Bigger Bores: GM's Smallish Trucks Get a Power Boost for 2007

GM's smaller light trucks are getting more gumption for 2007 — much needed, some say — with two new engines set to power the Chevrolet Colorado, GMC Canyon (pictured) and Hummer H3. Extra horses will come from an increase in displacement of the trucks' powerplants — from 2.8 liters to 2.9 in the pickups' standard four-banger, and 3.5 liters to 3.7 in the inline five that powers the 4x4 pickups and smallest of Hummers. In particular, the 3.7-liter engine gets a 22-horsepower increase, to 242 hp, which may serve to silence those who've decried the H3's lack of go. Good news. Now, wither the US turbodiesel?

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Hummer H3x to Debut in Detroit [internal]