Gmc duramax diesel

Search from 5871 Used GMC Sierra 2500 cars for sale, including a 1994 GMC Sierra 2500 4x4 Extended Cab, a 2005 GMC Sierra 2500 SLE, and a 2007 GMC Sierra 2500 W/T ranging in price from $1,995 to $139,900. ... Duramax Plus Pkg • Driver Alert Pkg • Suspension Pkg, Off-Road. 45,000. ... With powerful diesel or gasoline powertrain …

Gmc duramax diesel. 6.6L V-8 L5P Features& Specifications. This next-generation redesign offers more horsepower and torque than ever — an SAE-certified 445 horsepower (332 kW) and net 910 lb.-ft. (1,234 Nm) — to enable easier, more confident hauling and trailering. Higher boost pressure from the turbocharger, compared to the previous engine, helps the L5P ...

The exact MPG any engine gets depends on the vehicle it’s used in, but the 6.6-liter Duramax diesel engine gets an EPA-estimated 15 MPGs in city driving and 20 MPGs on highway driv...

Learn more about the GMC Sierra 1500 with the Duramax Turbo Diesel option and shop for this powerful pickup truck in WEXFORD with Wright Buick GMC ...Apr 7, 2023 · The 2024 GMC Sierra 1500 AT4X now comes standard with GM's Duramax diesel 3.0-liter inline-six. While it has less horsepower, the diesel's 495 pound-feet of torque is 35 more than the optional 6.2 ... 2010 Gmc 2500 Duramax 853,500 Odometer miles - sold Nov 2018 2013 LT CCSB SRW bought with 508,000 miles, now over 703,000 miles 2013 CrewCab and chassis with 9' Hillsboro aluminum flatbed 84,000 miles. - Sold Sept 2019 ... Chevy and GMC Duramax Diesel Forum. 3.8M posts 206.5K members Since 2005 A forum community … enhanced 6.6l duramax turbo diesel v8 engine with new turbocharger and allison ® 10-speed transmission Sierra Heavy Duty’s world-class towing capability is enhanced for 2024 with an available 6.6L Duramax Turbo Diesel V8 Engine and an all-new, more efficient turbocharger. In my gas vehicles I now run Walmart's Super Tech full synthetic, as it tested out better than Mobile 1, and costs less ($13.97 vs. $22.98) In my L5P I run Mobil Delvac 1300 Super Heavy Duty Synthetic Blend Diesel Engine Oil 15W-40, it's $10.97 a gallon. I change oil and filters every 5k miles in all my vehicles.The optional Duramax diesel 6.6-liter V-8 cranks out 445 ponies and 910 lb-ft of twist, and it works through an Allison 10-speed automatic. You can also specify either a single- or dual-rear-wheel ...Sep 13, 2021 ... Halfway through the 2004 model year, the second generation of the Duramax diesel engine was introduced in the Chevy Silverado and GMC Sierra ...Diesel locomotives are some of the coolest modes of transport out there. Giant machines like these are just full of technological treats. Explore a hybrid-diesel locomotive — from ...

If you’re in the market for a new pickup truck, you may be considering the 2020 GMC Sierra 1500. The 2020 Sierra 1500 comes with some noteworthy improvements over the previous year...The GMC Sierra, when equipped with a 3.0-liter Duramax diesel, is a seriously refined and potent light-duty workhorse. It’s so smooth and quiet your passengers might never know it’s a diesel.With GMC’s Duramax Turbo-Diesel engines — efficiency and durability are just the beginning. Learn about how GMC was able to engineer available optimized diesel power under the hood of the 2023 GMC Sierra Heavy Duty, Sierra 1500 and Yukon.In short, any good diesel oil will be fine in your truck as long as it meets the specs required by GM. 2005 GMC Sierra 2500HD SLT 4X4 CCSB Silver Birch Metallic /. 6.6 Duramax / 5 Speed Allison 1000 /. S&B Turbo Inlet Mouthpiece /.Learn more about the 2024 GMC Sierra 2500 HD & 3500 HD Denali luxury heavy-duty trucks available specs, trims and features. Vehicle Specs | 2024 Sierra 2500HD & 3500HD Denali ... MORE FROM GMC: VIEW ALL VEHICLES > DIESEL LINEUP > CERTIFIED USED VEHICLES > CURRENT OFFERS > VIEW INVENTORY > SHOP ONLINE > TAKE A …In my gas vehicles I now run Walmart's Super Tech full synthetic, as it tested out better than Mobile 1, and costs less ($13.97 vs. $22.98) In my L5P I run Mobil Delvac 1300 Super Heavy Duty Synthetic Blend Diesel Engine Oil 15W-40, it's $10.97 a gallon. I change oil and filters every 5k miles in all my vehicles.

