i need a wiring schematic for my 2001 gmc sierra. i purchased this vehicle with the engine wiring harness connector cut at the fuse block. i bought the connector and pins to repair the harness but i cant seem to find anyone willing to give me a detailed engine wiring harness schematic.

any help is much appreciated.

last 8 of the vin is 1Z179139

thanks.

 

probably going to have to sneak in to discount auto and crack open the back of a Haynes manual. or a chilton at barnes&noble if you can find it.

 

neither of those mauals have what i need. thanks though. i need a wiring schematic that shows connector pins and there terminal numbers.

 

may have to find a shop manual then. the wires were cut at the fuseblock though, so the pins and everything should still be in your fuseblock, pull them out one at a time and match the colors of the wire still left in them.

 

I WISH! the fuse block was cut out and sold. i replaced every harness in the truck except the engine wiring harness. cant seem to find one that a wrecker/salvage yard doesnt cut up to remove the engine/trans. the engine harness has 32 pins in the fuse block connector and at least 10-15 of those 32 wires are the same red color.

 

call starkey road used auto parts. see if they have a fuseblock for what your needing, may have it cheap and you could use that as your diagram

 

i would still need a diagram as there are many wires that are the same color.

 

usually same color wires are for the same things.

blacks are grounds, reds ar 12V, orange is 12V with atleast 10amp fuse, pink is 12v switched hot in start/run

i could be wrong, but i havent found any newer gm i've touched that has been different then those wires there

 

lol! i wish it was that easy......

 

I can find you a diagram if you are still looking.. I have wealth of online schematics at my disposal.