2024 Years of duramax

What is the Best and Worst Year for the 6.6 Duramax? Worst years (2001-2009) 6.6 Duramax has a long production history. We recommend you avoid any vehicle fitted with a 2001 down to 2009 Duramax engine. For the 6.6 Duramax, the newer models are built with improved performance in mind. The first engine was the Duramax LB7 found in …. Fletcher couch

– Engineerine. Best & Worst Years Of Duramax Engine (Cars To Avoid!) Last Updated on January 18, 2024 by Abed Serhan. The Duramax engine has been one …4-Inch Exhaust System: $260. Nearly all of the exhaust systems available for the LBZ Duramax can also be used on the LB7 (’01-‘04), LLY (’04.5-‘05) and even the LMM (’07.5-‘10). Diamond Eye Performance ’s 4-inch diameter, downpipe-back, aluminized exhaust system (shown) is one of these systems. Depending on where you shop, it will ... 1. 2005 Duramax. The 2005 Duramax is one of the worst engines of the entire series. The thing that makes it fail the most is that it has a head gasket problem, which means that the head gasket fails and causes an excess of oil in the coolant. This can cause overheating problems, which will lead to more failures. Jan 9, 2023 ... 211K views · 1 year ago ...more. Pickup Truck ... 3.0 Duramax 120,000 Mile Review | Chevy 1500 ... 3.0 Duramax vs 5.3L EcoTec3 - Which is Better?With that said, the LMM was slightly more powerful than the LBZ, putting out an extra five horsepower and 10 ft/lbs. of torque. Like its predecessor, the LMM Duramax was a sturdy motor, responded well to modifications, and could handle up to 600 horsepower before things started to break.Fuel System Problems. Your Duramax relies on a clean and unobstructed fuel supply. Issues with the fuel filter, fuel line, or fuel injectors can cause reduced engine power. A faulty injector can disrupt the fuel mixture, and clogged fuel filters restrict fuel flow, both potentially leading to limp mode activation for protection.The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. Chances are, if you’re looking at this page, you’re well aware of the problem.Fuel System Problems. Your Duramax relies on a clean and unobstructed fuel supply. Issues with the fuel filter, fuel line, or fuel injectors can cause reduced engine power. A faulty injector can disrupt the fuel mixture, and clogged fuel filters restrict fuel flow, both potentially leading to limp mode activation for protection.Maintenance requirements (oil, filter changes) for a diesel engine are about the same as for gas-powered vehicles. Duramax engines are known for their reliability and come standard with a 5-year/60,000-mile limited warranty on 2.8L Turbo-Diesel engines, or a 5-year/100,000-mile limited warranty on 3.0L and 6.6L Turbo-Diesel engines.May 2, 2016 · Engine: 6.6L LLY Duramax V8 with Bosch common-rail injection system. Transmission (s): Allison 5-speed automatic, ZF-6 6-speed manual. Best Year (s): Any year — just be prepared for the possibility of replacing the head gaskets and facing overheating issues if you plan to tow heavy. Price Range: $10,000 to $19,000. 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.As previously stated, the first model year of Duramax was 2001 with the LB7 engine code. This model featured a 3.5″ exhaust system with a catalytic converter and a muffler. This basic system was utilized all the way through 2007 model years ending with the LBZ engine code. The factory exhaust is relatively adequate for engines producing …The Silverado 1500 Duramax even achieves better fuel economy than its little brother, the 2.8L Duramax I-4-powered Colorado (20/30 for two-wheel drive and 19/28 for the 4x4).The Duramax L5P was launched in 2017 and made an appearance in models like the 2017 GMC Sierra HD and the 2017 Chevrolet Silverado HD. Producing 445 hp and 910 lb-ft of torque, this was one of GM ...Dec 13, 2020 · 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. May 4, 2023 · The Duramax was a late-year arrival for the 2019 Chevy Silverado 1500 and GMC Sierra 1500 pickups, with the 2020 model year being the first full year of availability. It was matched to the GM ... With so many injector failures between 2001 and 2004, GM extended the injectors’ warranty from five years/100,000 miles to seven years/200,000 miles. This did not, however, remedy the problem. ... With more than 10 years of engine operation, the Duramax is a proven player in the mid-size diesel world. The engine design has always …The 6.6-liter LBZ Duramax V8 diesel engine was introduced midway through the 2006 model year, when it replaced the 6.6 liter LLY Duramax variant. As such, it powered Chevrolet Silverado Heavy-Duty ...Whether you’re