cnukpup

hi everyone i have a 01 yukon that i need to swap a motor (bad rod) i have a 5.3L 4x4 4l60e i found an 05 5.3L (lm7) motor that i want to get but not sure if it will work in my truck? and dont know what LM7 is? can anyone help please Thank you so much. Tom

Bigredmariner

iTrader: (6)

The LM7 is a gen 3 Iron block with aluminum heads. It should work just fine for you. Look in your glovebox at the option sticker. Chances are you had a LM7 in your ride already. Good luck.

cnukpup

great thank you! one more question will it be in plain sight on the sticker?

nickleahy23

iTrader: (1)

why not find a 6.0 and swap it in? its basically the same swap..might as well up the power while you are at it

cnukpup

to do a 6.0l swap what would be needed? i did think about that. just not sure what it would take

bluebommer07

iTrader: (5)

if mem. serves its a direct swap, not sure but somone will chime in

cnukpup

i thought i heard you need to change the computer? not sure. any thought would be great know before i buy the 5.3l

fredkj3

iTrader: (1)

direct swap.. it will run on your stock tune.. i ran around for 6 months with stock tune when i did my 6.0 swap...

nickleahy23

iTrader: (1)

ya direct swap as long as it is 2001-2007 i believe? 99-00 has a longer crank and wont work...have to change the flex plate on the 6.0 to the one on your 5.3, but thats about it..you might as well get a blackbear tune to go along with the new motor, so that would take care of your computer

fredkj3

iTrader: (1)

you dont want that motor anyways. those are the iron head motors.