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by Black6spdZ
Mon Sep 09, 2019 7:55 pm
Forum: GM Performance Forum
Topic: 98 GMC Twin Turbo with 12200411 PCM--- It's Alive
Replies: 1112
Views: 1998475

I'm really confused with the need to splice into the trans harness on a 2000 4.3 to 0411 swap. the 2000 S10 schematic clearly shows PRNDL A, B, C and P on pins "C3 Grey/White" 31, 32, 28 and 26. Do the black box pcm pins not actually go to the trans?