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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]


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  • 26 Comments
      • 8 Years Ago
      Engines with more horsepower then ever before and still not enough for some. Then it has to have better economy as well.
      • 8 Years Ago
      Non-sense. The bored out inline5 3.7 and a 6 speed automatic 6L50 would be great.
      Add variable intake valve timing, 250hp 250ft-lbs, can be on the market yesterday.

      The fuel tank extends from the rear axle upto the transfer case. There isn't any room for a driver side exhaust to cross over to the passenger side muffler. Fixing that would entail substantial modification to the platform, and the ROI for that would be how many years?
      • 8 Years Ago
      Guys I think you may be missing the point. Its not about what people need, its about what they want, sure a 6 in the colorado is great, I agree, but the H3 targets a low level luxery audiance AND the off road set. Compared to the toyota's and nissans it is pretty slow. It still sells like hot cakes but imagine what it could be if it could match or beat the imports in all performance paramiters. Im not saying a 6 wouldent work, just given its current weight it needs the 5.3 (315-325hp) to accelerate the same or better then the others in its price AND set class.
      • 8 Years Ago
      And for the offroaders think of the added low level torque a 5.3l would pull over the 3.7! Crawling would never be so easy.
      • 8 Years Ago
      Not really sure the Colorado needs a V8. 240hp seems plenty in that size truck. It does need a redesign. It's specs on towing is way below the competition. I have a S10 so any Chevy truck has a negaitve maintenace cost stigma to overcome with me.
      The 10 year warantee if does not have escape clauses may make be feel better.
      • 8 Years Ago
      They better do something with that truck. It has been a joke since it came out. It is miles behind the Toyota, Honda, and Nissan. The styling is just sad. Even more disappointing is how the new Silverado took its styling ques from the Colorado.

      Anyway, save the V8 for the SS version or the comeback of the GMC Cyclone. The six is more then enough for a small truck. Hell, you don't see Dodge kick import ass with their V8 Dakota.
      • 8 Years Ago
      Here is why the Colorado has been a complete failure: UGLY front end styling, with the double headlights and eyebrows. This is straight out of National Lampoons Vacation. Rear styling is last generation Nissan Frontier. Interior is about as Fisher-Price and cheap as it gets. Engines have been too weak from the get-go. (No one asked for a 5 cylinder.) Whoever designed this vehicle should be fired.
      • 8 Years Ago
      I find myself in perplexed as to why a turbo 4 diesel is lacking in GM vehicles of this type. Power, torque, economy. Perfect. And to you Jason at post #10, I can't believe that you and I actually agree on something. Your accessment of the Colorado is right on. I will regret this no doubt.
      • 8 Years Ago
      GM seems to be able to make V8's affordably, and they also get great fuel economy. I imagine 24mpg or so highway in a small truck. Using the same engine as the high volume silverado/sierra wouldn't hurt costs either. I don't see why you wouldn't do it if possible. They need to do something to differentiate their compact pickup from the competition.

      1. V8 power available
      2. I4 or I6 as base engine
      3. Improve the interior
      4. styling improvements ala picture in article

      Result: Selling trucks w/o rebates. It's not all that difficult. You're not designing cutting edge sports cars here, just pickups.
      • 8 Years Ago
      Just for general info, on the gmi site a guy wrote that the factory where he works have already built some 08 pilot models three with v-8 engines. Also a tranny plant worker said the 6 speed auto is the same size or smaller than all gm 4 speeds except the 4-80 so the 6 speed would in fact fit with little or no mods
      • 8 Years Ago
      The platform is just a bit dated compared to the Taco and Frontier. With VVT the 3.7 would do fine- the 3.5 in the ridgeline has plenty of power. Combined with the 6spd...
      Or they could drop in an isuzu 3l diesel.
      • 8 Years Ago
      H3 with a 5.3l V8 sounds great.
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