Originally Posted by SoFlaZ
I think the L99 is a L98+1. The engine in the Escalade modified to fit in a lower hood is my guess. Also the L98 was the TPI engine in the C4 Corvette, with 250 hp. I highly doubt the same engine in that vette is in the Escalade. Sorry if I seem sarcastic, I do not mean to be.
Also I don't see why AFM can't be used with a manual? To me I its like saying you can't get cruise control on a manual. I don't see how its any different shutting off 4 cyl's with auto or manual if you are cruising at a constant speed. If they are supposed to turn back on instantaneously, it should not matter what transmission you have. If the auto gets significantly more MPG's, I'll have to change my mind from my die-hard manual ways, though I don't have anything against autos I just prefer shifting myself.
I may be complaining about nothing, but i'll wait for Monday for some real answers.
There is an entire thread on this in this forum on page 2.
Dragoneye summed it up well in that thread, it is primarily because there is no torque converter to absorb the vibration, etc, so if you program the computer on the manual to defeat that, you do not get the benefits. It will be solved eventually, but does not appear for the 2010 Camaro