lb7 swap for lly

[902]

i have a 2003 gmc 2500 and would like to put a 2004.5 lly in. i am woundering if i have to change the emc and will the wiring just plug in. i have the complete lly with the wiring harness . thanks

 

[Smokin LB7]

You need the LLY ECM for sure

 

[Cougar281]

Best bet (IMO) would be to swap in the entire lly setup (heads, ecm, ficm, harness).

 

[902]

will the lly ecm plug into my trucks wiring or will i have to change plugins

 

[TheBac]

Read this thread:

http://www.duramaxdiesels.com/forum/showthread.php?t=16887&highlight=impossible