Lb7 duramax years - 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...

 
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 …. Physical therapy ucf

We’re going to cover everything you need to know about the Duramax LB7: Origin Story; Engine Specifications & Tech Dive; LB7 Reliability; Performance Upgrades; Origin Story. …8 LB7 Reman Bosch Injectors 45% Over Copper Washers O-rings ... 2001-2004 LB7 Duramax Reman Exergy SAC Fuel Injectors 45% Over (Set of 8) - E01 10116 Fuel Injector Set (0) Reviews: Write first review ... Very few parts are reused. In our years of experience these reman injectors have not exhibited an increased reliability risk.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....Filter fuel better, make sure you always get clean fuel, keep and eye on your balace rates. Great engines, LB7 injectors outflow all other injectors in stock form in terms of lpm and tend to get the best mileage per gallon. LLY is 2004.5 and 2005 some have headgasket issues due to a lacking cooling system.2004 Chevy 3500 CC Dually LB7 Duramax/Allison LT loaded 96k MBRP 4inch exhaust/RPI cold air intake & turbo horn. Save Share. Like. ... Seems I read an 01 would not take an 01 tune back if flashed with a newer year new. Good to know the facts. Thank you Brian . 2016 chevy ltz 3500 srw UA Steamfitter, Local 136 Evansville, IN.Apr 28, 2011 · The only ford diesel worth having is a 7.3 and they lack fuel economy and power. The 6.0 ford could be good if you get it dirt cheap and spend about $10000 in parts to bulletproof everything. Just my opinion and experience. 2001 chevy 2500hd 4x4 ext. Cab long bed lb7. 5" turbo back exhaust into 6" tip. Dec 10, 2018 · 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 ... 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 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.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.Duramax LB7: 2001-2004 model years. As the first Duramax model to be released, the LB7 is still very popular among diesel enthusiasts due to its lack of emission control parts. Generally, it is a very reliable and durable engine; however, once the first model hit the 100,000-mile mark, some issues begin unveiling themselves. ...Marketing automation startup Kaviyo is going to be the first major tech IPO later this year if reports are accurate. As the stock market cooled last year, it led to a dearth of sta...The 2007 LBZ also has the same issues as the 2006 LBZ. In my opinion, and yes I know, opinions are like assholes. Everyone has one and they all stink. If you want a Duramax the 2006-2007 classic is the time that you want to be looking. There is no injector or very little injector harness problem unlike the older LLY.Get the best deals on DuraMax Car & Truck Engines when you shop the largest online selection at eBay.com. Free shipping on many items | Browse your favorite ...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.💪 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...Having trouble with my LB7 and am already half the trucks cost deep in parts. Low boost. Had massive holde in the intercooler. Replaced intercooler still no boost. Pressurized charge system held 20psi for 30 seconds no leaks. Rebuilt turbo with cartridge. New turbo gaskets. Still no boost.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⋅ ...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...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 … 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... Mar 26, 2020 ... An up-to-date walk around and modification list of this 600 hp LB7 Duramax Diesel. Instagram: @raberle7 Facebook: Reid Aberle Email: ...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: ...Jul 9, 2012 · Chevy / GMC Duramax 01-04.5 LB7 Forums. 01-04.5 LB7 Duramax Powertrain Difference in years for lb7 motor. Jump to Latest ... Difference in years for lb7 motor. Duramax 6.6L Model: LB7: LLY: LBZ: LMM: LML: L5P: Production Years: 2001-2004: 2004.5-2006: 2006-2007.5: 2007.5-2010: 2011-2016: 2017-Present: VIN Code (8th digit) 1: 2: D: 6: 8: Y: Engine Size: 6.6L, 403 cubic inches: 6.6L, 403 cubic inches: 6.6L, 403 cubic inches: 6.6L, 403 cubic inches: 6.6L, 403 cubic inches: 6.6L, 403 cubic inches: Head ...May 2, 2016 · 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. 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 …The glow plugs on the LB7's are wired differently depending on whether they are california or federal emissions. (not year) So if you have an 03-04 federal-emissions truck, the glow plugs are wired just the same as the 01-02 LB7's. 06 audi S4, V8/6spd. 05 dmax/allison...always testing something new.Apr 28, 2011 · The only ford diesel worth having is a 7.3 and they lack fuel economy and power. The 6.0 ford could be good if you get it dirt cheap and spend about $10000 in parts to bulletproof everything. Just my opinion and experience. 2001 chevy 2500hd 4x4 ext. Cab long bed lb7. 5" turbo back exhaust into 6" tip. 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. 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...WCFab 2001-2004 GM LB7 6.6L Duramax 4" Stage 2 Intake Kit with Air Box. This high flow, fabricated aluminum intake pipe and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on your diesel for improved engine performance. All new design significantly increases air flow to your turbo producing improved ...Could have meant the LB7 injectors are only good till 150ish, but my best advice, is go to an AG dealer with a sample and pay them $30 to get an Oil Analysis done. It will tell you everything you need to know. -2003 CCSB 6.6 All stock, just straight piped. 235,000kms running strong. 1st set done at 205,000kms-. Like.Chevy / GMC Duramax 01-04.5 LB7 Forums. 01-04.5 LB7 Performance Parts Discussion. What year of Duramax did this come out of? (Intank module) Jump to Latest Follow 3K views 6 ...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.Mar 29, 2017 · 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. 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⋅ ... While it's history stretches back to 1982, we are going discuss the more modern years. The 6.6L was introduced in 2001 and replaced the 6.5L and the company hasn't looked back since. 2001 - 2004.5 LB7. 2001 was the year the 6.6L would be unleashed upon the diesel world. LB7 Duramax 2001-2004. In 2001, GM teamed up with Isuzu and brought another innovation to the diesel crowd and was first to market with a common-rail direct …LB7 Pros. Made in America; Most horsepower and torque ever offered in a diesel pickup at the time (300hp, 520 lb-ft) Aluminum cylinder heads made for a lighter curb weight and improved performance; One of the lightest rotating assemblies of any generation Duramax; Forged-steel connecting rodsGood 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.Lbz engines are prone for broken cranks even at stock power. They have similar injector issues to the lb7, they just cost twice as much. Over returning fuel rates mainly. A built trans, fass and efi live will push you to 530 rwhp. I ran my stock turbo in a compound setup for 60k miles without issue.