Original sentence: GM will reportedly offer an identical 2-mode hybrid system in its full-size 2009 model 1/2-ton pickup trucks (aka GMT900) in Q:4 2008
Edited sentence: GM now offers an identical 2-mode hybrid system in its full-size 2009 model 1/2-ton pickup trucks (aka GMT900) the Chevy Silverado and GMC Sierra, each of which are available in a two and four wheel drive model