2001 8.1L (L18) PCM Pinouts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

496 BB · 02-14-2015, 05:43 PM

Of course Gm Upfitters does not have the 01 and 02 manuals anymore and in 03 and up they were different harnesses. Ive tried Prodemand and MotoLogics for pinouts and they are different in areas on the C1 and C2. Id like to see AllData as Ive heard they are the best at labeling as well.

I need the C1 and C2 PCM pinouts. Does anywhere have these? Im not buying a harness. Im making this one stand alone. And of course you cant find nothing about these engines anywhere. Ive owned one since 2004 and love it so I know how hard it is. The struggle is real. Ideas?

02-14-2015, 05:43 PM	#1
496 BB Registered User Join Date: Oct 2010 Location: Ohio Posts: 136	2001 8.1L (L18) PCM Pinouts Of course Gm Upfitters does not have the 01 and 02 manuals anymore and in 03 and up they were different harnesses. Ive tried Prodemand and MotoLogics for pinouts and they are different in areas on the C1 and C2. Id like to see AllData as Ive heard they are the best at labeling as well. I need the C1 and C2 PCM pinouts. Does anywhere have these? Im not buying a harness. Im making this one stand alone. And of course you cant find nothing about these engines anywhere. Ive owned one since 2004 and love it so I know how hard it is. The struggle is real. Ideas? __________________ 1985 Chevy K-20 350ci (8.1L in the works!) NP203/TH400 (Soon to be 205/400) Dana 44 and 14 bolt FF 7.6' Western Plow 2001 Silverado LT HD 4x4 496ci (8.1L) Allison EFI Live And more.....

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