Lb7 duramax years

Dec 12, 2023 · Let’s take a look at the highlights of other powerplants within the Duramax family that are reliable. LB7 2001-2003. This engine is getting to be pretty old now, but it is still powerful and reliable. So, it’s a good candidate for what are the best years for the Duramax. Because of its age, it’s probably the cheapest Duramax engine around.

Jun 13, 2023 ... ... year-old truck in 2023. this information is only good for the 2002-2004 GM diesel trucks. lb7 Duramax. fuel filters lb7 Duramax dirtymax.LB7 Duramax Engine Tech - Diesel World. Part 1: Short Block Shortcomings and Fixes. When introduced in 2001, there were plenty of naysayers worried that the 6.6L Duramax diesel would never hold up …Chevy / GMC Duramax 01-04.5 LB7 Forums. 01-04.5 LB7 Duramax Powertrain. Follow Forum Create Thread Filters Show: Loading… 1 1 of 469 Go to page. Go. 469. Sticky LB7 Torque Specs. Durallymax; Mar 13, 2010; 2. 26 243K Jan 22, 2023 ...6.6L Duramax diesel timeline identifying factory horsepower and torque ratings for 2001 to current applications. Use this chart to identify the factory output ratings for your Duramax …VIN Code 8 - LML (2011-2016) In 2001 GM replaced the outdated Detroit Diesel 6.5L when they debuted the Duramax LB7. Development of the LB7 began in 1997 when General Motors and Isuzu Motors paired up to create DMAX Ltd and after just over three years, the state-of-the-art 6.6L V8 with four valves per cylinder was ready to be unveiled. At the ...ChevyTech77. 6861 posts · Joined 2015. #6 · Aug 12, 2021. I agree, stock LBZ, doesn’t get much better. An LMM is basically an LBZ with a DPF in the exhaust. Other than injector issues, an LB7 would be next on my list. Some people have good luck with LLYs but most seem to be problematic. 2006 Silverado 2500 4x4. LBZ.Feb 22, 2023 · Here is a list of the best Duramax year models: 2010-2017 Duramax LGH. 2017-2021 Duramax L5P. 2019-021 Duramax LM2. 2014-2021 Duramax LWN. And here are the Duramax year models to avoid: 2001-2004 Duramax LB7. 2004-2005 Duramax LLY: 2006-2007 Duramax LBZ.

RPO LB7 (engine code "1") was first introduced in 2001 and continued until early 2004. It is a 32-valve design with high-pressure common-rail direct injection and an experimental …FAQ's. In 2001 GM introduced the 6.6L LB7 Duramax to the diesel industry, sending a b message to Ford and Dodge that they were now a contender in the light duty diesel truck market. With an available Allison 5-speed automatic to back it up, the LB7 has proven not only to be reliable but also capable of tremendous horsepower and torque gains.SOLD - 2003 Silverado CCSB LB7, stock (for now), PPE Boost Valve, Hypertech Power Programmer III, GN, 285/75R16E BFG A/T's. With a new oil change the oil PSI would be a steady 60psi but towards the end of the oil change interval (with diesel in the oil) it would be about 45 psi. Today we're going to go on a journey and look at every Duramax engine that GM has built, from the LB7 all the way up to L5P. We're going to look at what make... Aug 3, 2007 · The LB7 Duramax diesel is a direct-injected, turbocharged, intercooled, four-valve-per-cylinder V-8 that produces 300 hp and 560 lb-ft of torque. Starting from a blank sheet of paper, the 6.6L ... Every year, millions of people plunge into a period of feasts and fireworks in celebration of Chinese or Lunar New Year. How did this holiday get its start? Advertisement Every yea...Year Make Model Trim Engine Notes ; 2004: Chevrolet: C4500 Kodiak: C4C042 Cab & Chassis - Crew Cab: 6.6L 6599CC 403Cu. In. V8 DIESEL OHV Turbocharged ... Duramax;With LB7 Engine;without California Emissions: Large Variety Of Trusted Brand Partners. We provide top quality parts for the specific make of your diesel truck.

