I'd be interested in the new 4.5 Duramax 1/2 ton, but does anybody know if GM does put it in the truck, will they put a regular length short bed on the Crew Cab models? I hate the extra short bed on the 1500 crew cabs. Ford offer's a regular length short bed on their F150 Crew Cab models. Chevy / GMC need to do the same. Anybody heard anything on this?

Also, what are the price figures on the 4.5? The 6.6 Duramax is about a 7K add on the 2500 model, what's the sticker shock going to be on a 1500 with a 4.5 Duramax?

Last question - There's a thread I saw that said the 4.5 isn't actually a Duramax, it's GM's own diesel. Is this true, or is it going to be a Duramax motor?

The only one of those that I can answer (or anyone else who doesn't work for GM, as far as I know) is the third one. It's going to be called a Duramax, but unlike the previous ones it's all being developed in-house, and not with Isuzu.

GM has a lot at stake here, so I am sure they did their homework on it. No doubt it will be fine.

I'd be interested in the new 4.5 Duramax 1/2 ton, but does anybody know if GM does put it in the truck, will they put a regular length short bed on the Crew Cab models? I hate the extra short bed on the 1500 crew cabs. Ford offer's a regular length short bed on their F150 Crew Cab models. Chevy / GMC need to do the same. Anybody heard anything on this?

Also, what are the price figures on the 4.5? The 6.6 Duramax is about a 7K add on the 2500 model, what's the sticker shock going to be on a 1500 with a 4.5 Duramax?

Last question - There's a thread I saw that said the 4.5 isn't actually a Duramax, it's GM's own diesel. Is this true, or is it going to be a Duramax motor?


heres what i know GM is comming out with a duramax 4.5 turbo engine for a mid size truck there saying now like the chev colorado will be a duramax option in the next 2 years.... thats is what i have heard from the grape vine. lol i think this will do Gm good because alot of people are looking for a diesel truck but dont want a 3/4 ton... but i just hope diesel prices drop soon ....

I think a lot is being read into and a lot of assumption being read into the trucks that will have the 4.5L engine.

If you notice they used the words Silverado and Sierra. Those brand names cover everything from the 1500 to the 3500HD. I think a 1500 with the 4.5L would be great but so would a 2500. It could be the base engine in a 2500HD with options for the 6.6 liter.

I would think that it will be in anything that is included the the CAFE standards vehicles. The 2500 and up HD models are not included in the CAFE standards vehicles based on the info below.

From Wikepedia-

Light trucks that exceed 8,500 lb GVWR do not have to comply with CAFE standards; SUVs (http://en.wikipedia.org/wiki/SUV) and passenger vans are exempt up to 10,000 lb. In 1999, over half a million vehicles exceeded the GVWR and the CAFE standard did not apply to them.[3] (http://en.wikipedia.org/wiki/Corporate_Average_Fuel_Economy#cite_note-cafe-overview-2) In 2011, the standard will change to include many Light trucks that exceed 8,500 lb GVWR do not have to comply with CAFE standards; SUVs (http://en.wikipedia.org/wiki/SUV) and passenger vans are exempt up to 10,000 lb. In 1999, over half a million vehicles exceeded the GVWR and the CAFE standard did not apply to them.[3] (http://en.wikipedia.org/wiki/Corporate_Average_Fuel_Economy#cite_note-cafe-overview-2) In 2011, the standard will change to include many larger vehicles. [4] (http://en.wikipedia.org/wiki/Corporate_Average_Fuel_Economy#cite_note-3) The United States has the lowest average fuel economy among first world (http://en.wikipedia.org/wiki/First_world) nations; the European Union (http://en.wikipedia.org/wiki/European_Union) and Japan (http://en.wikipedia.org/wiki/Japan) have fuel economy standards about twice as high as the United States.[5] (http://en.wikipedia.org/wiki/Corporate_Average_Fuel_Economy#cite_note-4)larger vehicles. [4] (http://en.wikipedia.org/wiki/Corporate_Average_Fuel_Economy#cite_note-3) The United States has the lowest average fuel economy among first world (http://en.wikipedia.org/wiki/First_world) nations; the European Union (http://en.wikipedia.org/wiki/European_Union) and Japan (http://en.wikipedia.org/wiki/Japan) have fuel economy standards about twice as high as the United States.[5] (http://en.wikipedia.org/wiki/Corporate_Average_Fuel_Economy#cite_note-4)