GM Announces Best-In-Class Power Figures for 2011 6.6-liter Duramax V-8 Diesel

GM Announces Best-In-Class Power Figures for 2011 6.6-liter Duramax V-8 Diesel

Just last month, Ford announced that its all-new 6.7-liter Power Stroke V-8 diesel would pound out an incredible 390 horsepower and 735 pounds-feet of torque, giving the F-Series Super Duty best-in-class power ratings for heavy-duty pickups. Now, that short reign is over, according to General Motors.

GM announced that the updated 6.6-liter Duramax V-8 diesel for the 2011 Chevrolet Silverado and GMC Sierra HD pickups will make 397 hp (at 3,000 rpm) and a mind-blowing 765 pounds-feet of torque (at 1,600 rpm). That’s 105 more pounds-feet of twist than the 2010 Duramax V-8. We just warped our keyboard writing that.

The Duramax V-8, dubbed “LML" internally, is the latest generation of GM's HD diesel since it was introduced in 2001. Sixty percent of its parts are new, and Duramax chief engineer Gary Arvan said it will be 11 percent more fuel efficient than the previous LMM Duramax.

Duramax 6.6-liter LML Diesel

A different dyno-rated version of the 6.6-liter Duramax is offered in GM’s HD chassis cab and box-delete models. It’s based on the same new architecture and includes most of the same features as the pickup version, but it is engineered to meet federal certification standards for incomplete vehicles, including the incorporation of a different exhaust-gas recirculation system. It’s rated at 335 hp (at 3,100 rpm) and 685 pounds-feet of torque (at 1,600 rpm).

There are no changes in final power ratings for GM’s 6.0-liter V-8, which continues at 360 hp (at 5,400 rpm) and 380 pounds-feet of torque (at 4,200 rpm).

HD Pickup Truck Comparison Chart

Comments

OK since we're talking about HD truck looks...

My opinion only you're free to agree or disagree.
Pros
GM - the Sierra looks better
Ram or Dodge or whatever you call it - nicest butt (the truck)
Ford SuperDuty - Least boring, most interesting face of all.

Cons
GM - too plain jane looking
Ram or Dodge or whatever you call it - looks like a sad puppy
Ford SuperDuty - looks like a girl who got her face wind-blown back when the truck hauls butt at 120mph - all grafted on a decade-old design

you know its funny. chevy always has to outdue ford on torque and horsepower, but they just can't seem to beat ford where it really matters: towing and payload capabilities. sure your chevy truck is faster and may impress the ladies more, but we'll see whos laughing last when you have to make another trip because you choose speed over work... im not hating chevy's. i love them old school ones.. hell, id take an old charger if i got the change.... lol that hemi rocks...
chevy you build faster trucks, but ford trucks can work harder.

God you guys are pathetic. Look at facts before you blurt out nonsense.
First, of course, GM has the highest HP and TQ numbers.

For those of you saying Ford has a higher payload. Go back and look at the numbers comparing the F-350 to the 3500 in all three configurations 2WD
Reg. Cab:
Ford: 6520 GM: 6335 Difference: 185
Ext Cab
Ford: 5930 GM: 6332 Difference: 402
Crew Cab:
Ford: 5460 GM: 6223 Difference : 763

So yes, Ford has the absolute highest by 185lbs in one particular configuration. But if you want an extended cab or crew cab GM beats Ford by over 400lbs.
Mike even said in one of his previous articles about the Ford payload: "But take a close look at the F-350, where the class-leading payload is limited to one very specific configuration."

So in 2 out of 3 cab configurations GM wins, and GM win's in the power and torque department.

On a side note, I think either the comments should be filtered, or not allowed at all on this site. Too many people spew hate and misinformation.

Payload, hp, torque, blah, blah, blah.

They are simply trying to one up Ford, as always with GM.

Oh well, I'll wait to see which truly performs better, short and long term, and which sells better.

I think I know the answer, but that's just my opinion.

