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GM announces new 4.5L V8 Duramax diesel for half-ton trucks and HUMMER H2
www.sedans.autoblog.com ^ | 06/15/2007 | Staff

Posted on 07/12/2007 1:15:11 PM PDT by Red Badger

Mark your calendars, because we're calling today a watershed moment for the advancement of diesel's acceptance in the U.S. General Motors has just announced a new 4.5L V8 Duramax turbo-diesel powerplant it plans to use in the Chevy Silverado and GMC Sierra half-ton pickups, as well as the HUMMER H2. The new oil burner is expected to produce at least 310 horsepower and 520 ft-lbs. of torque. It features dual-overhead cams, four valves per cylinder, a variable-vane turbocharger and aluminum cylinder heads with integrated manifolding that helps keep the overall package small enough to fit in the same space as the automaker's small-block gas V8s.

That's right, just imagine the possibilities. Wherever GM uses a small-block V8 gas engine, it could potentially use the 4.5L V8 Duramax diesel. In a few years we could be driving diesel Impalas, diesel Camaros, maybe even a diesel Corvette! To quote GM's press release, the engine's small size gives it "the flexibility to introduce this engine in a wide variety of vehicle applications should there be future market demand." Indeed.

GM estimates that the engine will improve fuel efficiency by 25%, reduce CO2 emissions by 13% and decrease particulate and NOx emissions by at least 90% in its GMT900 pickups and the HUMMER H2. Whoever said the HUMMER H2 was on its way out will likely be proven incorrect after this engine debuts. Scheduled to be built at the GM Tonawanda engine plant outside Buffalo, NY, the 4.5L V8 Duramax diesel will be 50-state emissions compliant and meet 2010 diesel emissions standards, as well. GM claims its new diesel will also have NVH (Noise, Vibration and Harshness) levels approaching those of today's current gas V8s, though we'll have to wait and see if that wish comes true. That wait should end in a couple of years, as the automaker states the engine will be available in Silverado, Sierra and H2 models built after 2009.

UPDATE: Pickuptruck.com's Mike Levine has learned from GM that despite sharing its name with the older 6.6L Duramax diesel that was developed in partnership with Isuzu, the new 4.5L Duramax was developed completely in-house by GM.

Check out GM's full press release after the jump for more details.

[Source: GM]


TOPICS: Business/Economy; News/Current Events; Technical
KEYWORDS: automakers; automotive; diesel; energy; fuel; generalmotors; hummer; suv
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Rest In Peace, old friend, your work is finished.......

If you want on or off the DIESEL ”KnOcK” LIST just FReepmail me........

This is a fairly HIGH VOLUME ping list on some days......

Hat Tip to A.Patriot!................

Now you can thumb your nose at all those Pious, er Prius owners..........

1 posted on 07/12/2007 1:15:19 PM PDT by Red Badger
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To: sully777; Fierce Allegiance; vigl; Cagey; Abathar; A. Patriot; B Knotts; getsoutalive; ...

HUMMER KNOCK!.......


2 posted on 07/12/2007 1:16:18 PM PDT by Red Badger (No wonder Mexico is so filthy. Everybody who does cleaning jobs is HERE!.......)
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To: Red Badger
Sorry, I'm married...

Oh THAT Hummer, I guess my new bumper sticker "Built by Chevy, shaken by Duramax" might not go over if this comes out as smooth and quiet as they are advertising.

3 posted on 07/12/2007 1:20:17 PM PDT by Abathar (Proudly catching hell for posting without reading the article since 2004)
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To: Red Badger
.....bout time.....

.....wonder if they will offer the Allison transmition also?!?!.....

4 posted on 07/12/2007 1:20:30 PM PDT by cyberaxe (((.....does this mean I'm kewl now?.....)))
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To: Red Badger

520 ft lbs of torque. That makes me happy.


5 posted on 07/12/2007 1:20:42 PM PDT by JamesP81 (Keep your friends close; keep your enemies at optimal engagement range)
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To: JamesP81

Thatsalotta torque. Stump pulling at idle.


6 posted on 07/12/2007 1:22:21 PM PDT by Clam Digger
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To: JamesP81

Your right, for those of use who actually work and pull with their trucks I like that number a lot.