after horsepower and torque, fuel economy, ride comfort or reliability, the Duramax-equipped rigs coming out of Detroit over the past decade and a half are tough to beat. What Others Are …The Duramax Is An Extremely Strong Engine . It is often the case that new engines produce a lot of power, but do not have internals strong enough to support that power for years of usage.Dissecting 6.6L Duramax Engines Whether you’re looking for fun or looking to win, the Duramax platform is certainly one to consider. ... “Then, when we build 800-1,000 hp, a year or two later, they’re back wanting to push 1,200-1,400 horsepower. For that reason, if we’re building for 1,000 hp, we’re building for 1,500 hp to be safe ...Worst Duramax Engine Model Years. 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.HP Potential: LLY. With the largest version of the factory Garrett GT3788VA turbocharger bolted to it, the LLY (found in ’04.5-’05.5 trucks) has arguably the most tune-only horsepower potential of any Duramax produced between 2001 and 2016. Thanks to its 62.6mm inducer compressor wheel and the tallest turbine vane height (15mm) of any ... As a result, a number of much-awaited models at the time featured the 6.6-liter LBZ Duramax, including the Chevrolet Kodiak, GMC TopKick, GMC Sierra, and the. Chevrolet Silverado, which has ... Feb 1, 2023 · Which Duramax years to avoid? There are great Duramax engine models out there for you to try; however, there are specific model years that you should avoid. Below, we give a rundown of these years to avoid. Duramax LB7: 2001-2004 model years. As the first Duramax model to be released, the LB7 is still very popular among diesel enthusiasts due ... Power and performance. According to Chevrolet, the 6.6-liter Duramax turbo diesel features eight cylinders with a displacement of 403 cubic inches and comes equipped with a turbocharger for added ...Sep 1, 2014 ... Active member ... 01-10 will physically go in an any year block. Balancer and flywheel have to be correct for that crank. Lb7 and LLY share the ...1. 2005 Duramax. The 2005 Duramax is one of the worst engines of the entire series. The thing that makes it fail the most is that it has a head gasket problem, which means that the head gasket fails and causes an excess of oil in the coolant. This can cause overheating problems, which will lead to more failures.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 ... Newer body style ones have a tone of emissions junk on them. This year is the best IMO. Jason. 2006 Silverado 2500HD LBZ CC SB. Exterior: Escalade Handles, Front windows tinted to match the rear, painted bumpers & mirrors, billet grille, 305/50/20 Cooper Zeons on BMF Novakanes Death Metal, Cognito Braces, Stainless Sleeves, …Mar 19, 2024 · 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. Everybody loves free things. And they're easier to find than you'd think! Here's a list of the top 50 free items you can get this year. What’s that you say? You like free things? W...So, what year did Duramax start using DEF? The first generation of Duramax engines that use diesel exhaust fluid is the LML. These engines entered production in 2011. since EPA made it compulsory ...#3 · Dec 13, 2020. 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 …After a number of years, GM aimed to make smaller Duramax diesel engines for its vehicles, which began with inline-four engines in displacements of 2.5L and 2.8L, though they discontinued these ...LMM 2007.5- 2010 Started DPF for emissions, all years before had EGR coolers and valves, with the exception of some LB7 engines. LML 2011 EGR, DPF, and DEF fluid emissions equipment. CP4 issues and issues with def fluid have been the most prodiminant issues, strong running engines and plenty of power from the factory.Maintenance requirements (oil, filter changes) for a diesel engine are about the same as for gas-powered vehicles. Duramax engines are known for their reliability and come standard with a 5-year/60,000-mile limited warranty on 2.8L Turbo-Diesel engines, or a 5-year/100,000-mile limited warranty on 3.0L and 6.6L Turbo-Diesel engines.Environmental Pollution Agency has made DEF or diesel fluid exhaust compulsory since 2010 in all diesel trucks. Duramax began to use the DEF system in 2011 to till now. Before then, Duramax didn’t use DEF technology in their diesel trucks. DEF reduces 90% NOx from the exhaust system and increases a diesel truck’s fuel efficiency and horsepower.Nov 29, 2018 · The RHG6 model turbocharger aboard the LB7 marked the only time a fixed geometry unit was used on a Duramax. Manufactured by IHI Turbo America, the RHG6 sported a 60.6mm (inducer) compressor