I have done the LT1 and T56 swap in my '89 GMC F/S pickup. So, if anyone has questions regarding this task, PM, email or post here and I try my best to help.
I have done the LT1 and T56 swap in my '89 GMC F/S pickup. So, if anyone has questions regarding this task, PM, email or post here and I try my best to help.
1989 GMC 1500 f/s stepside reg. cab--4.10's w/Eaton posi--Swapped in LT1--T56 w/SPEC clutch--LT4 Hotcam Kit--Lt4 km--Vented opti conv.--Meziere h2o pump--Taylor over-the-valve-cover wires--K&N CAI--Dynomax coated mid- length headers--True dual Flowmaster 40's no cats--Pcmforless programming
323rwhp/332rwt
13.5 @ 98 1.9 60' (with old 700r4 and ET Streets)
1998 Z28 A4--stock
Thanks man for offering a lending hand for ppl with questions.
91 s10 - bagged and bodydropped...getting rebuilt
91 nissan - backhalfed and bagged
Definitely--that's what this board is all about.
1989 GMC 1500 f/s stepside reg. cab--4.10's w/Eaton posi--Swapped in LT1--T56 w/SPEC clutch--LT4 Hotcam Kit--Lt4 km--Vented opti conv.--Meziere h2o pump--Taylor over-the-valve-cover wires--K&N CAI--Dynomax coated mid- length headers--True dual Flowmaster 40's no cats--Pcmforless programming
323rwhp/332rwt
13.5 @ 98 1.9 60' (with old 700r4 and ET Streets)
1998 Z28 A4--stock
just send him your "write up" you did or i can find it later.
also Domes, did i email you a LT1 PCM pinout for the tech page or was that somebody else?
Brandon
Hugger Orange 99 SS Hardtop #756
485rwhp/440rwtq SAE
You posted it here some time back. I'm not sure what happened to it. I wrote it down, but its in my pile of about 1000 papers.
91 s10 - bagged and bodydropped...getting rebuilt
91 nissan - backhalfed and bagged
Just on case....not sure about any credibility, but its something to go on :flipoff:
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 connector
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
Hugger Orange 99 SS Hardtop #756
485rwhp/440rwtq SAE
Thank you Brandon.
91 s10 - bagged and bodydropped...getting rebuilt
91 nissan - backhalfed and bagged
.........................blah blah blahOriginally posted by 1500Sleeper@May 20 2003, 05:08 PM
Just on case....not sure about any credibility, but its something to go on
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 connector
2 Red w/black = Dist diag (grey)
Those that need the pinout info should go here http://lt1s10.home.icq.com/wiring.html and make use of the last three spreadsheets on that page. those 3 are the only pinout info you really need as far as splicing into wires is concerned. the pinout info 1500sleeper listed all lead to connectors that plug into the lt1 directly or lead to connectors going to gauges, aldl, and power/ground connections, which is covered in the last 3 spreadsheets anyway, so no need to confuse your self with them. :wink:
1989 GMC 1500 f/s stepside reg. cab--4.10's w/Eaton posi--Swapped in LT1--T56 w/SPEC clutch--LT4 Hotcam Kit--Lt4 km--Vented opti conv.--Meziere h2o pump--Taylor over-the-valve-cover wires--K&N CAI--Dynomax coated mid- length headers--True dual Flowmaster 40's no cats--Pcmforless programming
323rwhp/332rwt
13.5 @ 98 1.9 60' (with old 700r4 and ET Streets)
1998 Z28 A4--stock
looks like the same thing after checkin a few of the, out....but 1 or 2 are missing on the one i copied and pasted above.
:flipoff:
Hugger Orange 99 SS Hardtop #756
485rwhp/440rwtq SAE
well it isnt if you look at the last 3 spreadsheets on the page--as i stated in my post before. the first two spreadsheets on that page contain the same info you posted, which is basically irrelevant. once again, only the last 3 spreadsheets on that page are really useful.Originally posted by 1500Sleeper@May 20 2003, 10:35 PM
looks like the same thing after checkin a few of the, out....but 1 or 2 are missing on the one i copied and pasted above.
:flipoff:
1989 GMC 1500 f/s stepside reg. cab--4.10's w/Eaton posi--Swapped in LT1--T56 w/SPEC clutch--LT4 Hotcam Kit--Lt4 km--Vented opti conv.--Meziere h2o pump--Taylor over-the-valve-cover wires--K&N CAI--Dynomax coated mid- length headers--True dual Flowmaster 40's no cats--Pcmforless programming
323rwhp/332rwt
13.5 @ 98 1.9 60' (with old 700r4 and ET Streets)
1998 Z28 A4--stock
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