SIERRA 3500 HEAVY DUTY. Starting At: $46,200†. As Shown: $66,595†. BUILD & PRICE. Choose either a 2024 GMC Sierra 2500 HD or 3500 HD, and begin building your own personalized heavy-duty pickup truck. If you’re in the market for a new pickup truck, you may be considering the 2020 GMC Sierra 1500. The 2020 Sierra 1500 comes with some noteworthy improvements over the previous year...The 2024 GMC Sierra 2500HD is a heavy-duty pickup truck available in two-door regular-cab, four-door extended-cab (Double Cab) and four-door crew-cab configurations matched with the standard 6.8 ...The 2015 Chevrolet 2500HD powered by a Duramax 6.6-liter turbo-diesel V8 engine offers a towing capacity of 17,900 pounds, while the model featuring a gasoline-fueled Vortec 6.0-li...We would like to show you a description here but the site won’t allow us.

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If there is no water and the light stays on you have a sensor problem. If there is water and the light goes off and back on a few miles down the road it’s time to drain your tank and get fresh fuel. The diesel 911 is for gelled fuel emergencies in freezing weather so there’s no reason to be using it for this. 2021 GMC 2500 AT4.LLY Duramax Specifications Chart. Manufactured Years: 2004-2006. Engine Design: 6.6L 90-Degree V8 Turbocharged Diesel. Transmission: 2004-2005: 5-Speed Auto Allison Transmission. 2006: 6-Speed Auto Allison Transmission. Vin Identification:The Duramax diesel engine is one of the primary motors in a General Motor (GM) truck. While these engines are reliable and durable, a few model years have specific problems you would want to avoid. This article gives detailed information on Duramax years to avoid down to the best Duramax model years you can consider buying and also …Choose either a GMC Sierra 2500 HD or 3500 HD and learn more about the vehicle specs, trims, and features available. 2024 Sierra 2500HD & 3500HD | Specs Selector | Pickup Truck ... MORE FROM GMC: VIEW ALL VEHICLES > DIESEL LINEUP > CERTIFIED USED VEHICLES > CURRENT OFFERS > VIEW INVENTORY > SHOP ONLINE > …Oct 4, 2022 ... Follow these maintenance tips to ensure you can get all the benefits of a durable Duramax Diesel engine. Learn how to refill the Diesel ...New Arrival. 2004 GMC Sierra 2500HD 4 Dr SLE 4WD Crew Cab SB HD. 192,798 mi. 6.6L V8 Diesel. $12,995. Est. $206/mo.* Good Deal. Power Package. Suspension Package. …