Am I the only one who see this for what it really is? This has got to be a great day for truck fans everywhere because this means that Ford, GM, and Dodge will only keep getting better. Nothing like a little competition to spur innovation!

I will jump on the band wagon with this one, why is it that GM always has just a little more hp/tq but can't tow what the Ford can? From personal experience I always thought Ford pulled heavy loads better than an GM/Chevy... just my two cents.

Lastly although even I have made quacks at GM for taking my hard earned tax money I'm just glad that hard working Americans got to keep their jobs. Its nice to see that money went and did something good for a change. But does this mean that I am going to rush out and buy a GM HD when it comes out? Nope. No solid front axle and it can't tow what the Ford can and the insane fuel mileage numbers being thrown around for the Ford have me sold. Will 7 more HP and 30 more TQ make a world of difference? NOPE! Bring on the shootout I can't wait.

Before anyone says anything I didn't bash GM in this article and I say congrats on a job well done... Now is that new Ford SD out yet so I can buy it? LOL

"Ford Ford Ford Ford Ford!!!!!!!!!!!!! Ford this. Ford that. Frank and Dave are killing this blog with their Ford posts!

GM is the best and the most powerful. I know you Ford fanboys will sleep a little less comfortable tonight knowing that GM is the most powerful truck. 397 hp! Put that in your pipe and smoke it, Frank". - bobby1971

Relax Twerp!!!!

You will never persuade people to think GM trucks are the best. Keep dreaming!!!

--------------------------------------------------------------------

Those GM clowns like to bench race. The real test is out in the real world not some crappy number on papers. I can care less but this is you're typical GM bologna. GM waiting on their tippy toes for the numbers from Ford.

Ha, ha, ha, It looks like Ford set's the industry standard and the rest just follow suit.

GM = Follow the leader.

In the article Mike posted, he quoted. "Just like the Ford", "as you will find on the Ford".

GM copies Ford. The END!!!!

The GM Cheerleaders are out in full force. They are almost as dumb as Howie Long LMAO!!!!

lmao, gm cheerleaders

Are they wearing HD skirts. lol

@ Mike Levine
For the next HD shootout, you should dyno all the trucks at the rear wheels, Diesel and Gas, to see which truck actually puts down the most power and torque at the rear wheels. This way, we will know which trucks actually make the most power and torque. I can't wait for the shootout.

Frank, You made no sense what so ever, your post FAIL.
It has nothing to do with the topic, why bother posting? I mean REALLY how dumb can you be??? we all know how you feel but it's only 7 more HP and 30 more TQ then your beloved truck, so calm down.

"Frank, You made no sense what so ever, your post FAIL.
It has nothing to do with the topic, why bother posting? I mean REALLY how dumb can you be??? we all know how you feel but it's only 7 more HP and 30 more TQ then your beloved truck, so calm down". - Ryan

WTF are you talking about. My post is reflecting other posts. Why don't you take a minute and read the damn post.

I was iterating the fact that GM is a big follower.

However, I am happy for them. GM can go celebrate. You calm down, I speak the truth and back it up with facts.

It takes alot more then a motor to make a truck. When GM figures out how to make a proper truck chassis, then they might actually have a truck instead of an oversized car.

I am a firm believer in the fact that all 3 of the big 3 are in pretty mean sales war. Which is good for all of us. I am a Ford guy but Chevy does have some good ideas. Now am I still a little pissed that OL' Howie Knocking the "Man-step" (my torn up knee says yes). But the fact that GM pushed the envolope is a positive, because it forces Ford and Dodge to improve. Any one of these trucks is more powerful and heavier then what I will ever need. So now that means that I can focus on important things like heated leather seats. Or which has the front suspension that I like the best. I just want a shoot out!

@David, Thats the best ideal I have heard all day. Put all the trucks on a dyno and see what they really do! Either way it looks like these trucks are evenly matched. GM has a slight advantage on Hp/Tq but still can't tow what a Ford Super Duty can. With all the new environmental regulations put on these trucks I don't see to much in the future for aftermarket providers so the power will have to come from the factory.

