I'm interested in the new 4.5L Dmax everyone is talking about coming out strictly for the MPG's it's supposedly going to get, but I really want to stick with a 2500HD if possible for my next truck. My last truck was a 1500 Extended Cab Z71, and a 1500 just isn't stout enough.

Does anyone think that with the increasing price of diesel, that GM is going to make any modifications to the 6.6 Duramax to try to get some more MPG's out of it in the upcoming years? I sure hope so. Or is the 6.6 maxed out on MPG's with all the emissions crap it has to have on it to meet the tree hugging federal requirements?

Tuff to say but I wonder with the plants shutting down if the 4.5L will ever become reality now.

The 2010 Duramax will be different from current 6.6L due to the current engine not meeting 2010 emissions. I think the 6.6L is maxed out in it's current config, todays power doesn't equate to mpg's. If I were GM, this 4.5L would find it's way into the 2500HD lineup. Along side the 6.0L gas, since it will use basically the same GM 6speed auto. That would help those who want beefier parts, more towing capability than half tons, but want mpgs since they may not tow everyday, and don't come close to the limits of the 2500HD with the 6.6L. But this 4.5L was specifically designed to fit into any GM V8 engine bay. This engine will come to the market, just not into trucks and SUV's only. It's rumored this engine could actually save the HUMMER brand, as HUMMER is not having the issues of not selling in Aussie, like here. The next gen Colorado/Canyon will probably see some variation of this engine. Due to this engine being unbelieveably quiet for a diesel, it will be found eventually in most of GM's Cars. May not be 4.5L in size, but a smaller engine, with same block, just bored differently, sort of like the 4.8, 5.3, 6.0, 6.2, 7.0. This engine will help GM meet the 2020 CAFE marks. Diesel is the future along with Hybrid and electric. This engine will allow a Suburban to go from 13-15mpg combined to 20-22mpg (rumor), that's more than a 30% increase, match that with the 2mode system, it could be well into the mid to upper 20's combined. I don't ever see a gas engine getting those kinds of #'s in a Suburban. Just my opinions, but I think there pretty close to reality:D. Chris

hoping the new 4.5L duramax will be the base engine for the 2010 sierra/silverado 2500HD's

Check my garage pics. I have the answer!

I lokked in your garage, but, could not find the answer can you explain this a little better?

The game has changed drastically with the further losses at GM combined with the flip-flop of diesel prices. I suspect they will cautiously introduce the 1/2 ton and see how it goes before adding any vehicles with that engine. It cost them big money to add that engine to every vehicle so it isn't just a no-brainer decision.

Check my garage pics. I have the answer!


Checked your garage and love the addition. Can you please let everyone know how it works and what mpg gains you get because of your nice add on equipment. Would love to hear all the details, How much, how it works, who makes it etc.

I agree with D/A chris on the point of diesel being one of the future fuels. We still need an engine with raw power to do hauling. I'm not an expert but I believe the bio's burn cleaner. If that is correct I would like to see the gov't direct their efforts away from ethanol and gasoline, and implement a program to produce bio on a large scale, along with phasing in diesel to smaller vehicles. Bio may already be clean enough to meet the 2010 emissions in the engines we have now. My friends VW TDI get 44 mpg on the highway, thats better than most gas hybrids, imagine a diesel hybrid, they could probably push 60mpg. They subsidize corn for ethanol and the net energy is very low, soy diesel is a real option to help the economy and farmer, yet I have not really heard much talk from the gov't on this. People need to be educated about diesels, they are not the black smoke billowing vehicles of 25 yrs. ago.

Moved to the 4.5 Section!

I agree with D/A chris on the point of diesel being one of the future fuels. We still need an engine with raw power to do hauling. I'm not an expert but I believe the bio's burn cleaner. If that is correct I would like to see the gov't direct their efforts away from ethanol and gasoline, and implement a program to produce bio on a large scale, along with phasing in diesel to smaller vehicles. Bio may already be clean enough to meet the 2010 emissions in the engines we have now. My friends VW TDI get 44 mpg on the highway, thats better than most gas hybrids, imagine a diesel hybrid, they could probably push 60mpg. They subsidize corn for ethanol and the net energy is very low, soy diesel is a real option to help the economy and farmer, yet I have not really heard much talk from the gov't on this. People need to be educated about diesels, they are not the black smoke billowing vehicles of 25 yrs. ago.

Completely 100% agree with this statement. Very smart! Biofuels will be very popular and diesels will become more common place with regular cars. Kudos to Rudolf Diesel and his forward thinking. Designing an engine to run on peanut oil. Amazing!

don't think you'll see 4.5 in 2500 or 3500, trend for emissions engine is larger-low speed flat torque curve engines, helps fight emissions chokehold. have seen 2 articles, 1st; nose extendion, could be more cooling or expanded engine bore spacing to increase displacement(6.9 or 7.5 ltr?), 2nd was work on 8 or 10 speed transmision. DANA came out with 2.6x:1 axle gear ration to help keep newer OTR engine rpm lower. 4.5 will be replacement for 6.5 market, have seen that 60degree V6 DOHC to be marketed here(think it is all aluminum)

The most recent article I've read says a 6.9 with 400+hp adn 750lb will be out in 2010. I don't know if it is a complete redesign or just bored/stroked 6.6 . We need more bio fuels and also 7-8 speed transmissions to get the mpg's up. It's taken a long time to get to a 6 speed so we'll see.

