http://www.gminsidenews.com/forums/s...969#post348969
4.8L iron block (RPO LY2), rated at 290 horsepower (216 kw)*
5.3L iron block (RPO LY5) with
Displacement On Demand technology, rated at 320 horsepower (238 kw)* (including E85-capable version – RPO LMG)
5.3L aluminum block (RPO LC9) with
Displacement On Demand technology and E85 capability, rated at 320 horsepower (238 kw)*
6.0L iron block (LY6) heavy-duty engine with
variable valve timing, rated at 350 horsepower (260 kw)*
6.0L aluminum block (L76) with
Displacement On Demand technology and
variable valve timing, rated at 355 horsepower (264 kw)*
6.2L aluminum block (L92) with
variable valve timing, capable of 380 and 400 horsepower (283 kw to 298 kw)*