7 posted on 07/12/2007 1:23:02 PM PDT by Abathar (Proudly catching hell for posting without reading the article since 2004)
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To: Red Badger

25 percent fuel efficiency? Wow. Way to go GM


8 posted on 07/12/2007 1:23:15 PM PDT by Tribune7 (Live Earth: Pretend to Care)
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To: Clam Digger
Thatsalotta torque. Stump pulling at idle.

.....now if they would only add a pto option on the H2.....

.....i could retire the old tractor.....

9 posted on 07/12/2007 1:26:00 PM PDT by cyberaxe (((.....does this mean I'm kewl now?.....)))
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To: JamesP81

I want one in a Mustang!.........


10 posted on 07/12/2007 1:26:01 PM PDT by Red Badger (No wonder Mexico is so filthy. Everybody who does cleaning jobs is HERE!.......)
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To: Red Badger
It features dual-overhead cams, four valves per cylinder, a variable-vane turbocharger and aluminum cylinder heads...

Those aluminum heads bother me. For skillets and cylinder heads, I'm a firm believer in cast iron.

I suppose geezerhood is upon me...

11 posted on 07/12/2007 1:26:48 PM PDT by Texas Mulerider
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To: Abathar

I’d rather have a hummer than drive one.


12 posted on 07/12/2007 1:27:40 PM PDT by Sig Sauer P220
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To: Texas Mulerider

Note it said cylinder heads, not cylinders..........


13 posted on 07/12/2007 1:30:17 PM PDT by Red Badger (No wonder Mexico is so filthy. Everybody who does cleaning jobs is HERE!.......)
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To: Sig Sauer P220

I saw a picture of a vanity plate that said “IWANTA” that was located directly about the big HUMMER on the back of the thing. Guess he got that one slipped through without having it pulled by the DMV.


14 posted on 07/12/2007 1:31:47 PM PDT by Abathar (Proudly catching hell for posting without reading the article since 2004)
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To: cyberaxe

What the hell you want to run off of a hummer? Thats an awfully expensive PTO toy!


15 posted on 07/12/2007 1:32:47 PM PDT by Clam Digger
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To: Abathar
Sorry, I'm married...

Not sure I'd care to picture the sort of woman who could be described in terms of a "diesel hummer."

Ah, damn, too late.... In my mind's eye, I see somebody who's got scorch marks on her right cheek from where her rear end touched the Harley's exhaust pipe....

16 posted on 07/12/2007 1:34:03 PM PDT by r9etb
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To: r9etb

LOL!


17 posted on 07/12/2007 1:35:01 PM PDT by Abathar (Proudly catching hell for posting without reading the article since 2004)
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To: Red Badger

Who is building the motor?


18 posted on 07/12/2007 1:36:25 PM PDT by org.whodat (What's the difference between a Democrat and a republican????)
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To: Texas Mulerider

Didn’t the larger Duramax diesels have trouble with the aluminum heads?

Maybe we’ll all see once again that GM never learns.

Remember the Vega? Remember the early GM diesels from the 70s? Remember Firestone 500s?


19 posted on 07/12/2007 1:36:31 PM PDT by Disambiguator
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To: Red Badger
Now you can thumb your nose at all those Pious, er Prius owners..........

I do already.

20 posted on 07/12/2007 1:37:48 PM PDT by from occupied ga (Your most dangerous enemy is your own government, Benito Guilinni a short man in search of a balcony)
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To: Clam Digger
What the hell you want to run off of a hummer?

.....well to start, my balers would be nice.....

.....the rakes and rotary cutter might be over kill.....

.....but plows and disks do work well!.....

Thats an awfully expensive PTO toy!

.....naw, its just a work/farm/hunting truck.....

21 posted on 07/12/2007 1:43:52 PM PDT by cyberaxe (((.....does this mean I'm kewl now?.....)))
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To: org.whodat

China or Mexico?....


22 posted on 07/12/2007 1:45:40 PM PDT by Red Badger (No wonder Mexico is so filthy. Everybody who does cleaning jobs is HERE!.......)
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To: Clam Digger

lots better than the piddly 376ftlbs dcx is putting into their CRD diesels for dodge/ jeep.


23 posted on 07/12/2007 1:48:23 PM PDT by absolootezer0 (Stop repeat offenders. Don't re-elect them!)
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To: Red Badger

I wrote that this was coming 5 months ago.I left a large GM dealership as Ops Mgr. Part of my GM contract was training Chevy dealerships on product knowledge

The 6.6 litre Detroit Diesel/Allison Transmition
is bullet proof offering 368 hp actual and 675 ft torque lbs...dealership software ups torque to 710 ft lbs.....

