Results 1 to 10 of 10

Thread: 2011 Chevy Silverado 2500 HD Duramax

  1. #1
    Vulture of The Western World Eric's Avatar
    Join Date
    Jul 2006
    Location
    The Land of The Edentulites
    Posts
    22,719

    2011 Chevy Silverado 2500 HD Duramax

    Among the heavyweights - diesel-powered 2500 series pick-ups - there are just two contenders:

    The reigning champ, Ford's F250 Super Duty - and the challenger, Chevy's updated Silverado 2500 HD.

    Both are brass-knuckled, big-armed humungoids capable pulling over 16,000 pounds and boasting torque numbers in excess of 750 lbs.-ft. that make even the biggest big block gas V-8 seem a little light in the loafers.

    Are you ready to rumble?

    WHAT IT IS

    The Silverado 2500 HD is a full-size, heavy-duty truck with beefier construction and more capability than a 1500-series pick-up. The tested model was equipped with the optional 6.6 liter Duramax diesel V-8 and six-speed Allison automatic transmission.

    The truck can be ordered in regular cab, extended cab and crew cab configurations, with short (6.5 foot) or long (8 foot) beds and 2WD or 4WD.

    Base price for a regular cab Work Truck is $27,965. A top-of-the-line LTZ Crew Cab starts at $44,255. The Duramax diesel engine is a big-ticket option, with a sticker price of $7,195. If you select this engine you must also buy the mandatory six-speed Allison automatic, which adds another $1,200.

    Since the diesel-equipped Silverado 2500 HD is so much more expensive than gas V-8 versions of the Silverado 2500 - and has capabilities far beyond the gas-powered version - it can be considered a sub-model in its own right and will be the sole focus of this write-up.

    WHAT'S NEW FOR 2011

    The skin's the same but underneath the hood there's a major uptick in power. The 6.6 liter Duramax diesel is now rated at 397 hp (up from 365) and 765 lbs.-ft of torque (up from 660 previously).

    In addition to the power uptick, the Duramax diesel also features big rig-like exhaust braking.

    Chevy has also bulked up the already stout fully-boxed steel frame and made some changes to the front suspension for increased strength, including new-design forged steel upper control arms that up the front axle weight rating by 25 percent. If you want to hang a snowplow blade on your '11 2500 HD, this will be welcome news.

    WHAT'S GOOD

    A damn sight more than Tough Enough.

    Class-leading power and capability; the 2500 Chevy with the Duramax V-8 has higher maximum torque output and can pull more weight than the previous Numero Uno, Ford's F-250 equipped with the optional PowerStroke diesel V-8.

    Exhaust braking is too cool for school.

    Factory-installed adjustable electronic trailer brake controller.

    Handsome, functional interior.

    Rides as smoothly and quietly as Bentley once underway.

    WHAT'S NOT SO GOOD

    Forbidding price of entry to get that Duramax V-8. With the Allison transmission, you're looking at $10k in drivetrain options alone.

    New diesels come with new hassles, including urea injection that requires regular topping off. Particulate filters, too.

    Down-the-road maintenance costs probably will be higher than you're used to.

    Newly mandated Ultra Low Sulfur Diesel fuel is more expensive - and more expensive than gas, too.

    In a truck this big, the road sometimes seems too small.

    UNDER THE HOOD

    The Duramax diesel is a bruiser. Its 765 lbs.-ft. of torque at just 1,600 RPM is locomotive-like.

    For comparison, the 6.0 liter gas V-8 that's the Silverado 2500's standard powerplant produces 380 lbs.-ft. of torque, or just a little over half the output of the mighty Duramax.

    And for a more fair, diesel vs. diesel comparison, stack up the Chevy's Duramax against the 2011 Ford F-250 Super Duty's 6.7 liter PowerStroke V-8, which maxes out at 735 lbs.-ft. (The Dodge Ram 2500 with its optional 6.7 iter Cummins diesel is a very distant third place, with 650 lbs.-ft. of torque.)