As far as bio-fuels go, the most exciting things I've heard about are algal bio-diesel and even better, There's a company that has bio-engineered a harmless strain of E. Coli that secretes diesel. No long complicated refinement process like w/ soy bio-diesel or other kinds of feed-stock or cellulose type bio-fuels. The one issue I see w/ bio-diesel is that the OEMs don't certify, qualify, warranty, or guarantee their diesels to use 100% bio-diesel. Once that happens and these emerging bio-diesel companies scale up their production, I think diesel will become much more popular. Also, these bio-fuels are actually much cleaner, so with implementation, over time we could see the OEMs remove
all the restrictive emissions equipment new diesel vehicles come w/ now. Could you imagine a new LMM Duramax with current OEM tuning and original duramax emeissions equipment. The power would be ridiculious and I bet the mileage would be unbelievable.

In Europe 40% of the cars are diesel. The auto manufactures do not charge a $5000 premium for their engines. Instead of more drilling we first need more refineries so diesel doen't have to take a back seat to gasoline in production. Funny that diesel has been higher in the US for a few years, we import the largest amount of oil from Canada yet Canada's unleaded vs diesel price is almost equal, also true in Europe. Everytime diesels make a step forward something happens to screw us over.

The refineries are geared up to produce more gas than diesel. It's a design decision and not easy or cheap to change. More diesel is being used and less gas is being used, so something will have to give in the next couple years to get supply back into line with demand. Then again, with #2 heating oil tracking fuel prices, folks will be more motivated to switch to natural gas, propane, wood or even coal! That should free up more in the diesel supply.

jb

The most recent article I've read says a 6.9 with 400+hp adn 750lb will be out in 2010. I don't know if it is a complete redesign or just bored/stroked 6.6 . We need more bio fuels and also 7-8 speed transmissions to get the mpg's up. It's taken a long time to get to a 6 speed so we'll see.

Which is pretty silly considering all you have to do is add another planet set.

the Duramax 6600 will under go yet another update, the new Duramax will meet 2010 emission standards and get a power increase. about 420 hp and 750 ft-lb is expected for the new motor. add to that the Allison 1000 series transmission will get either 8 gears, or a gear splitter to make it 12 fixed gears to improve on fuel ecomony. the Duramax has not reached its maximum power yet or nor will it effect the durability of the motor.
The Duramax 4500 will be the top motor in the GM half ton truck line up. there are no plans to offer the Duramax 4500 in the Heavy Duty 2500 or 3500 trucks. but it will be offered in Vehicles like the Chevy Suburban, Chevy Avalanche, GMC Yukon XL, Hummer H2 and H3, and Maybe some Cadillac vehicles.

the Duramax 6600 will under go yet another update, the new Duramax will meet 2010 emission standards and get a power increase. about 420 hp and 750 ft-lb is expected for the new motor. add to that the Allison 1000 series transmission will get either 8 gears, or a gear splitter to make it 12 fixed gears to improve on fuel ecomony. the Duramax has not reached its maximum power yet or nor will it effect the durability of the motor.
The Duramax 4500 will be the top motor in the GM half ton truck line up. there are no plans to offer the Duramax 4500 in the Heavy Duty 2500 or 3500 trucks. but it will be offered in Vehicles like the Chevy Suburban, Chevy Avalanche, GMC Yukon XL, Hummer H2 and H3, and Maybe some Cadillac vehicles.

What else do you know?

Anything about a new frame for 2010? 6.2L replacing the 6.0L in HD's?

GM's ceo continues to report there are no plans for bankruptcy yet they try anything possible to survive. Hummer is on the trade block, any plans associated with that are obsolete. GM needs cash and development costs compete with that. Auto parts companies like Allison are in the same boat. Aside from smaller more fuel efficient vehicles, I wouldn't expect product changes. Nothing is set in stone except change related to GM's survival.

they are still gonna make the 6.6's right?

they are still gonna make the 6.6's right?


Yes they will continue to make the 6.6 along side of the 4.5L. The 6.6 may be revised but yes it will be still offered in one form or another.

Thank you, kind sir :]

Thank you, kind sir :]


No problem:)

Time will tell what GM has planned. No word on the 4.5L.

http://biz.yahoo.com/rb/081029/business_us_gm_report.html


Wednesday October 29, 9:20 am ET

DETROIT (Reuters) - General Motors Corp (NYSE:GM (http://finance.yahoo.com/q?s=gm) - News (http://finance.yahoo.com/q/h?s=gm)) is delaying planned spending on product development for 2009 and 2010 in a bid to save cash, Automotive News reported on Wednesday.

The reduced spending, along with cuts to design, engineering and research budgets, could delay the launch of vehicles such as the Chevrolet Cruze, a fuel-efficient, small sedan that GM has touted as crucial to its turnaround effort, the newspaper said.

Automotive News quoted an unnamed person familiar with GM's plans as saying the cutbacks were aimed at saving as much as $1.5 billion. GM spokesman Tom Wilkinson said the automaker was reviewing its spending because of an industry-wide slump in sales, but declined to discuss whether specific vehicle programs such as the Cruze could be delayed as a result.

Has anybody heard anything on urea injection? I read that there will be a dpf and urea injection. This article wasn't about the Duramax. I can't remember what manufacturer it was. One thing is for sure and that is all this emmisions BS is only going to get worse.