The LB7 Duramax was the first generation of the V8 Duramax engine, and it did quite well. It is a 6.6-liter V8 engine with four valves per cylinder. It also has an …18515 posts · Joined 2005. #9 · Feb 7, 2006. Mine was made in late Febuary of 2005. None of the 2005's had the PTO gear and only a few of the early early 2004 LLY's had it. I swapped in an LB7 C1/C2 clutch drum assy with the PTO gear on it when I did my Suncoast install.The LBZ is great in stock form, but get horsepower numbers above 600, and it needs some upgrades to survive. LMM: 2007.5 Through 2010. The LMM engine ushered in the emissions era of Duramax. Although the LMM is almost the same as the LBZ, which makes it a very good engine, it features several new emissions control devices.Can someone please tell me what years the LB7, LBy, LBz, and LMM where in production. I am about to buy a new truck, and wondering what years models have certain motors in them. I use to own a 2004 LB7, which was an awesome truck, until a cheap air compressor plugged into the cigarette lighter caught the truck on fire. :boobooLB7 Duramax was the first of its kind and it was made to near perfection despite having a few kinks as it was the pioneer. It should be noted that the term “LB7” simply means that the engine was manufactured and established in …

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Chevy / GMC Duramax 01-04.5 LB7 Forums. 01-04.5 LB7 Duramax Powertrain LB7 injector balance rates of 0.0 in park ... cold air intake, edge programmer, 135,000 miles, had 90,000 when I purchased the truck 5 years ago and was told injectors got replaced under warranty at around 80,000. Save Share. Like. Sort by Oldest first …LBZ Duramax Specifications. Manufactured Years: 2006-2007. Engine Design: 6.6L 90-Degree V8 Turbocharged Diesel. Transmission: 6-Speed Auto Allison 1000 Transmission. ZF650 Manual Transmission. Vin Identification:Jan 18, 2024 · 2001 – 2004 Duramax LB7: Source: turbodieselregister. The LB7 Duramax was the first generation of the V8 Duramax engine, and it did quite well. It is a 6.6-liter V8 engine with four valves per cylinder. It also has an engine block made of cast iron with aluminum heads. Overall, it was a very powerful and reliable engine. The first DURAMAX diesel engine, code LB7 debuted in 2000 For the 2001 model year. This 1st generation LB7 Duramax cranked out 300 hp and 520 lb-ft of torque, and was. available in 3/4 and 1-ton trucks. The 6.6-liter V8 turbodiesel engine featured aluminum heads with 32 valves on a cast iron block. It had high pressure, a common rail, …

The most powerful Duramax engine of the bunch is the LBZ which produces more power and torque at the least RPMs. It comes with a power output of 310 bhp at 3000 rpm. The …Diesel of the Week. 1,400-Horsepower Turbocharged LB7 Duramax. Since 2019, Daman Perry has been building up his diesel performance shop DP Customs. To …Chevy / GMC Duramax 01-04.5 LB7 Forums. 01-04.5 LB7 Duramax Powertrain. Follow Forum Create Thread Filters Show: Loading… 1 1 of 469 Go to page. Go. 469. Sticky LB7 Torque Specs. Durallymax; Mar 13, 2010; 2. 26 243K Jan 22, 2023 ...While the Duramax engines seem to be mostly reliable these days, the earlier years exhibited a lot of problems. We can’t recommend the 2001-2004 LB7, the 2004-2005 LLY, the 2006-2007 LBZ, the 2007-2012 LMM, or the 2011-2016 LML. Take a look at the most common complaints about these Duramax engines. 1. 2001-2004 Duramax LB7LB7 High Rail Pressure-LOW FPR voltage. So I've been fighting this problem literally for years now, it's time to figure it out! Problem- at idle, rail pressure starts out at commanded pressure (around 6,000 psi), then after 5-6 seconds, starts slowly building pressure, usually leveling off at around 20-22,000 psi.83 posts · Joined 2013. #15 · Jan 31, 2013. Yeah my 6.0 had custom tuning. But it looks like merchant automotive has some good stuff for my truck including a pump upgrade kit for the t-case. 2003 Chevy 2500HD Regular cab, 4x4, LB7, Allison, 5in Straight pipe DP back, 6in Black Chrome tip, PPE Boost valve, 6k HID lows 159k Miles SOLD. …LB7: 2001 – 2004. As the original Duramax model, the LB7 is still extremely popular with diesel enthusiasts due to its lack of emissions control parts. In general, it’s a very durable and reliable engine. However, as the first models hit the 100,000-mile mark, some issues cropped up. Injector failure was a common problem on the LB7 engines.The factory firing is 1-2-7-8-4-5-6-3, but this new camshaft design changes that to 1-5-6-3-4-2-7-8. Reversing an engine’s firing order isn’t new science, however, as GM gas guys have been doing it for years in with the LS engine 4-7 swap. The Duramax family (LB7, LLY, LBZ, LMM, LML) can suffer from the crankshaft breaking just behind the ...

