2008 gmc savana 2500 tcm pin diagram
 

not sure if this is the right forum or not but have a question. while reworking my harness i found a dark blue wire coming from pin 47 on the connector for the tcm that has been cut and goes nowhere i also have a dark blue wire from pin8 on the same connector that goes to the round plug that goes to the trans. the only pin diagram i found for the tcm connector states that neither of them pins are used. the diagram i found was on a gto forum so not sure if the gmc tcms where wired differently. where should the cut wire go or is it not needed? when i got the van the trans. was already removed. thanks

Re: 2008 gmc savana 2500 tcm pin diagram
 

This link will take you to a Electrical Master publication for 2008 and up trucks and vans.

The pdf file is too large a download to post here.

https://www.gmupfitter.com/wp-conten...hassisCabs.pdf

Hope this helps

Re: 2008 gmc savana 2500 tcm pin diagram
 

thanks

Re: 2008 gmc savana 2500 tcm pin diagram
 

aussie thanks for that info. but i couldnt find anything in that for a 2008 expess 2500 for a 4l80e. only thing i found was for a 4l60e. so i thought maybe its a 4l60 so i counted the wires going to the plug and there are 11 wires going into round plug and everything i have found online states thats all that go to a 4l80 and 13 go to the 4l60

Re: 2008 gmc savana 2500 tcm pin diagram
 

alldata doesnt even show pin 8 or 47 for a 2008 gmc 2500 savanna.... I'd double check application and terminal pin location

theres a pin 11 thats DK BLU and it goes to accessory voltage - 12v accessory and run only
and then pin 44 thats DK BLU and it goes to transmission pin location " R "

clint

Re: 2008 gmc savana 2500 tcm pin diagram
 

i got it figured out. my dumb arse had the plug turned the wrong way lol. the one wire that was cut goes to accessory wake up. all the diagrams showed it as a yellow wire i think. this wire can be remove am i correct? thanks