The GMC Sierra HD AT4X boasts the impressive available 6.6L V8 Duramax Turbo-Diesel paired with a 10-speed Allison automatic transmission that delivers 975 lb.-ft of torque (at 1,600 rpm), 470 horsepower (at 2,800 rpm). The available 6.6L Duramax Tubo-Diesel also offers enhanced exhaust brake performance for improved control when towing and ...Mileage: 5,732 miles Color: White Body Style: Pickup Engine: 8 Cyl 6.6 L Transmission: Automatic. Description: Used 2024 GMC Sierra 3500HD SLE with Four-Wheel Drive, Value Package, Trailer Brake Controller, Protection Package, Heated Steering Wheel, Camper Package, Alloy Wheels, Remote Start, Keyless Entry, Tinted Windows, and …If you ask us, the 3.0L Duramax’s 277hp factory rating (at the crank) is underrated. It Loses The Towing Battle, But It’s Plenty Capable. With a max tow rating of 9,300 pounds, a Duramax-propelled half-ton Chevy Silverado or GMC Sierra 1500 falls short of the 11,400-pound rating from Ford and the new 12,560-pound rating from Ram.Sep 4, 2022 ... The diesel particulate filter (DPF) is a special exhaust filter that collects and traps any kind of particulate substance, such as ash and soot, ... 40+ members. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The Fora platform includes forum software by XenForo. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. A 2-wire connector on the WIF (water in fuel) sensor, which is attached to the bottom of the fuel filter, conveys whether the sensor detects water in the fuel. The cost of this component is around $25, and the labor cost is 1 hour. The WIF is released together with the fuel filter when it is removed.The GMC Sierra HD AT4X boasts the impressive available 6.6L V8 Duramax Turbo-Diesel paired with a 10-speed Allison automatic transmission that delivers 975 lb.-ft of torque (at 1,600 rpm), 470 horsepower (at 2,800 rpm). The available 6.6L Duramax Tubo-Diesel also offers enhanced exhaust brake performance for improved control when towing and ...At a starting price of $84,795 and an as-tested price of $104,175 after adding the AEV package, Duramax diesel, and paint, that is not the quality GMC customers …1,152 Reviews. Save Search. Filters. Location. Enter ZIP Code. 50. miles of. Make & Model. GMC Sierra 2500HD. GMC Certified Pre-Owned. Year. Any Year. Price. Any Price. …

Over the engine’s lifespan it has gone through 6 different engine variations: LB7, LLY, LBZ, LMM, LML, and L5P. From the first generation to the one currently in production today, the 6.6L Duramax has nearly double its horsepower and torque, from 235hp and 500lb-ft. in 2001 to 445hp and 910ft-lb. today. And along the way the engine has become ...

May 1, 2023 ... @kyle_fizel and his clean LB7! #diesel #diesels #dieseltrucks #trucks #Cummins #Powerstroke #Duramax #Chevy #Ford #Dodge #Fordtrucks #GMC…Introducing the next generation 2024 GMC Canyon, featuring an 310-HP Turbomax engine, Bose Premium Audio Systems, and an 11.0" Diagonal driver info center.12 posts · Joined 2015. #1 · Oct 25, 2017. We had a 2011 Chev Silverado 3500 with the DMax. We had a multitude of problems with it, including emission control items such as a bad def injector, a failed def heater etc. We tow with the rig and are often in wilderness areas with no cell service. We bought a new 2015 Silverado 3500 with the DMax.Diesel fuel prices keep breaking records this week but no one is celebrating. On May 6, the average cost for a gallon of diesel fuel in America is $5.51. In many locations, it's co...Popular Years for GMC Diesels. Search over 3,092 used GMC Diesels. TrueCar has over 665,040 listings nationwide, updated daily. Come find a great deal on used GMC Diesels in your area today!The Sierra HD is a heavy-duty truck with a diesel powertrain that offers quick and smooth performance and helpful trailer-assist technology. It also has an independent front …DTC P0420 runs once during an active regeneration event. Conditions for Setting the DTC. The ECM determines that the DOC functionality has degraded below a calibrated threshold, during a regeneration event. The condition exists for greater than 4.5 minutes. Action Taken When the DTC Sets. DTC P0420 is a type B DTC.