Jan 20, 2019 ... 2002 duramax diesel has been sitting for 3 years the problem before it stopped running was a fuel pump we replaced that - Answered by a ...

LB7: The O.G. It doesn’t get any simpler than the original 6.6L: the LB7. With the exception of California models, the first Duramax was effectively free of any of the problematic emissions control devices that would be introduced in the years to come.Every year, millions of people plunge into a period of feasts and fireworks in celebration of Chinese or Lunar New Year. How did this holiday get its start? Advertisement Every yea...The LB7 was the first generation Duramax and a great engine that is popular with the hot rod community because it can be tuned to produce as much as 1000HP. In short, the core difference between Duramax LB7 and LBZ is the fact that LB7 has 300 hp and 560 lb-ft of torque with a fuel tank size of 26 Gallons whereas the LBZ …Lb7- great fuel mileage, cheaper, sound better, injectors suck and very good throttle response. Lbz- WAY more power, quieter engine compartment (noisier injectors though), more turbo lag, factory high idle which is great, and the best part is the 6 speed alli. Duallys go really cheap here in so Ohio.The safest Duramax model years you can buy are the models produced from 2011 to 2021. These include the Duramax LGH, Duramax LML, Duramax XLD25, Duramax XLD28, Duramax LWN, Duramax L5P, and Duramax LM2. These engines go a step further to provide better emissions thanks to a diesel exhaust fluid/urea injection feature.The lazy person's guide to starting 2022 with a clean slate. Taking stock of your finances at the end of the year is always a smart move, but it can feel overwhelming—which makes i...💪 WATCH THIS before buying A Used 01-04 Duramax LB7!!! Wade goes over what he looks for when buying a used Chevy/GM Duramax LB7 for the 2001-2004 truck year...What Years Fall Under 6.6L Duramax LB7? In 2001, General Motors discontinued their 6.5L Detroit engine, replacing it with the 6.6L LB7 Duramax engine. The Duramax was a much-needed update: it introduced the new common-rail direct fuel injection system. This improvement decreased emissions, and it improved the engine’s …2001-2004 LB7 Duramax Exergy 12mm Stroker CP3 Pump (LBZ Based) - E04 10107 (0) Reviews: Write first review. SKU: E04 10107. Exergy 12mm Stroker LB7 CP3 Pump Pricing: $2,650.00. Qty: Add to Cart. Item Inquiry ... Year Make Model Engine Liters: ...RPO LB7 (engine code "1") was first introduced in 2001 and continued until early 2004. It is a 32-valve design with high-pressure common-rail direct injection and an experimental …

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Yahoo Small Business just came out with an offer to give every small business in pandemic recovery a free website for a year. Small businesses looking to connect with customers can...RPO Regular Production Option Codes (Engine Series) There have been seven Duramax turbodiesel engines since their introduction at the turn of the new millennium: LB7 – 2001 to 2004, 300 horsepower, 520 pound-feet. LLY – 2004 to 2005, 310 horsepower, 520 pound-feet. LBZ – 2006 to 2007, 250 to 310 horsepower, 460 to 605 …LB7 can't get a P2563 or P003A as they're a fixed geometry turbo from the factory with a mechanical wastegate. The stage 1 powermax turbos aren't bad but they also aren't great. The aftermarket really has the drop-ins nailed to where a small 63-64mm drop-in typically spools faster and makes more power than a box stage 1 powermax.2017-2019 Chevrolet HD and GMC HD trucks with the L5P Duramax have a max tow capacity of 23,300 lbs. In 2020, GM’s engineers overhauled the trucks and increased tow capacity by 52%. 2020 Chevrolet HD and GMC HD trucks with L5P Duramax engines have a max tow capacity of 35,500 lbs. Then, in 2021, slight revisions improved …The LB7 is the original production 6.6L Duramax V8. Following success with the performance and reliability of the LB7, this engine became the building block of the Duramax line all the way up until today. Fuel economy on the LB7 was stout at around 20mpg and the IFS suspension included on the HD’s of … See moreAs the year wraps up, it's time to start thinking about deadlines—and there are a handful of financial deadlines to meet by the end of the year. Here are a few money moves you shou...Chevy / GMC Duramax 01-04.5 LB7 Forums. 