So those of you that need help with wiring ive done the wiring on my 94 c1500. Figured id share what i know to help yall out.
Speedo wire is behind glove box, theirs a white box called the drac has 2plugs in it. The larger of the 2 plugs their is a light blue with black striped wire. wire your vss wire from your Ls harness to that wire. My speedo reads correctly. The Tcc wire is also behind glove box its in the black/blue connector, its a purple wire. Tac wire is the white wire in the engine bay that went to your distributor. Coolant temp is a single green wire that went to your orginal coolant temp, oil pressure is a tan wire. I used an adapter for oil pressure sensor and used the old tbi sensor in the ls block. For anything 12v constant i ran to the juntion box on passenger side firewall. Key 12v i used the big red wire that was with the tac wire. If you need more info let me know. This is the info i tried to get when i first started my swap, thought it would help speed some people along. If yall need pictures let me know ill take some.