86montecarloss

iTrader: (1)

Ok im doing a ls1 swap in my 89 gmc 1500 sierra
we have the motor and everything in there and we are starting to work on the wiring part of the motor
i have a harness out of a 2002 tahoe and i can not find a wiring diagram on the internet or anything about the harness
i need to know what all the wires are so that i can splice them in and get everything working
any help at all would be appreciated greatly
i really need a wiring diagram of the harness that goes under the hood to the fuse box it is a black connection
please help im pretty much stuck at this point and can not do anymore with out the diagram
thanks
Cody

86montecarloss

iTrader: (1)

any help at all where i could get one or anything would be helpfull at this point

duh

iTrader: (16)

check for a chiltons/ haynes manual for the truck the harness came out of. That should give you a decent wiring diagram of what goes where....

86montecarloss

iTrader: (1)

ok il have to check into it thanks
any one else have any ideas please chime in thanks
cody

1 FMF

iTrader: (1)

you might try checking on ebay for service manuals for the vehicles,
you may get lucky and get a service manual cheap that has the wiring. I got service manuals for my nissan altima for like $2 paypal for shipping of a cd with all the pdf's on it, and that had the wiring schematics in it. and like the next week guy at work who has a couple year's newer altima found all the pdf's online for free, so if you're web savvy you might get lucky.
I also have the GM 3 volume service manual for my 2002, which i paid $110 for shipped, and from that I could build the car from scratch if i had to, so i would say opt for the GM manuals before any others if you can afford it. Look for GM service manuals, for the year/model you need.

86montecarloss

iTrader: (1)

dam that was a expensive *** manuel
by chance is there any way you can copy and send the schmatics from your manuel to see if that helps me at all??

NonGoggleGuy

Not sure if this will help... but here's some misc. info on Vortec engines.

Didn't work.. hang on.

NonGoggleGuy

Try this.

86montecarloss

iTrader: (1)

that exactley what i need but i need it for a ls1
thats the older vortec motor
do you know if they have that same thing for a ls1?

NonGoggleGuy

Oh, sorry. Must've misread your post. I thought you wanted the truck wiring. Don't have one of those handy. I'll check when I get home.

86montecarloss

iTrader: (1)

the actual harness is out of a 02 tahoe that's the wiring diagram that i need
any help at all would be appreciated
thanks
cody

NonGoggleGuy

Now I'm confused. You said above you needed the LS1, now you're saying the Tahoe. Do you need the LS1 or the '02 Tahoe wiring diagram? And what motor in the Tahoe?

86montecarloss

iTrader: (1)

the motor and harness are both out of a 02 tahoe which im puting in the 89 i need the wiring schmatic on the motor harness out of the 02 tahoe
the motor is a 5.3

NonGoggleGuy

So it's an LM7 Vortec... the wiring PDF I gave you should be somewhat valid. Otherwise, I don't really have much in the way of wiring. A Haynes manual could help. Try some serious Googling.

faithlynn8715

any way u could send the pdf to me

1964SS

iTrader: (1)

Everything you need to know about the engine harness is located here. https://lt1swap.com/wiringharness.htm