01-04.5 LB7 Duramax Powertrain LB7 injector balance rates of 0.0 in park ... cold air intake, edge programmer, 135,000 miles, had 90,000 when I purchased the truck 5 years ago and was told injectors got replaced under warranty at around 80,000. Save Share. Like. Sort by Oldest first …Mar 21, 2023 · The 6.6-liter Duramax LBZ was a short-lived engine only available for two model years. To meet increasingly strict emissions standards, the LBZ was a more aggressively tuned version of the previous LLY engine. Mechanically, the LBZ used the same Duramax parts as the LLY, but the LBZ generated 360 horsepower, while the LLY only generated 310 ... Found some for a 2003 LB7 to 2004.5-2005 LLY and LB7 to 2006-2007 LBZ. I think the key is that the 2006 LLY was mated to a 6 speed, unlike the 2004.5 and 2005 models. An 06 "LLY" is mechanically an LBZ... so forget the LLY part altogether. You're attempting to swap an LBZ into an LB7 truck.2001 – 2004 Duramax LB7: Source: turbodieselregister. The LB7 Duramax was the first generation of the V8 Duramax engine, and it did quite well. It is a 6.6-liter V8 engine with four valves per cylinder. It also has an engine block made of cast iron with aluminum heads. Overall, it was a very powerful and reliable engine.2001 Duramax. The RPO LB7 (engine code “1”) was first introduced in 2001 and continued until 2004. This is a 32-valve design with high-pressure common-rail direct injection and aluminum cylinder heads. … ….

6.6L Duramax diesel timeline identifying factory horsepower and torque ratings for 2001 to current applications. Use this chart to identify the factory output ratings for your Duramax …BradSchaefer. 157 posts · Joined 2019. #12 · Jul 30, 2023. My stock LB7 does pretty good for towing. Probably not as good as the duramax trucks with the VGT. I pulled a 18ft cargo trailer 2400 miles round trip from Illinois to Florida and back. Fuel averaged 10.0 empty and 9.9 loaded to 12,000 on the trailer.Business of Your Life Financial Planner Alicia Reiss joins Yahoo Finance Live to discuss how one should spend a year-end work bonus, tax implications, and long-term financial goals...Mar 30, 2023 ... Comments19 · The LMM Duramax - Reliability & 5 Common Problems · Loudest Duramax 9 Blade Turbo I Could Find! · How to Build a 500WHP Duram...Good block and rotating assembly. Injectors are the only weak part really. The fixed geometry turbo has a bit more lag than the new VVT's but still works well. The LB7's has some of the more advanced and more available things due to the fact that they have been out the longest. Good luck with the buy.Chevrolet Silverado, which has consistently been designed with reliable engines. . The LB7 Duramax engine is a turbocharged, intercooled V8 that produces 300 hp and 560 lb-ft of torque. The engine ...Duramax History, Lesson 3: LBZ. December 10, 2018. Story By. Mike McGlothlin. By the time the LBZ came along, the LB7 ’s injector issues had long been solved and the overheating issues associated with the LLY were a thing of the past. This engine’s beefier block casting, stronger connecting rods, higher pressure common-rail fuel system and ...What Years Were the LB7 Duramax? The LB7 Duramax can be found in the 2001-2004 Chevrolet Silverado HD and GMC Sierra HD. It was also used in the Chevrolet Kodiak and GMC Topkick, which were …I own a 2002 HD 4x4 Silverado crew cab Duramax. It's now time to do some work to it after 14 yrs. of relatively pain free driving/towing. Bought new in San Diego Nov. 2001. Atm - 119,800 miles. Warranty injector replacement at 35k miles. Symptoms: 1. About a year ago started to set a check engine light (P1093)Low fuel rail pressure) while towing.Every year, millions of people plunge into a period of feasts and fireworks in celebration of Chinese or Lunar New Year. How did this holiday get its start? Advertisement Every yea... Lb7 duramax years, The motor, sometimes referred to as Baby Duramax, was slated to be offered in GM’s light duty pickup trucks – the Chevrolet Silverado 1500 and GMC Sierra 1500 – for the 2010 model year. , Nov 5, 2020 ... The LB7 Duramax engine made its debut on Chevrolet and GMC HD trucks in 2001. These diesel engines are where the Duramax started, ..., VIN Code 8 - LML (2011-2016) In 2001 GM replaced the outdated Detroit Diesel 6.5L when they debuted