wheel and a 68mm (exducer) turbine wheel, along with a wastegate. In factory form, the IHI charger sees a maximum peak boost of 22 to 24 psi. What is the Best and Worst Year for the 6.6 Duramax? Worst years (2001-2009) 6.6 Duramax has a long production history. We recommend you avoid any vehicle fitted with a 2001 down to 2009 Duramax engine. For the 6.6 Duramax, the newer models are built with improved performance in mind. The first engine was the Duramax LB7 found in …The U.S. Small Business Administration (SBA) honors four Resource Partners of the Year for their impact on local economic growth and assistance to entrepreneurs. The U.S. Small Bus...Apr 14, 2023 ... ... Duramax https://bnks.pw/oilcooler Shop 2020-2023 Duramax Parts https ... 696K views · 1 year ago #mechanicalengineering #diesel #engineering ...A little over 3 years after the initial concept, the LB7 Duramax diesel went into production. The resulting engine was a state-of-the-art 6.6L V8 with four-valves-per-cylinder. The LB7 put out a segment-best 300 hp and 520 lb-ft of torque. The LB7 Duramax was considered revolutionary at the time and utilized a turbocharger, intercooler, and ...Why are These Years Included In the List of Duramax Years to Avoid? 1. 2001 to 2004 Duramax LB7. Engine Type: 6.6-liter V8 with Four Cylinder Valves: The LB7 was extremely significant because it was the first iteration of the Duramax engine. It has four valves per cylinder and a 6.6-liter V8 engine. Moreover, it has an aluminum head …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.May 2, 2016 · Engine: 6.6L LLY Duramax V8 with Bosch common-rail injection system. Transmission (s): Allison 5-speed automatic, ZF-6 6-speed manual. Best Year (s): Any year — just be prepared for the possibility of replacing the head gaskets and facing overheating issues if you plan to tow heavy. Price Range: $10,000 to $19,000. Besides the V8, as of 2019, GM offers an inline six Duramax for the Silverado 1500 and other models. A Duramax engine lasts 250,000 miles or around 20 years on average, but with good maintenance, it can do over 400,000 miles easily. The best years for Duramax are 2006-2007 “LBZ,” and the latest, post 2017 “L5P”.6.6L LBZ Performance & Tuning Potential. In addition to coming out of the factory with more power than the 6.0L Powerstroke and the 5.9L Cummins, the 6.6L LBZ Duramax was one of the most tuneable as well. While the pistons are a concerning issue on these engines, you shouldn’t run into any issues until you’re trying to push serious power.Whatever its year or generation, every Duramax is a 6.6L V8 unit. Unlike Cummins or Ford, who altered key engine features such as displacement, cylinder head design or fuel injection throughout the years, GM has retained the same general layout from the beginning. The LB7 was the first Duramax engine, first introduced in year 2001. The 6.6L L5P Duramax was mated to the tried-and-true Allison 1000 six speed automatic transmission for 2017 to 2019 model years. For 2020, the GM-Allison 10L1000 ten speed automatic transmission became standard; although Allison transmissions was responsible for rigorously testing the transmission, it is a GM design and is assembled at GM's ... Feb 1, 2023 ... Duramax LLY: 2004.5-2006 model years · Injector harness chafing · Water pump failure · Glow plug failure · Fuel pressure relief valve &m...The inaugural Duramax, RPO code LB7, would bring the first aluminum cylinder heads to the diesel pickup segment, introduce the same market to common-rail …Duramax History, Lesson 2: LLY. Midway through the 2004 model year, GM released the second-generation Duramax, RPO code LLY. Although much of the LLY’s internals match what you’ll find in the LB7, this version of the 6.6L V8 brought an improved injector design, variable geometry turbocharging and cleaner emissions to the table.With so many injector failures between 2001 and 2004, GM extended the injectors’ warranty from five years/100,000 miles to seven years/200,000 miles. This did not, however, remedy the problem. ... With more than 10 years of engine operation, the Duramax is a proven player in the mid-size diesel world. The engine design has always … The Duramax engine has a history that runs deep. It has the following still to this day and continues to up expectations in terms of power and everything else. 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. Aug 19, 2008 ... What you say might be true. My '05 doesn't get the mileage I expected. Unloaded on the freeway will get maybe 18. Average for everything ...Piper One. 3756 posts · Joined 2021. #2 · Nov 21, 2023. 01 to 05, Allison 5 speed. 