    The massive power output pushes the Chevy's maximum tow rating to the top of the pile - 17,000 pounds (21,700 pounds with fifth wheel) vs. 16,000 (and 21,600) for the Ford PowerStroke.

    The Dodge Ram is way back there, maxing out at 12,000 pounds (17,000 with fifth wheel). It's not even in the same league as the Silverado Duramax and Ford F250 PowerStroke if the measure is power/capability.

    Payload capability is the only area where the big Chevy's not The King. It maxes out at 3,872 pounds vs. 4,050 for the F250.

    Mileage figures for the Duramax V-8 weren't available at the time of this review, but should average out to about 18-19 MPGs.

    ON THE ROAD

    Piloting a rig like this is Big Fun - if you are into big trucks. The next step up, after all is pretty much a Kenworth.

    Even so, you are pretty close to that already.

    The Silverado 2500 Duramax even has exhaust braking, just like a big rig. When engaged, an electronically controlled butterfly valve in the exhaust system closes, restricting the exhaust flow - which provides an engine braking effect that helps prevent the vehicle from building up excessive speed, without the need to constantly ride the brakes. This provides both a safety and a wear and tear advantage. The vehicle is less likely to become a "runaway truck" when going down a mountain pass - and your brakes should last longer, too.

    The Duramax diesel is a manly powerplant, but you can tune out its testosteronic rumblings by the simple act of rolling up the windows. Once the cabin's sealed up, the diesel sounds fade into a pleasant background burble. The six-speed Allison transmission is quiet and smooth - and the ride quality is as stately as the QE II, courtesy of body-on-frame construction and the use of hydraulic biscuits between the body and the frame.

    It's easy to steer; but the turning radius is definitely wide load. This is true of any truck in this class. Behemoths don't like U turns or parking spots at shopping malls designed for Camry-sized cars.

    AT THE CURB

    Current 2500 (and 1500) series trucks are so huge they make a big man feel small - and this is their chief defect, in my eyes.

    I'm 6ft 3 and weigh 210 pounds - which makes me taller than most and bigger than many. But even I have to literally climb aboard the Silverado - and the bed's walls are so high that I feel 10 years old again, trying to get at cargo. No question, this beast can haul three times what my puny little Nissan Frontier can. But except for hauling 4x8 sheets I find that a compact truck is easier to use for everyday jobs, such as hauling trash to the dump.

    Still, there are things this lunker can do without breaking a sweat that my Frontier better not even think about trying. It could literally rip the frame out from under my little Nissan and leave the body sitting there by the side of the road. A truck like this is built of serious work - and it will make serious people very happy.

    My test truck had the three-across front bench with the center section that converts into a console/arm rest. There's an additional storage compartment built into the seat bottom that is huge enough to sash several large handguns and plenty of ammo - or whatever else.

    Like the Ford F250 (and to a lesser extent, the Ram HD) you can outfit the Silverado with Cowboy Cadillac features and amenities - full leather interior, heated power seats with lumbar supports, steering wheel heater, power rear sliding window, Bose premium stereo, Bluetooth wireless, 20-inch rims, GPS and rearseat DVD entertainment system, rearview back-up camera, power adjustable pedals and an EZ Lift tailgate. Snowplow prep and Z71 off-road packages are available, too.

    So equipped, a 2500 HD with the Duramax can sticker out within sight of $60,000.

    Lawsee!

    THE REST

    The one major potential negative is the hassle/expense that comes with the newly mandated "clean" diesels.

    Not just the Duramax - all of them.

    By law, emissions of nitrogen oxide (NOx) have to be down 96 percent from allowable 1996 levels. To get there, Chevy has added what they call Selective Catalytic Reduction, which uses a mix of diesel fuel (injected into the exhaust to raise temperatures), industrial-grade urea and deionized water held in a 5.5 gallon storage tank that's sprayed as a fine mist into the hot exhaust stream, ahead of the catalytic converter.