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...After building a compound turbo LB7 Duramax to the tune of more than 1,200 HP, Dark Horse Diesel owner Mike Maas was hungry for more. He decided to build up another LB7 Duramax with an LML block and is now seeing the potential to hit 2,000 HP. ... For the last couple years of the PRI Show, Frankenstein Engine Dynamics has had an …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. :boobooAs 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 Performance Parts Discussion. What year of Duramax did this come out of? (Intank module) Jump to Latest Follow 3K views 6 ...Oil cooler replacement was recent, and the cab had to come off for that. So, while the early LB7's had the injector issues, Ford has theirs as well. Not sure why your truck is only worth 6K; in Florida, a good southern diesel truck holds a good value. 2003 2500HD 6.6 duramax (LB7) all stock (no mods) Sierraluva.Description. Fitment. Shipping. Duramax 01-04 LB7 Nozzle Set: Full set of new injector nozzles flowing at 45 percent over, capable of 725 RWHP with proper supporting modifications. Biggest nozzles recommended for stock CP3 pump or turbo. Not recommended for frequent or heavy towing applications. Sold as a balanced and …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 pound-feet.The LB7 Duramax was first introduced for the 2001 model year in the Chevrolet Silverado HD, GMC Sierra HD, GMC TopKick (medium duty) and Chevrolet Kodiak (medium duty) trucks. That year also brought the Allison 1000, arguably the first automatic transmission in its class worthy of being mated to a powerful diesel.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 …LB7 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 …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 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.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 medium-duty trucks produced until 2009. The LB7 was introduced in 2001 and used until early 2004 before it was replaced with the LLY Duramax. What Year of ...LB7 Duramax 2001-2004. In 2001, GM teamed up with Isuzu and brought another innovation to the diesel crowd and was first to market with a common-rail direct-injected diesel engine, the LB7. Like every Duramax that followed, it featured 6.6 liters (or 402 cubic inches) of displacement, a cast-iron block with aluminum heads, four valves per ...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.Years later, he has a 1,000-horsepower LB7 Duramax to show off! By Evan Laux. Published: Feb 1, 2023. One of the biggest milestones for someone with a performance diesel truck is hitting the 1,000-horsepower mark for the first time. Four digits is a huge milestone, and one that many builders are inclined to rush to straight out of the gate.Get the best deals on DuraMax Car & Truck Engines when you shop the largest online selection at eBay.com. Free shipping on many items | Browse your favorite ...The second Duramax engine, the LLY, first arrived on the market in mid-2004, with an increase in both power output (310 hp against the LB7’s 300) and torque (590 lb-ft against the LB7’s 520).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 ...Having trouble with my LB7 and am already half the trucks cost deep in parts. Low boost. Had massive holde in the intercooler. Replaced intercooler still no boost. Pressurized charge system held 20psi for 30 seconds no leaks. Rebuilt turbo with cartridge. New turbo gaskets. Still no boost.Apr 2, 2023 ... LLY Duramax Problems & Reliability. 14K views · 1 year ago ... ... The LB7 Duramax - Reliability & Common Problems! ... What Is The Worst Year ...Year Make Model: 2003 Chevrolet / GMC 6.6L Duramax Year Make Model: 2002 Chevrolet / GMC 6.6L Duramax Year Make Model: 2001 Chevrolet / GMC 6.6L Duramax Part Type: High Flow Intake Bundle Kits Availability Remarks: Ships …Year Make Model: 2003 Chevrolet / GMC 6.6L Duramax Year Make Model: 2002 Chevrolet / GMC 6.6L Duramax Year Make Model: 2001 Chevrolet / GMC 6.6L Duramax Part Type: High Flow Intake Bundle Kits Availability Remarks: Ships …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...Common problems with Duramax diesel engines include air in the fuel lines, fuel starvation, water pump failure, overheating, injector failure and harness chafing. Some of these iss...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 ...With all the upgrades, Perry’s Duramax is making somewhere along the lines of 1,400-1,500 horsepower, with a long-term goal of adding a compound-turbo setup and getting closer to 1,800-2,000 horsepower on fuel only. Diesel of the Week is sponsored by AMSOIL. If you have an engine you’d like to highlight in this series, please email Engine ...engine and tranny wise all lb7, lly, lbz, lmm's are probably the most reliable vehicles gm makes our shop has only seen one or two allys come in with actuall issues. and the duramax besides the lb7 injectors and the occasionall cp3 pump are bullet proof. 2002 Crewcab short box 3/4 tonHD lb7 W/Allison stock, ATS DIESEL E-POWER …Duramax LB7 and LBZ are both 6.6L diesel engines. The LB7 is a 1st generation engine, while the LBZ is a 3rd generation Duramax engine. Both engines share many of the same engine parts, including crankshafts, camshafts, connecting rods, blocks, fuel tanks, bore x stroke, and so forth. Despite their similarities, the two engines differ slightly. 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... While it's history stretches back to 1982, we are going discuss the more modern years. The 6.6L was introduced in 2001 and replaced the 6.5L and the company hasn't looked back since. 2001 - 2004.5 LB7. 2001 was the year the 6.6L would be …When it debuted in ’01 model year GM ¾-ton and larger trucks under the RPO code LB7, it introduced the segment to aluminum cylinder heads and high-pressure common-rail injection—two things that make 500rwhp possible with nothing more than a tweaked ECM (think EFI Live). The icing on the cake is that the Duramax remains durable, quiet and ... With this system, you can increase your vehicle’s fuel economy by adjusting the exhaust after treatments. The best Duramax diesel engine year models that are safe to buy include: 2010 – 2017 Duramax LGH. 2011 – 2016 Duramax LML. 2011 – present Duramax XLD25. 2012 – present Duramax XLD28. 2014 – present Duramax LWN. 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...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⋅ ...May 5, 2011 · 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