06 to 19 Allison 6 speed. These are 1000 series Allison designs. The 6 speed had a double overdrive (6th gear was .61). Stock power and proper fluid and they live well. 2020 up, Allison branded 10 speed.Piper One. 3756 posts · Joined 2021. #2 · Nov 21, 2023. 01 to 05, Allison 5 speed. 06 to 19 Allison 6 speed. These are 1000 series Allison designs. The 6 speed had a double overdrive (6th gear was .61). Stock power and proper fluid and they live well. 2020 up, Allison branded 10 speed.The good news is that if you’re searching in that model year range of 2006-2011, the only time you’ll run into a vehicle with a CP4.2 would specifically be a 2011 Chevrolet/GMC Duramax or 2011 Powerstroke, as that was the first year of the LML and 6.7 Powerstroke engines.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 …Introduced in 2001 as a joint venture between GM and Isuzu, the Duramax V-8 was the General's bid to one-up Ford and Chrysler's newest generation of powerful and efficient diesels....6.6L LBZ Performance & Tuning Potential. In addition to coming out of the factory with more power than the 6.0L Powerstroke and the 5.9L Cummins, the 6.6L LBZ Duramax was one of the most tuneable as well. While the pistons are a concerning issue on these engines, you shouldn’t run into any issues until you’re trying to push serious power.May 27, 2007 · The very best years to own are the 06-07 LBZ (Classic Body). The 07.5 is the new LMM new body style and has the DPF on it which robs fuel mileage. The LBZ has the most hp and torque only a catalytic converter in thye exhaust system that is easily done away with. The least problems are with the LBZ models. Feb 15, 2023 ... I bought an old Duramax! Now what? 18K views · 1 year ago ...more. Granger Smith. 762K. Subscribe. 1.2K. Share. Save.Mar 10, 2022 ... That ain't nothing, your truck will fall apart before the engine will. Unless you don't treat the truck right, you should easily see 300K miles ...Best Duramax Years . The Duramax engine is a diesel engine produced by General Motors. It was first introduced in the 2001 model year and has been used in a variety of GMC and Chevrolet trucks and SUVs since then. The Duramax is known for its high torque output and fuel efficiency, as well as its reliability. So, what are the best Duramax years?The 3-liter Duramax is an inline-6 engine that debuted in 2019 for the 2020 model year, and generated 277 horsepower with 460 pound-feet of torque.Feb 15, 2023 ... I bought an old Duramax! Now what? 18K views · 1 year ago ...more. Granger Smith. 762K. Subscribe. 1.2K. Share. Save.See All 64 Photos. The 6.6L Duramax L5P is an entirely new powerplant. The development of this fifth-generation V-8 is more of a rebirth than an evolution. Every single part, down to the nuts and ...6.6L LBZ Performance & Tuning Potential. In addition to coming out of the factory with more power than the 6.0L Powerstroke and the 5.9L Cummins, the 6.6L LBZ Duramax was one of the most tuneable as well. While the pistons are a concerning issue on these engines, you shouldn’t run into any issues until you’re trying to push serious power.Jul 6, 2021 · 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 History of Duramax engines. Whatever its year or generation, every Duramax is a 6.6L V8 unit. Unlike Cummins or Ford, who altered key engine features such as displacement, cylinder head design or fuel injection throughout the years, GM has retained the same general layout from the beginning.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.A charge-off on your credit report means the original creditor has given up on trying to collect the debt and is going to write it off as a loss. However, that does not mean you ar...Once the OBS was discontinued, the Silverado truck took over in 1999. However, the Cateye didn’t get released until a few years later. Looking at similarities, both of these Chevy models are considered quite dependable. The fact that the C/K Series was produced for ten years proves that it was reliable and popular.The Duramax years to avoid are LB7 from 2001 to 2004, LLY from 2004 to 2006, LBZ from 2005 to 2006, LMM from 2007 to 2010, and the LML from 2011 to 2016. These are the Duramax engine years that have been most troublesome. “Drive Past Myths: Get the Real Deal on Car Buying!”.The RHG6 model turbocharger aboard the LB7 marked the only time a fixed geometry unit was used on a Duramax. Manufactured by IHI Turbo America, the RHG6 sported a 60.6mm (inducer) compressor wheel and a 68mm (exducer) turbine wheel, along with a wastegate. In factory form, the IHI charger sees a maximum peak boost of 22 to 24 psi.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...