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Jun 17, 2022 · The 2011-2016 6.6-liter LML Duramax V-8 engine is the capstone of GM’s Pre-L5P turbodiesels. Here are some vital facts about the iconic truck engine. Buying a used GMC Sierra 1500 can be a great way to get the most value out of your purchase. The Sierra 1500 is a reliable and powerful truck that offers plenty of features and cap... SIERRA 3500 HEAVY DUTY. Starting At: $46,200†. As Shown: $66,595†. BUILD & PRICE. Choose either a 2024 GMC Sierra 2500 HD or 3500 HD, and begin building your own personalized heavy-duty pickup truck. 10 posts · Joined 2020. #1 · May 8, 2020. I purchased a new 2020 GMC Denali 2500 with the Duramax back around March 14, 2020. The truck that I bought had right around 300 miles on it when I bought it. At 521 miles, I got the first CEL and immediately took it to my local GM dealer that happened to be a Chevrolet Dealer.GMC Sierra 3500HD. 5.0 average Rating out of 1 reviews. Starting at $45,600. See GMC Sierra 3500HD Inventory. Edmunds' expert review of the Used 2020 GMC Sierra 2500HD provides the latest look at ...2009 GMC Sierra 2500HD SLE CC/SB 4x4 LMM ... Chevy and GMC Duramax Diesel Forum. 3.8M posts 206.4K members Since 2005 A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more!Jan 27, 2020 ... A Rough 'N Ready GMC Duramax Project Begins · MORE power/better efficiency and fuel mileage · Cruise control · Great brakes · Nicer...Feb 18, 2022 ... Overheating occurs due to their inefficient cooling system, which includes the tiniest radiator and fan ever seen on a Duramax diesel truck.In my gas vehicles I now run Walmart's Super Tech full synthetic, as it tested out better than Mobile 1, and costs less ($13.97 vs. $22.98) In my L5P I run Mobil Delvac 1300 Super Heavy Duty Synthetic Blend Diesel Engine Oil 15W-40, it's $10.97 a gallon. I change oil and filters every 5k miles in all my vehicles.Part Numbers 63369 & 63370 Fits the A-Pillar below commonly found in the following vehicles:• Late 2022+ Chevy/GMC 1500• 2024+ Chevy/GMC 2500/3500. official.bankspower.com. 2004.5 Silver Birch Metallic GMC K2500HD. Traded - 18 Denali CCSB 2500 4WD Mineral Metallic with Cocoa/Dark Sand Interior. 2024 - Denali Ultimate … ….