the Duramax LB7. Development of the LB7 began in 1997 when General Motors and Isuzu Motors paired up to create DMAX Ltd and after just over three years, the state-of-the-art 6.6L V8 with four valves per cylinder was ready to be unveiled. At the ..., The LB7 Duramax diesel is a direct-injected, turbocharged, intercooled, four-valve-per-cylinder V-8 that produces 300 hp and 560 lb-ft of torque. Starting from a blank sheet of paper, the 6.6L..., While that LB7 platform was replaced with the LLY in the middle of 2004, the basic internal design of the Duramax has been left virtually unchanged up to the 2016 model year. Sure, it received some updates and changes as the years went on to better fit emissions requirements, but there is no doubt that the Duramax engine has been a …, The 6.6-liter Duramax LBZ was a short-lived engine only available for two model years. To meet increasingly strict emissions standards, the LBZ was a more …, This newly formulated Custom Age 625+ super-alloy demonstrates superior fatigue cycle life, tensile strength and toughness – with complete resistance to atmospheric corrosion and oxidation making it best suited to extreme, high horsepower competition builds on LB7/LLY/LBZ/LMM/LML Duramax 6.6L engines manufactured from 2001-2016., Year Make Model Trim Engine Notes ; 2004: Chevrolet: C4500 Kodiak: C4C042 Cab & Chassis - Crew Cab: 6.6L 6599CC 403Cu. In. V8 DIESEL OHV Turbocharged ... Duramax;With LB7 Engine;without California Emissions: Large Variety Of Trusted Brand Partners. We provide top quality parts for the specific make of your diesel truck., VIN Code 8 - LML (2011-2016) In 2001 GM replaced the outdated Detroit Diesel 6.5L when they debuted the Duramax LB7. Development of the LB7 began in 1997 when General Motors and Isuzu Motors paired up to create DMAX Ltd and after just over three years, the state-of-the-art 6.6L V8 with four valves per cylinder was ready to be unveiled. At the ..., Let’s take a look at the highlights of other powerplants within the Duramax family that are reliable. LB7 2001-2003. This engine is getting to be pretty old now, but it is still powerful and reliable. So, it’s a good candidate for what are the best years for the Duramax. Because of its age, it’s probably the cheapest Duramax engine around., The L5P Duramax is the latest version of the Duramax V8 diesel engine. (engine code Y). Introduced in the 2017 model year, it was the most powerful diesel engine GM had produced, with 445 hp (332 kW) at 2,800 rpm and 910 lb⋅ft (1,234 N⋅m) at 1,600 rpm. Design specification performance can exceed 550 bhp (410 kW) at 3,050 rpm and 1,050 lb⋅ ..., Can someone please tell me what years the LB7, LBy, LBz, and LMM where in production. I am about to buy a new truck, and wondering what years models have certain motors in them. I use to own a 2004 LB7, which was an awesome truck, until a cheap air compressor plugged into the cigarette lighter caught the truck on fire. :booboo, Each injector has a $75 core charge and is fully refundable if they are shipped back within 90 days. All Industrial Injection / OEM products are covered by a one year/unlimited mile warranty. When replacing the injectors in your LB7 Duramax we highly recommend replacing the injector fuel lines to avoid new injector contamination. The most ..., Engine: 6.6L LB7 Duramax V8 with Bosch common-rail injection system. Transmission(s): Allison 5-speed automatic, ZF-6 6-speed manual. Best Year(s): Any year, as long as all 8 injectors have been replaced with genuine Bosch re-man units. Price Range: $7,000 to $15,000 Pros: Common-rail injection; Quiet operation; 450 hp is possible with a …, Nov 5, 2020 · Here is our guide to the 7 most common 6.6L LB7 Duramax problems and how to fix them. 1. LB7 Duramax Injectors. The most notorious LB7 Duramax problem is their original injectors. Even GM acknowledged their problems when they corrected the original injector design and issued a 200,000 or 7-year warranty on the updated model. , Sep 4, 2014 ... Dealer says its the mid year 2007.5 model having the newer LMM engine setup. They place we got the engine send us the Long Block labeled LB7. I ..., We analyzed the largest U.S cities and ranked them on four different categories to come up with the list of best cities for keeping New Year's Resolutions. Check out our full ranki..., At the core of the K15’s transformation is the formidable ‘03 LB7 Duramax engine, which is more than capable of robust performance. Stingel’s LB7 makes a cool 1,300 horsepower at 4,000 rpm and an impressive 1,900 lb.