May 27, 2022 · The LML Duramax, introduced for the 2011 model year was a powerhouse. Coming out of the gate with 397hp and 765 lb/ft of torque, this Duramax diesel featured an advanced fuel injector design and increased line pressure to 30,000 psi compared to 26,000 on the LMM. . Apex moses lake wa

The 2001 – 2004 Duramax LB7 and 2004.5 – 2005 Duramax LLY are the years with the most problems. So, the years that are affected by these problems should be avoided. …In conclusion, the Duramax engine has been a reliable and powerful option for diesel truck enthusiasts for over two decades. The best years for the Duramax engine are generally considered to be the 2010-2017 Duramax LGH, 2011-2016 Duramax LML, and the 2011-present Duramax XLD25. These years offer a good balance of power, reliability, and fuel ...The Duramax years to avoid are LB7 from 2001 to 2004, LLY from 2004 to 2006, LBZ from 2005 to 2006, LMM from 2007 to 2010, and the LML from 2011 to 2016. These are the …Dec 17, 2020 · 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 max tow capacity a ... I decided to buy a new 'compact' pickup and ultimately settled on the Colorado with the diesel. As I was looking into the engine, I came to realize I have a distant history with the GM 2.8L. I'm an engineer, and I've been developing diesel engines at the same company for more than two decades now. Back in 2000, my company owned VM …Aug 19, 2008 ... What you say might be true. My '05 doesn't get the mileage I expected. Unloaded on the freeway will get maybe 18. Average for everything ...The next few generations of the Duramax delivered solid upgrades to the design. Most companies would have made these running changes, but GM identified each revision as a different model. The next revision, referred to as the LLY, was a mid-year change in 2004. The easiest way to tell whether the engine is an LB7 or an LLY is by the valve covers.December 17th, 2020. 6.6L L5P Duramax Specs, Tow Ratings, And Model Year Changes. 6.6L L5P Duramax Specifications, Information, and Resources! 2017+ Chevy HD & …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.The L5P Duramax engine stands as a pinnacle of diesel engineering, offering robust performance and efficiency. However, for enthusiasts seeking even greater power and enhanced efficiency, tuning and delete kits present an appealing option. This article delves into the world of L5P Duramax tuning and delete kits, exploring the benefits, …The RHG6 model turbocharger aboard the LB7 marked the only time a fixed geometry unit was used on a Duramax. Manufactured by IHI Turbo America, the RHG6 sported a 60.6mm (inducer) compressor wheel and a 68mm (exducer) turbine wheel, along with a wastegate. In factory form, the IHI charger sees a maximum peak boost of 22 to 24 psi.The Duramax L5P was launched in 2017 and made an appearance in models like the 2017 GMC Sierra HD and the 2017 Chevrolet Silverado HD. Producing 445 hp and 910 lb-ft of torque, this was one of GM ...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....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...Ah, New Year's resolutions. They're easy to start, but hard to stick to. Here are 11 tips to help you hit your goals all-year long. Setting New Year resolutions can help you achiev...This 2005 Silverado HD looks plenty sharp. In total, there are still around 1 million GMT-800 trucks still in service. Introduced in 2001 on GM HD trucks, a Duramax FICM easily functioned for 10-15 years without fail. Now twenty-plus years old, it's common for the FICM in 2001-2005 Duramax-powered GM trucks to retire unexpectedly.Going to Mars for a year requires that you take a substantial amount of food and water with you. Find out how much you need to take if you're living on Mars. Advertisement Another ...Duramax Engines Through the Ages. Several Duramax engines were produced throughout the years to comply with ever-shifting EPA emissions standards. First up is the LB7, which first saw the light of day in 2001. Duramax LB7. Source: Truck Trend. The LB7 was the first Duramax engine and was made from 2001–2004.Besides the V8, as of 2019, GM offers an inline six Duramax for the Silverado 1500 and other models. A Duramax engine lasts 250,000 miles or around 20 years on average, but with good maintenance, it can do over 400,000 miles easily. The best years for Duramax are 2006-2007 “LBZ,” and the latest, post 2017 “L5P”.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..

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