The bashing does get old sometimes but its still fun to do. I will say congrats to GM for waiting until Ford released their numbers then tweaking the ECM on their motors to get the extra numbers. Bottom line is if these new motors don't get the insane fuel numbers that the new Super Duty is getting then it will only be sold to the GM cheerleaders. I had a feeling this was going to happen, Ford went for MPG while GM only went for Ford. I guess its hard to follow the leader year after year...

Then again ONLY 30 more TQ and 7 more HP are nothing to be cheering about but it is still impressive non the less. Bring on the SHOOTOUT!!!

"I am a firm believer in the fact that all 3 of the big 3 are in pretty mean sales war. Which is good for all of us. I am a Ford guy but Chevy does have some good ideas. Now am I still a little pissed that OL' Howie Knocking the "Man-step" (my torn up knee says yes). But the fact that GM pushed the envolope is a positive, because it forces Ford and Dodge to improve. Any one of these trucks is more powerful and heavier then what I will ever need. So now that means that I can focus on important things like heated leather seats. Or which has the front suspension that I like the best. I just want a shoot out!" - Gabe

I agree 100%. I wouldn't want to be towing when a tie-rod decides to SNAP!!!. It's kind of scary looking especially all those youtube vides.

@Shawn,

God forbid we say a Ford does a job better than a Chevy on this article. Be careful my friend, they will then say you are ruining this post.

Be careful my friend. I warned you.

Ford has the best all around package, GM may now lead by a measly 3.9% more torque and 1.5% more horsepower. But Ford offers all the options that a truck buyer wants. Ford's game is the all around package where as all GM cares about is power numbers. We'll see how these two do on the track. But I'll take the Ford because I'd rather sacrifice 4% of the power for better fuel economy along with all the amenities that Ford offers that GM is too ignorant of the consumer to offer.

Frank
Truth? Facts? PROVE IT
If it says "just like Fords" in the article, it does not mean that GM copied.
Also in this site they say that Ford's diesel design is like 4.5 Duramax diesel design, so most likely Ford copied that design, but it's not a fact.

@Gabe - according to last months sales numbers Ford is kicking the H E double hockey sticks out of GM, Toyota, Dodge, and Nissan. As a whole GM usually sells more trucks but break it down to brand sales and Ford always comes out on top.

Before the GM Fanboys or Cheerleaders get their panties in a bunch Ford F series (not counting Ranger sales either just F Series) outsold Chevy/GM/Colorado combined... nuff said! So as of last month Ford trucks sell more than GM's... I had to say this exactly like this or they will be all over me for being a naysayer and evil person. Just stating the facts.

I love the Man step... and isn't Howie now hocking Honda lawnmowers now or something... I always get confused when I see his commercials lol... Yea Mike Rowe is the way better pitch man IMHO.

I agree 100%. I wouldn't want to be towing when a tie-rod decides to SNAP!!!. It's kind of scary looking especially all those youtube vides.
Posted by: Frank

Check this on out.

Chvys vs Ford. fair fight, baby! 4x vs 4x.

Listen to the crowd. They knows whats up. Ohhhhhhhhhhhhh!!!!!! Ohhhhhhhhhhhh!!!!!!!!!!!!!!!!

Once agein Frank, you just got scooled.

http://www.youtube.com/watch?v=stdyvf9eKtE

"@Shawn,

God forbid we say a Ford does a job better than a Chevy on this article. Be careful my friend, they will then say you are ruining this post.

Be careful my friend. I warned you."
Posted by: Frank


Ford does better job at what?

This is a GM only post, Frank, stop with your Ford nonsene. Go to a Ford post if all you want to do is talk Ford all day long and bash the most powerful truck GM. I know you will sleep a little less comfortable tonight knowing that GM has more power and GM will win the shooout once gain for 2 shoouts in a row.

