2008 gmc savana 2500 tcm pin diagram - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1958paul · 02-03-2022, 03:59 PM

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

**AussieinNC** · 02-03-2022, 05:40 PM

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

1958paul · 02-03-2022, 06:01 PM

thanks

1958paul · 02-04-2022, 08:45 AM

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

87chevy.com · 02-04-2022, 01:36 PM

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

1958paul · 02-04-2022, 05:47 PM

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

02-03-2022, 03:59 PM	#1
1958paul Registered User Join Date: Oct 2020 Location: Mechanicsville va Posts: 16	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

02-03-2022, 05:40 PM	#2
AussieinNC Moderator Join Date: Jun 2017 Location: Cherryville, NC Posts: 2,204	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 __________________ Family and country before all others... 2006 Chevy Silverado (Daily Driver) 2012 Chevy Equinox

02-03-2022, 06:01 PM	#3
1958paul Registered User Join Date: Oct 2020 Location: Mechanicsville va Posts: 16	Re: 2008 gmc savana 2500 tcm pin diagram thanks

02-04-2022, 08:45 AM	#4
1958paul Registered User Join Date: Oct 2020 Location: Mechanicsville va Posts: 16	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

02-04-2022, 01:36 PM	#5
87chevy.com BMW & ASE Master Certified Join Date: Feb 2004 Location: Houston, Texas Posts: 1,266	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 __________________ 1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress Last edited by 87chevy.com; 02-04-2022 at 01:44 PM.

02-04-2022, 05:47 PM	#6
1958paul Registered User Join Date: Oct 2020 Location: Mechanicsville va Posts: 16	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



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