Just wante dto confirm this before I ordered my engine, only difference between a LQ4 in a yukon denali and a LQ4 in a silverado 2500 is in the programming (aside from the flexplat difference due to the different transmissions). One won't be a "tighter" engine than the other?

 

No difference based upon everything I've read.

 

LQ4's that went into different vehicle are all the same. However, from what I understand, 99-01 LQ4's had a longer crank snout than the 02 and up...

 

im pretty sure, but from what I was told 05& up denali's have a LQ9

 

Actually I think it was a wider rear flange that was bigger on the 99-01's.

 

Hmm...very well could be...

 

Programming on some. Cranks on others.

 

I guess its just some 01's.. mine had the short crank..

 

the 05-up LQ4s have LS2 connecting rods and LS2 timing set

 

Thanks guys, I'm looking at 05 and up just for the reason nightrunner (real name?) mentioned.

ap2002, i'm fairly sure they have the LQ4 due to this page (talking Yukon now, not sierra).

I appreciate all the responses,
Andrew