Bobby1971, there is no way that is a fair fight. It's GM employees at a GM event, the ford was in 2wd, chevy in 4wd, chevy still stood on the brakes while the ford nailed the gas to get the tires loose and then the GM drive away. Stop with your childish videos that are unrepresentative.

@Frank - I'm just a truck fan in general but I must say I have been on a Ford kick the last few years. The only truck I really like to put down is the Tundra. That is one POS right there. I don't have many gripes about GM/Chevy other than the usual Ford vs Chevy flair ups that happen on here, but I think both make a damn good truck. I just wish more people would use more common sense before posting some dumb stuff on here like they do. So you have a youtube video of a Chevy out pulling a Ford, I can go on there and find 100 more video's of a Ford out pulling a Chevy... know what I mean.

Ford waited until GM annouce their towing ratings so they can claim 21,600 on their outdated chassis, GM frame is stiffer and stronger, sure they underrate them to begin with, but I am more confident towing havier loads with GM then Ford. plus GM always had and will always have more power and BEST fuel economy.

Brad: The old super duty numbers surpassed these new GM hauling numbers. And from the test driving of the new super duty articles as well as GM's 11% gain in fuel economy, it appears that Ford will have better fuel economy. And Ford has always and will always have the biggest and best frame. I'd MUCH MUCH rather tow with a ford than any chevy, any and every day. Like I said before, all GM cares about is power numbers.

Look at all these crybaby Ford fans on here screaming that GM waited until Ford released their power ratings to one up Ford. I have news for you Ford boys, the Durmax has ALWAYS been the horsepower and Torque leader in the segement and with the 2011 models that is still the fact today. I just love that GM releases the power figures and the Ford fans are crying like babies. waaa, waaa, waaaa

COMPETITIVE FACTS: Compared with Ford Super Duty’s urea-based system, Sierra HD’s selective catalytic reduction after-treatment system delivers better overall diesel performance, with a range of about 5,000 miles (8,000 km) between DEF refills. Its optimized combustion and after-treatment process provides about 700 miles (1,125 km) between diesel particulate filter regenerations – a better capability than Ford’s.

COMPETITIVE FACTS: Ford’s new Super Duty models share the same transmission between their gas and diesel engines. Sierra HDs’ Allison 1000 and Hydra-Matic 6L90 transmission were developed for the specific horsepower, torque and operating range differences that distinguish the diesel and gas engines.


The details: All 2011 Sierra 2500HD and 3500HD trucks work under the best warranty coverage in America: a five-year/100,000-mile limited powertrain warranty, plus roadside assistance, courtesy transportation and other features that provide assurance that GMC backs its trucks for everything the road offers.

bobby1971,

Are you really that ill-informed. You have made such an astonishment by the lack of intelligence on you're behalf.

The videos you posted are clearly staged at a Chevy Dealership. The same can happen at a Ford or Ram dealer near you.

Here is a video that is not staged. Check it out.

http://www.youtube.com/watch?v=iT6Lqj-_eSo

http://www.youtube.com/watch?v=j0TXG7vVJ5c

http://www.youtube.com/watch?v=AfauOXbqKLQ&feature=related

http://www.youtube.com/watch?v=6_PmoCSqRaw&feature=related

http://www.youtube.com/watch?v=80KNavSXvfs&feature=related

Ok, this is getting sad. No comment.


Jeepguy
Ford did surpass 2010 GM, but not 2011. Here is a qoute from this site. Also if you didn't noticed but GM trucks get new frame for 2011 which is stronger then Fords.

"Heavy duty trucks aren't required to be tested for fuel economy by the EPA," Mikulec said. "But [for the single rear-wheel] truck, we've measured around 15 mpg in the city and about 24.5 mpg on the highway. We have the numbers to substantiate it, but we don't have to put it on the [window] label. There are some limited cases where at 55 mph at a steady state going around a track, we can get over 30 mpg."


@ Bob,

Theoretically speaking it would cut cost to manufacturer one Heavy duty transmission for the whole truck line. Evidently, GM thinks otherwise. This is piss poor management at best.