    This triggers a chemical reaction that converts the NOx in the exhaust into water vapor and nitrogen gas before it exits the tailpipe.

    The tank will need to be topped off as the mix gets low; if you don't, the engine's controller will go into "limp home" mode, with speed limited to 40-55 mph.

    Finding urea for top-offs will mean stopping in at the dealer's more often, or frequenting truck stops - as these are pretty much the only places that sell the stuff right now.

    As for how often, Chevy says it varies with the "duty cycle" the truck is subjected to, but expect to have to do the drill every third fill-up, at a cost of $20-$40 or so.

    GM claims the Selective Catalytic Reduction system is 5 percent more efficient than other systems in use, potentially resulting in $2,400 worth of fuel savings over 200,000 miles.

    But that "savings" may amount to a lot less, once you factor in the cost of feeding the thing urea at $20-$40 a pop once or twice a month. Plus the extra diesel that gets sprayed into the exhaust to torch things up and cut down the smog.

    New "clean" diesels like the Duramax also have particulate filters that add another layer of over-the-road operating costs, vs. older diesels that weren't fitted with all this anti-smog stuff.

    Better for the planet? Maybe.

    But not so much for your wallet.

    THE BOTTOM LINE

    The bar has ben raised for all-out power and capability. No doubt Ford will answer with an even more potent version of its Powerstroke diesel. Dodge will have to come up with something more credible, too. In the meanwhile, Chevy is the new undisputed heavyweight champeen among 2500 pick-ups.

  2. #2
    I've heard on the CB and read on forums that some drivers get around the cost and inconvenience of urea by using distilled water. The truck doesn't know the difference.

    Plus with some mods Duramax/Cummins/Powerstroke can become some seriously fast multi-purpose rigs.

    I prefer a Cummins but this is still damn fast.


  3. #3
    Vulture of The Western World Eric's Avatar
    Join Date
    Jul 2006
    Location
    The Land of The Edentulites
    Posts
    22,719
    Quote Originally Posted by dieseleverything View Post
    I've heard on the CB and read on forums that some drivers get around the cost and inconvenience of urea by using distilled water. The truck doesn't know the difference.

    Plus with some mods Duramax/Cummins/Powerstroke can become some seriously fast multi-purpose rigs.

    I prefer a Cummins but this is still damn fast.

    If you use distilled water instead of urea, won't the computer notice and throw the thing into "limp home" mode?

    And: Yeah, I was thinking how 750 lbs.-ft. of torque (and 397 hp) would feel in something like my little Frontier pickup.... !

  4. #4
    Vulture of The Western World Eric's Avatar
    Join Date
    Jul 2006
    Location
    The Land of The Edentulites
    Posts
    22,719
    Quote Originally Posted by dieseleverything View Post
    I've heard on the CB and read on forums that some drivers get around the cost and inconvenience of urea by using distilled water. The truck doesn't know the difference.

    Plus with some mods Duramax/Cummins/Powerstroke can become some seriously fast multi-purpose rigs.

    I prefer a Cummins but this is still damn fast.

    PS: That guy in the video ran the 1/4 almost as quickly as a new GSX-R or ZX-10R.... Yowsa!

  5. #5
    Quote Originally Posted by Eric View Post
    If you use distilled water instead of urea, won't the computer notice and throw the thing into "limp home" mode?

    And: Yeah, I was thinking how 750 lbs.-ft. of torque (and 397 hp) would feel in something like my little Frontier pickup.... !

    From what I understand the urea solution is mostly distilled water and as long as there is liquid in the tank the computer won't notice.

    The truck in the video has around 900hp on fuel only and around 1100-1200 hp with nitrous. It has a few modifications http://www.dieselpowermag.com/tech/c...lb7/index.html

    Yes, it is damn fast. I was at the US Diesel Truckin' Nationals in E-Town this September and most trucks are not as fast as this, but some were capable of mid-11's.

