but what about when it's in 4 low? the trans dosent shift. can the pcm be programmed for that option? it has a 12200411 pcm number. Thanks in advance for any help.

[s10mods]

Anybody ever ran in to this? I havent tried it in 4 low yet, but I dont think it's going to shift.

[airdeano]

there is a red connector pin 16 GRY/BLK 4WD Low Signal that needs
to notify the PCM 4wd signal is in use. its primarily a ground circuit
to R16 for notification. this should remedy the issue, but depending
on transfer case ratio still can be hampered.

airdeano