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!. Raw chitterlings

lb7 duramax years

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 …JRooney Discussion starter. 1 post · Joined 2020. #1 · May 16, 2020. Bought lb7 po says injectors rebuilt all 8 prior to me buying it. No smell of fuel in oil and oil looks clean.Cranks starts and dies doesn’t run long 5sec maybe. Primer does not get hard even after priming and purging. Seems to be pumping though no visible leaks smells ...Remanufactured 6.6-Liter LB7 Duramax Engine - Complete Long Block - Built to Factory New Specifications with Updates - Diesel Experts ... Peak Torque:• 500 lb-ft @ 1,600 rpm (2001 model year)• 520 lb-ft @ 1,800 rpm (2004 model year) Related. Warranty. The 6.6-L Duramax Bare Long Block Engines come with a 1 Year Unlimited Mileage Parts ...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 ...With all the upgrades, Perry’s Duramax is making somewhere along the lines of 1,400-1,500 horsepower, with a long-term goal of adding a compound-turbo setup and getting closer to 1,800-2,000 horsepower on fuel only. Diesel of the Week is sponsored by AMSOIL. If you have an engine you’d like to highlight in this series, please email Engine ...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 LB7Well, for starters, even in its best year, 2004, the LB7 Duramax can hardly compete with today’s modern diesels. They offer twice the horsepower, torque, and tow capacity of the original Duramax. It doesn’t have to stay that way though. The 15 LB7 Duramax performance upgrades listed below significantly improve the drivability and ...The 6.6-liter LB7 Duramax Engine is produced by DMAX, a joint venture between GM and Isuzu in Moraine, Ohio. The Duramax Engine was released in late 2001 into the Chevrolet and GMC chassis vehicles. The LB7 Duramax Engines were replacing the old 6.5-L Detroit built engine which was a big jump forward in technology.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 ...💪 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... GM 6.6L LB7 V-8 Duramax Turbo Diesel Engine Vehicle Applications; Year Make Model Transmission Power (hp / kW) @ RPM Torque (lb-ft / Nm) @ RPM; 2001-2003 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.The second Duramax engine, the LLY, first arrived on the market in mid-2004, with an increase in both power output (310 hp against the LB7’s 300) and torque (590 lb-ft against the LB7’s 520)..

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