2001 Yukon XL 2500 LB7 Swap

KEVINL

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Jul 3, 2008
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Phoenix, AZ

KEVINL

Active member
Jul 3, 2008
1,369
0
36
38
Phoenix, AZ
Started tear down for headgaskets/ headstuds as now is the time to do it and have plans for twin turbos in the future
 

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KEVINL

Active member
Jul 3, 2008
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Phoenix, AZ
A few question i have so far that would be helpful to know

are all 01-06 2500hd radiator core support the same ? Or does it matter year & gas or diesel
The donors is very tweaked

the shift cable will the one from the 4l80e work or do i need the duramax lower or whole thing?

i have heard the wiring for the drive by wire pedal is separate but i only see the large loom that comes through the driver firewall next to the pedal

is it ran in there?
Can it be easily seperated?
 

Nate’s Dmax

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Dec 11, 2020
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As for the core support i believe they are different for the different motor models. Not sure between LB7 to LLY. I’m pretty sure the LBZ is different. The shift cable i would use the whole thing from the duramax if your keeping the Allison. For the pedal that is a separate harness that plugs into the dash harness under dash cover behind the Speedo instrument panel.
 

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