-ft. of torque at 3,400 rpm. Wyatt’s expertise and commitment to pushing the boundaries of diesel power are evident in the ..., Engine: 6.6L LB7 Duramax V8 with Bosch common-rail injection system. Transmission(s): Allison 5-speed automatic, ZF-6 6-speed manual. Best Year(s): Any year, as long as all 8 injectors have been replaced with genuine Bosch re-man units. Price Range: $7,000 to $15,000 Pros: Common-rail injection; Quiet operation; 450 hp is possible with a …, News. Follow our GM Duramax news coverage. Sponsored Links. Complete information, specs, power and torque ratings on the GM Duramax turbo-diesel engines used in GM …, 2001 – 2004 Duramax LB7: Source: turbodieselregister. The LB7 Duramax was the first generation of the V8 Duramax engine, and it did quite well. It is a 6.6-liter V8 engine with four valves per cylinder. It also has an engine block made of cast iron with aluminum heads. Overall, it was a very powerful and reliable engine., The L5P Duramax is the latest version of the Duramax V8 diesel engine. (engine code Y). Introduced in the 2017 model year, it was the most powerful diesel engine GM had produced, with 445 hp (332 kW) at 2,800 rpm and 910 lb⋅ft (1,234 N⋅m) at 1,600 rpm. Design specification performance can exceed 550 bhp (410 kW) at 3,050 rpm and 1,050 lb⋅ ..., Engine: 6.6L LB7 Duramax V8 with Bosch common-rail injection system. Transmission(s): Allison 5-speed automatic, ZF-6 6-speed manual. Best Year(s): Any year, as long as all 8 injectors have been replaced with genuine Bosch re-man units. Price Range: $7,000 to $15,000 Pros: Common-rail injection; Quiet operation; 450 hp is possible with a hot ..., The new year can be a meaningful time to implement a momentous change. But not everything needs to be a total overhaul—small, simple changes can have surprisingly powerful effects...., While the Duramax engines seem to be mostly reliable these days, the earlier years exhibited a lot of problems. We can’t recommend the 2001-2004 LB7, the 2004-2005 LLY, the 2006-2007 LBZ, the 2007-2012 LMM, or the 2011-2016 LML. Take a look at the most common complaints about these Duramax engines. 1. 2001-2004 Duramax LB7, The name Duramax was chosen for the new engine to signify durability and maximum power, cleanliness, and fuel economy. The new engine created and built by DMAX Ltd was a 6,599 cubic centimeter (6.6 Liter), direct-injection, turbo-charged Diesel V8 with 90-degree placement, aluminum cylinder heads, and 32 overhead valves. , Here is our guide to the 7 most common 6.6L LB7 Duramax problems and how to fix them. 1. LB7 Duramax Injectors. The most notorious LB7 Duramax problem is their original injectors. Even GM …, After more than 15 years of progression, R&D and pushing the limits of the platform, Wade has once again raised the bar with his latest compound turbo LB7 Duramax engine aimed at 2,000 horsepower. Find out what went into the custom build! By Greg Jones. Greg Jones is Content Director and Editor of Engine Builder Magazine. …, Quick spool up. Big power. Great daily driver. Models available for 2001-2016 Duramax (LB7, VVT, LML) Stealth 67G2: Our test truck, the well known Apachemax, is a 1958 Chevrolet Apache modified onto a 2003 Silverado 2500HD frame. We dropped a built LB7 engine with 100% Exergy Injectors, 12mm Exergy Cp3, and all the supporting mods to …, 12 Days of Christmas! - https://bit.ly/3oGRWptIn today's video Dustin sits down to talk about the ever-popular (but injector issue having) LB7 Duramax. This ..., The Duramax That Defies All Logic. Unbelievably, Buddy campaigns a bone-stock, 300,000-mile LB7 Duramax. And being that his truck has been as quick as 5.73 in the past, he lays claim to the fastest stock engine LB7 Duramax in the world. No hard-part changes have been made. Even the factory head bolts are still intact!, 2000 – GM debuts the LB7 Duramax diesel engine with 300 hp and 520 lb-ft torque in ’01 ¾- and 1-ton trucks., Chevrolet Silverado, which has consistently been designed with reliable engines. . The LB7 Duramax engine is a turbocharged, intercooled V8 that produces 300 hp and 560 lb-ft of torque. The engine ...