  6. #6
    Vulture of The Western World Eric's Avatar
    Join Date
    Jul 2006
    Location
    The Land of The Edentulites
    Posts
    22,719
    Quote Originally Posted by dieseleverything View Post
    From what I understand the urea solution is mostly distilled water and as long as there is liquid in the tank the computer won't notice.

    The truck in the video has around 900hp on fuel only and around 1100-1200 hp with nitrous. It has a few modifications http://www.dieselpowermag.com/tech/c...lb7/index.html

    Yes, it is damn fast. I was at the US Diesel Truckin' Nationals in E-Town this September and most trucks are not as fast as this, but some were capable of mid-11's.
    Well, that's some good news!

    I had thought the diesel system would operate like the typical gas-burner car's OBD system and notice anything that deviated from the programmed-in operating parameters.

    It's still a PITAS, even so.

    And of course, diesel fuel is now much more expensive as a result of the new regs.

  7. #7
    Quote Originally Posted by Eric View Post
    Well, that's some good news!

    I had thought the diesel system would operate like the typical gas-burner car's OBD system and notice anything that deviated from the programmed-in operating parameters.

    It's still a PITAS, even so.

    And of course, diesel fuel is now much more expensive as a result of the new regs.

    And diesel fuel now has poor lubrication properties, thanks to 15 PPM sulfur. Anyone who operates a diesel engine made before 2007 should use a fuel additive so the injection pump and other precise internal parts do not wear excessively.

  8. #8
    Vulture of The Western World Eric's Avatar
    Join Date
    Jul 2006
    Location
    The Land of The Edentulites
    Posts
    22,719
    Quote Originally Posted by dieseleverything View Post
    And diesel fuel now has poor lubrication properties, thanks to 15 PPM sulfur. Anyone who operates a diesel engine made before 2007 should use a fuel additive so the injection pump and other precise internal parts do not wear excessively.
    Shit. That's a very good point.

    Is "off road" (red dyed) diesel also 15 PPM?

    Should I use additive for the diesel I feed my tractor?

  9. #9
    Quote Originally Posted by Eric View Post
    Shit. That's a very good point.

    Is "off road" (red dyed) diesel also 15 PPM?

    Should I use additive for the diesel I feed my tractor?

    Off road diesel is at 15 ppm sulfur (same as highway fuel). I would use an additive like Power Service, especially if your tractor was made before 2007. It will also help it start better in cold temperatures (anti-gel).

    I prefer the Diesel Fuel Supplement + Cetane Boost variety.
    http://www.powerservice.com/dfs/

  10. #10
    Vulture of The Western World Eric's Avatar
    Join Date
    Jul 2006
    Location
    The Land of The Edentulites
    Posts
    22,719
    Quote Originally Posted by dieseleverything View Post
    Off road diesel is at 15 ppm sulfur (same as highway fuel). I would use an additive like Power Service, especially if your tractor was made before 2007. It will also help it start better in cold temperatures (anti-gel).

    I prefer the Diesel Fuel Supplement + Cetane Boost variety.
    http://www.powerservice.com/dfs/
    Thanks for the tip; I will order some today.

    My tractor is an early '80s Mitsubishi... so I probably need it!

Similar Threads

  1. 2011 Chevy HHR
    By Eric in forum New Car/Truck Reviews
    Replies: 1
    Last Post: 03-10-2011, 08:10 AM
  2. 2011 Chevy Cruze
    By Eric in forum New Car/Truck Reviews
    Replies: 3
    Last Post: 09-01-2010, 07:34 PM
  3. 2010 Chevy Silverado 1500 hybrid
    By Eric in forum New Car/Truck Reviews
    Replies: 11
    Last Post: 06-08-2010, 03:47 PM
  4. 2007 CHevy 2500HD Duramax - the Big Kahuna
    By Eric in forum New Car/Truck Reviews
    Replies: 0
    Last Post: 06-05-2007, 11:51 AM
  5. Replies: 2
    Last Post: 12-19-2006, 12:36 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •