One of the more common complaints about the GMT355-based trucks (Chevrolet Colorado, GMC Canyon, Hummer H3) is their lack of power. When the H3 debuted, there were rumblings of the 5.3L V8 being slid into its butched-to-the-max bodywork. Unfortunately, someone forgot to measure the transmission. It turns out the V8 with the 6-speed automatic will not fit, and that's the combo the General desires to offer in their smallest trucks. To accomplish that goal, the GMT-355 platform is reportedly going under the knife. No word whether it'll take a stage name when the surgery is over, or if the moniker will stay GMT355, but look for the revised platform under the reportedly forthcoming Hummer H4. Following soon after will be a new Colorado, which is said to look something like Colorado Crew Cab Z71 Plus SEMA concept pictured above. The overwhelmed 5-cylinder is also rumored to be taking a sidestep - giving the 6-cylinder Atlas a place to live. We can only hope the quality of the interior will come up as well. The current GMT-355 trucks aren't filled with materials comparable to the Tacoma, for instance, but the sticker wants to play in that realm. Rebates to the rescue, but our real hope is that the next Colorado is good enough to stand on its own

[Source: GM Inside News]