The heads and 6 speed transmition are proprietary Allison features

Same here on the 4.5 diesel.....4 Years of military r&d in this puppy..............

sneak peek........look for the 6.6 to be available in the Tahoe and Suburban as well


24 posted on 07/12/2007 1:50:03 PM PDT by advertising guy (If computer skills named us, I'd be back-space delete.)
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To: cyberaxe

Sheeeite, I’d love to do my baling from the comfort of an A/C cab, but then it’s hard to see all the snakes I love running over.


25 posted on 07/12/2007 1:53:04 PM PDT by Clam Digger
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To: cyberaxe

Great picture of the Hummer in action. I am just trying to upgrade my humble I6 (200 ci) 65 Mustang vert. Yes, I am jealous.


26 posted on 07/12/2007 1:53:08 PM PDT by bajabaja
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To: advertising guy
The heads and 6 speed transmition are proprietary Allison features Same here on the 4.5 diesel.....4 Years of military r&d in this puppy..............

.....i absolutely love my 3500 w/ the Allison Trans.....

.....will it be available on this new one?.....

27 posted on 07/12/2007 1:54:45 PM PDT by cyberaxe (((.....does this mean I'm kewl now?.....)))
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To: advertising guy

I love my ‘07 Silverado 1/2 ton 4x4 crewcab, 5.3. Driving like a politically correct person, I’ve gotten almost 21 mpg on the open road. This blew me away.

I’d be real interested in this new smaller diesel, but cost and mpg will have to pay out.


28 posted on 07/12/2007 1:59:04 PM PDT by umgud ("When illegals are banned, only greedy businesses and welfare providers will have them)
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To: Clam Digger
baling from the comfort of an A/C cab, but then it’s hard to see all the snakes I love running over.

.....the ole tractor has air and tunes, but it ain't near as a comfy ride as the ole truck.....

.....lol on runnin over stuff, my personal favorite is a field rat nest with the rotary cutter when there are hawks around!.....

.....man! thats great entertainment!.....

29 posted on 07/12/2007 1:59:54 PM PDT by cyberaxe (((.....does this mean I'm kewl now?.....)))
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To: Red Badger

Cool. However, I’m still waiting for a Cummins V-8 to appear in the 1500 series Dodge Rams. They are also planning a V-6 for use in the Dakota and Durango. Both engines are supposed to come out in the ‘09 model year.


30 posted on 07/12/2007 2:00:22 PM PDT by SIDENET (RUH-ROH)
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To: bajabaja
.....thanks.....

.....can you believe that most of these things are either turned into pimp-mobiles or mall queens!?!?.....

.....whatta waist.....

31 posted on 07/12/2007 2:02:59 PM PDT by cyberaxe (((.....does this mean I'm kewl now?.....)))
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To: Disambiguator

I haven’t forgotten! Haven’t bought an American made vehicle since.


32 posted on 07/12/2007 2:03:05 PM PDT by mtnwmn (mtnwmn)
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To: Disambiguator

The Duramaxs are nothing like the original 70s diesels. Alum. as well as material science has come a LONG way in the last 5 years, not to mention the last 10. Not to mention their development with the factory corvette racing teams.

As far as powerplants, I have all the confidence in the world in GM.

This is nice...question is...will this motor make it into the colorado?


33 posted on 07/12/2007 2:05:43 PM PDT by fightinbluhen51
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To: Red Badger

Seems a bit low on torque for my liking - try this:

http://www.pocket-lint.co.uk/news/news.phtml/4796/5820/audi-q7-diesel-passenger-car.phtml


34 posted on 07/12/2007 2:11:44 PM PDT by britemp
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To: Red Badger

Let’s see, we’ve got Duramax, Duratec and Duratorq engines. Between Ford and GM, we’re running out of Duras.


35 posted on 07/12/2007 2:13:20 PM PDT by Larry Lucido (Duncan Hunter 2008)
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To: cyberaxe

yes and on your paddle shift 6 speed......did you read all or did your salesman tell you all that trans can do ?