Cylinder Numbering LB7. It helps to remember a few things. 1) The cylinders/pistons are numbered from "1" at the front of the engine to "8" at the back in the order that the piston rods connect to the crankshaft. It is a simple system. 2) Cylinders 2, 4, 6 & 8 are NOT, I repeat, NOT directly opposite cylinders 1, 3, 5 and 7.If GMC Sierra heavy-duty trucks are known for one thing it’s their raw power under the hood and towing capabilities. GMC is building on the already capable 6.6L V8 Duramax Turbo-Diesel, pairing it with a 10-speed Allison transmission delivering 470 hp (at 2800 rpm) and 975 lb.-ft (at 1600 rpm), offering more power across the entire operating speed range.More videos on YouTube ... 2007 classic LBZ GMC Sierra 2500 HD crew cab SLT short bed 6.6 Duramax diesel lifted extremely low mileage 4X4 pickup. This Florida ...At a starting price of $84,795 and an as-tested price of $104,175 after adding the AEV package, Duramax diesel, and paint, that is not the quality GMC customers …Chevy and GMC Duramax Diesel Forum. 3.8M posts 206.4K members Since 2005 A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! Show Less . Full Forum Listing ...Min. to. Max. Online shopping options. Start your purchase online (434) Show listings with financing, trade-in valuation & dealership appointments available. Trim. Exterior color. …2010 Gmc 2500 Duramax 853,500 Odometer miles - sold Nov 2018 2013 LT CCSB SRW bought with 508,000 miles, now over 703,000 miles 2013 CrewCab and chassis with 9' Hillsboro aluminum flatbed 84,000 miles. - Sold Sept 2019 ... Chevy and GMC Duramax Diesel Forum. 3.8M posts 206.5K members Since 2005 A forum community …2020 GMC Sierra 1500 Diesel is a hauling pro. Available on all but the base trims is a new 3.0-liter Duramax diesel inline-six. Producing 277 horsepower and 460 pound-feet of torque, it's enough ...GMC Sierra HD; 3. 2019–2023 Duramax LM2. The baby Duramax, as it is known, is also a top contender, especially if you don’t need maximum power. This 3.0L …Jun 9, 2020 · If you ask us, the 3.0L Duramax’s 277hp factory rating (at the crank) is underrated. It Loses The Towing Battle, But It’s Plenty Capable. With a max tow rating of 9,300 pounds, a Duramax-propelled half-ton Chevy Silverado or GMC Sierra 1500 falls short of the 11,400-pound rating from Ford and the new 12,560-pound rating from Ram. Gmc duramax diesel, The Duramax™ 6.6L V8 Turbo Diesel Engine is sold with a warranty of 100,000 miles/160,000 kilometers. The Duramax™ has been tested to survive upwards of 200,000 miles/320,000 kilometers. The Duramax™ powertrain is designed for reliability, peak horsepower and torque within its design limits. When a customer installs a power …, 2021 Fuel Milage. I recently upgraded from a very tired 02 LB7 Dmax to a 2021 CC DRW. My truck is generally hooked to a trailer nearly full time pulling up to 20klbs. So far I am less than impressed with the fuel mileage. My 02 pulling the same trailer and load averaged 11-14, empty it would do around 17-18., Duramax 6.6 has always been 15W40, 5W40 and for a little bit early on 10W30. The spec has always been for whatever the latest "Cx" spec was (CJ-4, CK-4 etc). The smaller Duramax's use lighter weight Dexos D spec oils. 06 LBZ 2500 350,000mi 09 LMM 3500 Cutaway 695,000mi 22 L5P 3500 DRW. All currently on road., Mar 27, 2023 · In terms of specs, the big changes are the peak power and torque figures, with the new 3.0L I6 LZ0 turbodiesel Duramax engine producing a maximum of 305 horsepower at 3,750 rpm and 495 pound-feet ... , Save up to $11,515 on one of 2,980 used 2022 GMC Sierra 1500 Diesels near you. Find your perfect car with Edmunds expert reviews, car comparisons, and pricing tools. , Min. to. Max. Online shopping options. Start your purchase online (434) Show listings with financing, trade-in valuation & dealership appointments available. Trim. Exterior color. …, More importantly, the Silverado's Duramax engine balances its strength as a tow option with phenomenal fuel mileage that won't be duplicated by anything other than a diesel. Highway consumption for two-wheel drive models is rated at 33-mpg by the EPA, with 23-mpg listed in city driving., The 2024 GMC Yukon & Yukon XL large SUVs come equipped with features such as Super Cruise, ... thanks to an available 3.0L Duramax Turbo-Diesel engine. , The 6.6L Duramax L5P is the most recent generation of the Duramax 6600 engine family and is found in 2017 to current Chevrolet Silverado, GMC Sierra 2500 HD/3500 HD pickup and chassis cab trucks. It is the most robust and powerful Duramax diesel created to date, producing a peak 445 horsepower and 910 lb-ft of torque. For 2020, a 10 speed …, GM 2.8 Liter Turbo Diesel I4 Duramax XLD28 Engine The XLD28 is a 2.8-liter, four-cylinder, turbo-diesel engine produced by General Motors for mid-size pickup trucks, SUVs, and other diesel-powered ..., Mileage: 5,732 miles Color: White Body Style: Pickup Engine: 8 Cyl 6.6 L Transmission: Automatic. Description: Used 2024 GMC Sierra 3500HD SLE with Four-Wheel Drive, Value Package, Trailer Brake Controller, Protection Package, Heated Steering Wheel, Camper Package, Alloy Wheels, Remote Start, Keyless Entry, Tinted Windows, and …, In short, any good diesel oil will be fine in your truck as long as it meets the specs required by GM. 2005 GMC Sierra 2500HD SLT 4X4 CCSB Silver Birch Metallic /. 