LT1 and LS1

[Domeskilla]

Does anyone know of pictures of the LT1 PCM pin out and the LS1 PCM pin out?

Thanks

[farmtruc]

I have the pin out for the ls1 and truck, don't have the lt1, i think gmcwantsls1 has a disk with stuff on it, maybe he'll chime in.

i can fax them to you.


later chief,


allen

[Domeskilla]

Thanks man.. You have the number. I can't wait till tomorrow to get it... :thumbs:

[Sleeper]

These were posted over on Fullsize Chevy a few weeks ago...i thought i might need em, guess not...good thing i kept them
Brandon
LT-1 computer wiring harness. Pin to plug
ok these are all done by harness color and pin #
Blue Connector
1 Tan w/white= ECM ground !!! very important
2 Lt Blue w/white = tranny connector
3 pink = need to double check
6 Dk Brown = tranny conn
9 Brown w/white = Check engine light = EGR need to double check
10 Dk Green w/white = Canister purge
11 Tan w/Brown = tranny connector
20 White w/black = Underdash connector # 6
22 Dk Blue = knock sensor
28 Yellow w/white = tranny connector
30 Tan= Underdash connector #9

Black Connecter
2 Red w/black = Dist diag (grey)
3 Pink w/black = Dist diag (grey)
5 White = Ign Module
6 Black = Tranny connector = TDS = ECT
7 Lt green = tranny connector
8 Green w/white= VSS output
12 Yellow w/black = Tranny connector
13 White = Tranny connector
14 Red = Dist diag (grey)
15 Orange = Underdash connector # 16
16 Black = MAP = IAT
19 Yellow = MAF
20 Lt Blue w/black = Dist diag
28 Grey = TPS
29 Grey = MAP
30 Pink = MAF
31Orange Underdash connector #16

Red Connector
2 ECM Ground IMPORTANT!
3 Black = inj # 1
4 Lt Blue w/black = inj #4
5 Yellow w/black = Inj #6
6 Red w/black = inj #7
7 Green w/white = Fuel pump turn on
9 Grey = EGR
10 Blue = coolant fan relay turn on #2
11 Dk Green = coolant fan relay turn on #1
14 Brown = Air pump turn on relay
18 Tan/white = ECM GROUND IMPORTANT
19 Lt Green w/black = Inj #2
20 Black w/white = Inj #5
21 Pink w/black = Inj #3
22 Blue w/white = Inj #8
25 Lt Green = to vats
31 Purple = VSS
32 Yellow = VSS

Clear Connector
1 Lt Blue w/white = IAC
2 Lt Blue w/white = IAC
5 Lt Green w/black = IAC
6 Lt Green w/white = IAC
7 Tan = pass side O2
8 Purple = Pass side O2
14 Lt Blue w/black = brake switch
15 Orange w/black = gear shift indicator
16 Red w/black = Tranny connector
19 Tan w/white = Drivers side O2
20 Purple w/white - drivers side O2
21 Tan = IAT
22 Blue = TPS
23 Lt Green = MAP
25 Yellow = ECT
28 Pink w/black = Tranny connector
29 Blue = Tranny connector
30 Red = Tranny connector
32 Black = Tranny connector

All these were done with an ohm meter and the Painless harness. If you have a stock harness and dont know whats what this may help you.

[Domeskilla]

Thank you Brandon. This is 1 step closer to the ls1 and lt1 pcm conversions for the s-10's.. I just hope this shit works!