36 posted on 07/12/2007 2:20:28 PM PDT by advertising guy (If computer skills named us, I'd be back-space delete.)
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To: fightinbluhen51

motor will be in all 50 states


37 posted on 07/12/2007 2:22:46 PM PDT by advertising guy (If computer skills named us, I'd be back-space delete.)
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To: umgud

feature for feature the diesel Tahoe vs gas motor is 2500 msrp more


38 posted on 07/12/2007 2:24:13 PM PDT by advertising guy (If computer skills named us, I'd be back-space delete.)
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To: Red Badger
GM Diesels have always been a weak point in their light truck offerings. Hopefully this is better.

But I can't help but think they should be working on some other stuff besides H2 engines!

And while it might not be a big seller the new Camaro would be nice to get before I'm retired. (The 'stang has been out for years and even the new Challenger looks further along!)

After that a classic RWD coupe would be nice, something like a two door Caprice of old.

It's pretty sad that Chevy and Buick don't have any Rear Wheel Drive cars in their entire family.

39 posted on 07/12/2007 2:27:34 PM PDT by Jack Black
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To: advertising guy
Same here on the 4.5 diesel.....4 Years of military r&d in this puppy..............

Sure just like the 350 olds motor turned diesel. LOL, Will not trust a diesel motor built by GM. I remember the LT4100 Cadillac motor with aluminum heads, they all went bad about 80,000 miles.

40 posted on 07/12/2007 2:36:47 PM PDT by org.whodat (What's the difference between a Democrat and a republican????)
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To: org.whodat

every car maker has had their turn in the barrell
that is not today’s diesel however, not by a damned sight,


41 posted on 07/12/2007 2:48:49 PM PDT by advertising guy (If computer skills named us, I'd be back-space delete.)
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To: absolootezer0

The Mercedes engine in the Jeeps is a much smaller engine (3.0 l vs. 4.5 l).

I’d like this 4.5 diesel in a Pontiac G8, please.


42 posted on 07/12/2007 2:53:23 PM PDT by B Knotts (Anybody but Giuliani!)
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To: advertising guy

Too bad you guys didn’t include fuel retailers in your marketing plans. Last year my mechanic begged Sunoco to give him diesel pumps. They wouldn’t do it.


43 posted on 07/12/2007 3:11:35 PM PDT by nicollo (you're freakin' out!)
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To: nicollo

we sure as hell did include em......the e85 /gas burn engines are stock, the e85 is filling in the west and diesel pups come online in feb where sparce or non existant


44 posted on 07/12/2007 3:14:36 PM PDT by advertising guy (If computer skills named us, I'd be back-space delete.)
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To: Red Badger
Note it said cylinder heads, not cylinders...

I know, I'm just a little gunshy of aluminum heads. In my limited experience with them, if you blow a radiator hose in traffic you're likely to overheat and crack a head by the time you can pull off the road.

Thankfully, I can look forward to several hundred thousand more miles on my Cummins 6B. But even Cummins, I hear, is going to aluminum cylinder heads on their new V6 and V8 engines.

45 posted on 07/12/2007 3:18:13 PM PDT by Texas Mulerider
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To: r9etb

LOL! Thanks a lot, now I have soda sprayed all over my monitor, and a picture of that “diesel hummer” woman in my head! :)


46 posted on 07/12/2007 3:22:34 PM PDT by UndauntedOne
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To: advertising guy

This was in suburban DC. Honestly, I have no idea what was behind Sunoco’s decision, but this poor guy is gonna be screwed if he can’t get diesel pumps. He already had a rough time getting regular supply of Supreme earlier this year.


47 posted on 07/12/2007 3:32:08 PM PDT by nicollo (you're freakin' out!)
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To: UndauntedOne

Just here to serve....


48 posted on 07/12/2007 3:35:12 PM PDT by r9etb
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To: nicollo

what you are describing is an OSHA roadblock since the 70’s. That being contaminated dirt et al as tanks sweat rupture or slow leak into the surrounding area. To change or drop new tanks for diesel, soil samples must be taken and well...................this is where state and federal crooks do their crimes.........Fees and fines are huge and certain...........


49 posted on 07/12/2007 3:36:08 PM PDT by advertising guy (If computer skills named us, I'd be back-space delete.)
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To: Larry Lucido
Let’s see, we’ve got Duramax, Duratec and Duratorq engines. Between Ford and GM, we’re running out of Duras.

Dura Dura Dura -- Isn't what the wily Japanese foe actually said at Pearl Harbor?

50 posted on 07/12/2007 3:36:23 PM PDT by r9etb
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