Search found 2 matches

by Bob442
Wed Feb 24, 2016 6:10 pm
Forum: GM Performance Forum
Topic: 98 GMC Twin Turbo with 12200411 PCM--- It's Alive
Replies: 1120
Views: 1800544

If anyone here has done this swap and has an efi live file, with everything sorted with calibrations please contact me, I built a 383 stroker with a mild cam, I'm at the stage were Ive had the motor running on the old computer, swapped everything over to 0411, I got a base tune file but something is...
by Bob442
Sun Dec 06, 2015 8:48 am
Forum: GM Performance Forum
Topic: 12200411 L31 4L60E real 4X4 .tun file. 4LO WORKS!!!!!!!!!
Replies: 63
Views: 119250

So I'm looking for the wiring diagram, and is it up to date with all the small things listed with the speedo, egr, and air conditioning issues? I'm putting a 383 into my 1998 Silverado and this is my last step. Thanks.