6.6 Duramax / 5 Speed Allison 1000 /. S&B Turbo Inlet Mouthpiece /., 40+ members. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The Fora platform includes forum software by XenForo. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. , Gmc sierra at4 1500 4k denali wallpaper cars diesel cab crew offroad car wallpapers duramax suvs pro drivingline glance carbon2024 gmc sierra hd ups luxury, …, The optional Duramax diesel 6.6-liter V-8 cranks out 445 ponies and 910 lb-ft of twist, and it works through an Allison 10-speed automatic. You can also specify either a single- or dual-rear-wheel ..., Fuel injectors are a primary component of all diesel engines. Fuel is drawn from the fuel tank and pushed by the fuel pump to the fuel injectors. The injectors then spray the diese..., 1,152 Reviews. Save Search. Filters. Location. Enter ZIP Code. 50. miles of. Make & Model. GMC Sierra 2500HD. GMC Certified Pre-Owned. Year. Any Year. Price. Any Price. …, If you ask us, the 3.0L Duramax’s 277hp factory rating (at the crank) is underrated. It Loses The Towing Battle, But It’s Plenty Capable. With a max tow rating of 9,300 pounds, a Duramax-propelled half-ton Chevy Silverado or GMC Sierra 1500 falls short of the 11,400-pound rating from Ford and the new 12,560-pound rating from Ram., Choose either a GMC Sierra 2500 HD or 3500 HD and learn more about the vehicle specs, trims, and features available. 2024 Sierra 2500HD & 3500HD | Specs Selector | Pickup Truck SELECT A SIERRA HEAVY DUTY BELOW TO VIEW SPECS , Personally, as of now, the LML years (11-16) are the only ones that I would try to avoid unless the CP4 was replaced with a CP3. The L5P’s seem to be pretty solid. If I ever update from my LBZ I will be looking to jump into a K2 platform L5P most likely. 2006 Silverado 2500 4x4. LBZ., BUILD & PRICE. SIERRA HD. Starting At: $45,400. Tow Up To: 36,000 †. VEHICLE DETAILS. BUILD & PRICE. GMC HUMMER EV PICKUP. Starting At: $96,550. …, Jun 9, 2020 · If you ask us, the 3.0L Duramax’s 277hp factory rating (at the crank) is underrated. It Loses The Towing Battle, But It’s Plenty Capable. With a max tow rating of 9,300 pounds, a Duramax-propelled half-ton Chevy Silverado or GMC Sierra 1500 falls short of the 11,400-pound rating from Ford and the new 12,560-pound rating from Ram. , Volcanic Red Tintcoat 2024 GMC Sierra 2500HD Denali 4WD 10-Speed Automatic Duramax 6.6L V8 Turbodiesel 10-Speed Automatic, 4WD, Atmosphere/Brownstone ... Features and Specs: Listing Information:, Mar 27, 2023 · In terms of specs, the big changes are the peak power and torque figures, with the new 3.0L I6 LZ0 turbodiesel Duramax engine producing a maximum of 305 horsepower at 3,750 rpm and 495 pound-feet ... , Aug 30, 2019 · The GMC Sierra, when equipped with a 3.0-liter Duramax diesel, is a seriously refined and potent light-duty workhorse. It’s so smooth and quiet your passengers might never know it’s a diesel. , Choose either a GMC Sierra 2500 HD or 3500 HD and learn more about the vehicle specs, trims, and features available. 2024 Sierra 2500HD & 3500HD | Specs Selector | Pickup Truck ... MORE FROM GMC: VIEW ALL VEHICLES > DIESEL LINEUP > CERTIFIED USED VEHICLES > CURRENT OFFERS > VIEW INVENTORY > SHOP ONLINE > …, GMC Model: Sierra 2500HD Body type: Pickup Truck Doors: 4 doors Drivetrain: Four-Wheel Drive Engine: 397 hp 6.6L V8 Diesel Exterior color: Pewter Fuel type: Diesel Interior color: Black Transmission: 6-Speed Automatic Mileage: 192,535 NHTSA overall safety rating: Not Rated Stock number: 625637 VIN: 1GT12ZE84FF625637, Gmc sierra at4 1500 4k denali wallpaper cars diesel cab crew offroad car wallpapers duramax suvs pro drivingline glance carbon2024 gmc sierra hd ups luxury, …, , Arriving Spring 2023. The 2024 Sierra HD will also offer a best-in-class 2500 crew cab max towing capacity of up to 22,070 lbs.† and an available max towing capacity of up to …, Volcanic Red Tintcoat 2024 GMC Sierra 2500HD Denali 4WD 10-Speed Automatic Duramax 6.6L V8 Turbodiesel 10-Speed Automatic, 4WD, Atmosphere/Brownstone ... Features and Specs: Listing Information: , Feb 18, 2022 ... Overheating occurs due to their inefficient cooling system, which includes the tiniest radiator and fan ever seen on a Duramax diesel truck., Dec 17, 2019 ... As tested in '20 GMC Sierra 1500 Crew Cab SLT, General Motors' all-new Duramax turbodiesel wins points for its fuel economy and smoothness.