@ Bob,

Theoretically speaking it would cut cost to manufacturer one Heavy duty transmission for the whole truck line. Evidently, GM thinks otherwise. This is piss poor management at best.

Frank,
Where are those FACTS?

Where is the facts that GM is stronger? GM has a new frame but Ford also re-engineered their suspension for 2011 which I am told was already stronger and better than the GM to begin. Did GM finally add a front end structure to their frame? Probably not.

I bet on here yesterday, that the news Mike had to reveal was the new Duramax would be revealed with it's power and torque figures. I even said, I bet they will go up on the Ford by about 10HP. I was going to say that I also bet Bob would act all silly and get carried away with his 10HP advantage and giggle like a 14 year old girl, and use that to say his truck is best. But I didn't go that far. I would have put money on it though!

This what I'm talking about. Front end structure:
http://www.youtube.com/watch?v=DQET-JW81DE
Look at the GM. No front end structure to the frame.

@ Ryan,

What would you like to know my friend?

I feel like a f'ken fact machine.

@ Mark,

I hope GM is listening. That is unbelievable.

Mark
Thats the most stupidist lame ford commercial EVER!!
I do autobody repair, GM's structure are welded with the fenders which you can unbolt. How whould GM trucks gets 5 star crash rating?

Frank
You said that GM is the follower, where are FACTS?
Only ford dumb boys think that ford is a leader, in fact every brand bring something new to segment and rest follow or make something simmilar, for example GM came up with onstar and Ford recently sync.

Thanks Mark, I had seen that before but forgot about it. Great video. All these people that talk about what "looks tough" really ought to see that.

"GM's structure are welded with the fenders which you can unbolt". - Ryan

Case in point. Hence, they unbolted the whole front end structure on the Silvy.

"Take the cover off this book, you're holding no book".

LOL!

GM trucks were given poor crash test ratings. You can check this site to confirm it.

@ Ryan,

Why couldn't GM post their numbers first?

The facts are all over this website.

@mark show me link?

@frank I careless what ford dumb boys have to say, do some research, oh sorry forgot, you ford dunbboys can't capable of doing research, all you can do is find BS online.

Frank, LOL oh thats what is bothering you... LOL
thats because Ford unvile their SD last september and GM last month, so who was suppose to release their numbers first? and Ford waited for GM tow ratings so they can claim a higher. and with what? old chassis and old axels? give me a break...

Ford re-engineered their suspension for 2011 in addition to the new engines and tranny.

Ryan, Onstar and Sync are not even remotely the same thing. Amazes me that you think one was inspired by the other.

Mark they changed MINOR things on suspension.

Alex Of coarse sync is inspired by Onstar, exept overall they are not there yet, yes sync has some cool features but you can do almost all that and way more with Onstar.

Per Mike Levine:
"Building the 6.7-liter diesel and six-speed transmission in-house has helped Ford do more than maintain a tighter grasp on powertrain power, quality, reliability and durability. t's also helped Ford improve ride quality by reengineering the truck's suspension system to match the engine's power output from the earliest stages of development to final validation. On the road, this translated into improved ride quality that we noticed in the first five minutes of driving. The standard Tenneco shocks have been retuned with all-new valving, and on the single-rear-wheel KR we drove there were new rear leaf springs with revised spring rates. The result was virtually none of the front-to-back off-balance tipping we felt in the previous truck when it was unloaded from underutilized engine torque."
http://news.pickuptrucks.com/2010/03/first-drive-review-2011-ford-f250-king-ranch-4x4-crew-cab-unloaded-part-2.html

If the Ford frame was already stronger to begin with and they reengineered it in addition to the new powertrain, why is this so hard for you to understand the numbers would go up. Do your own search. I'm no longer doing your homework for you. All of the facts are there if you are willing to see it.

@ Ryan,

The difference between On-Star and Sync is that after one year Sync is still free.

It does not bother me that GM waits on Ford for everything.

Mileage , say no more. Ford Super Dutys are 50 % better in MPGs



The comments to this entry are closed.