2003 tahoe 4x4 wire harness info please help

[winniedog]

im going to apologize upfront im sure this is on a tread somewhere but i spent time yesterday and i cant find what i need. i dont know how i got this old being so stupid i think its proof of god lol. mygirlfriend bought a salvage 2003 tahoe not realizing she got a wrecked flooded junkyard special she spent 1700 and never got it to quit stranding her. me being so brilliant told her i woukld take care of it and here my stupid ass is begging for help. broken wires ground isues were what had it sidelined but every time i fix it another wire breaks. we dont have money like that soi went to puck and pull found a 4x4 tahoe that had modt of the harness left and took it off. i pulled the old one laid them side by side and the one i pulled is missing sa 3 pin plug from the factory that connects right beside the fuse box. short of pulling it apart and chasing the wires i dont know what its for an imtellegent man either knows or could find it i a minute but not me nooo. one wire goes back to the computer the other goes downtream im almost thinking its related to the 4wd but i dunno. the rest of the harness lookds spot on short of one connetion being different. i havent added on parts of the harness that are misiung it iis possible theres a additional plug but i hate to dump more time in someting that cant be resolved. thanks to you guys who know enough to help the rest of us

 

[Tahoe14]

Maybe @Fless may know someone that is familiar with these year Tahoe.

 

[Fless]

So the three-pin connection is on your truck, but not on the 'picked' harness? Have a picture of where it goes on your truck? Maybe also a picture of the connector itself?

Might be helpful to know what year the donor truck is.

 

[rockola1971]

I have (2) 2003 LT's. Pics will help about what you are talking about. I can also read electrical schematics if needed.