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...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. 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.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...The years to avoid Duramax engines are 2001, 2002, and 2004 due to injector and turbocharger problems. These years have shown higher rates of engine failures and costly repairs. Duramax engines are known for …Jan 1, 2010 ... What years and options were offered for Duramax vans? · 2015 Camaro ZL1 · 2001 GMC Sierra 2500HD · 1996 Chevy Silverado 2500HD · 1987 GM...What year of Duramax did this come out of? (Intank module) UPDATED I'm new to the diesel world and getting a crash course on it. I've picked up fuel tank with the intank fuel module and need to know what year or year ranges it fits in. Any help on this would help me greatly! Thanks in advance.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.The joint venture (and resulting engine) was known as Duramax, and the LB7 was the first of many models to come. It’s a 6.6-liter, common-rail injected, 32-valve, V8 turbodiesel which put out 235hp and 500 pounds of torque in its first year, and for the final year of ‘04 the LB7’s output had grown to 300hp and 520 pounds of torque. When ...Payroll compliance requires all sizes of businesses. Here are 12 things to know to keep your business on the right side of payroll compliance in the coming year. Payroll compliance...Dec 19, 2022 ... ... years of real world experience is seems to hold up very well. The next ... What Is The Worst Year Duramax Ever Made? EXPLAINED! Truck Master ...To buy a Duramax engine, you must know which years should be avoided. Avoid these 4 models of Duramax. 2001 to 2004 Duramax LB7; 2004 to 2005 Duramax LLY; 2006 to 2007 Duramax LBZ; 2007 to 2012 Duramax LMM; All these engines have minor issues. Now we discuss these models and their problems in detail. 2001-2004 …Duramax Years with Known Issues. 2001-2004 LB7 Duramax Engine. The LB7 Duramax engine, manufactured from 2001 to 2004, is known for its fair share of problems that owners may encounter. One of the most with this engine is injector failure. Over time, the fuel injectors can develop internal cracks, leading to fuel leaks and poor …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.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 ...I’ve compiled many reports from various forums and blogs. According to them, I recommend avoiding the following Duramax year models: 2001 – 2004 Duramax LB7. 2004.5 – 2005 Duramax LLY. 2006 – 2007 Duramax LBZ. 2008 – 2010 Duramax LMM. 2007 – 2012 Duramax LML. These specific engine models have received a lot of complaints.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 ... Discover the evolution and unique features of Duramax engines, from the pioneering LB7 to the cutting-edge L5P. Understand key differences and make an informed decision for your truck's diesel engine needs. ... and innovation, Duramax engines have been a staple in the automotive industry for years. Fast forward to the present day, 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 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!”.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 ...The LB7 was introduced in 2001 and used until early 2004 before it was replaced with the LLY Duramax. What Year of LB7 is the Best? Although all years of the LB7 potentially had a few issues, including problems with the head gasket, the LB7 Duramax injectors, and the fuel filter housing o-rings, the LB7 is generally considered a reliable engine ...Feb 26, 2014 · 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. The Duramax’s greatest years are 2006 and 2007. These engines are both dependable and capable of producing a great deal of power. The only issue with the Duramax from 2006 to 2007 is that the pistons crack when the engine is driven at more than 600 horsepower.In this article, we’ll take a deep dive into the different types of Duramax engines, their evolution over the years, and how to choose the right one for your needs. Understanding Duramax Engines Before we dive into the specific models, let’s first take a moment to understand what Duramax engines are all about.2006-2007 LBZ has the problems from previous generations fixed, and now the weak link is pistons. These also have 6 speed transmissions instead of the 5 speeds. 2007.5-2010 LMM has the DPF system but is otherwise the same as the 2006-2007 LBZ. 2011-2016 LML has DPF and DEF. Changed the injection pump from a CP3 to a CP4.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”.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 joint venture (and resulting engine) was known as Duramax, and the LB7 was the first of many models to come. It’s a 6.6-liter, common-rail injected, 32-valve, V8 turbodiesel which put out 235hp and 500 pounds of torque in its first year, and for the final year of ‘04 the LB7’s output had grown to 300hp and 520 pounds of torque. When ...At the low end of the market, the Cateye is likely to cost at least $10,000. Going for later model years or higher trims will get you closer to $15,000. If you opt for the Duramax version, plus a later model year and a higher trim, you could easily be paying at least $25,000. Aftermarket SupportThe 2021 and 2022 Colorado model years are great picks and are the most reliable options from the second generation. For 2021 the Colorado received an updated front-end design, a stamped Chevrolet logo across the tailgate, and some minor standard and optional equipment shuffling. It carried over to 2022 unchanged.Discover the evolution and unique features of Duramax engines, from the pioneering LB7 to the cutting-edge L5P. Understand key differences and make an informed decision for your truck's diesel engine needs. ... and innovation, Duramax engines have been a staple in the automotive industry for years. Fast forward to the present day, and …Fifth Generation Sierra 2500HD Production Years: 2024 GMC Sierra 2500HD Review. TRIM ENGINE TRANSMISSION DRIVETRAIN GMTT1XX Pro 6.6L Turbo V8 Diesel 6.6L V8 Gas 10-Speed Automatic ...2005 Chevrolet Silverado 2500HD LT3, 6.6 Duramax LLY, 95k miles, EFI Live Idaho Rob, 4in Silverline Turbo Back, AFE Stage 2 Intake, 6in Fabtech, 35 Mickey Thompson ATZ tires on 17 ProComp rims, fully debadged, 10sub 800watts.Chevrolet Silverado 2500 HD LTZ Crew Cab Pickup. The LML Duramax shocked its rivals when it was revealed, offering 397 horsepower and 765 lb-ft of torque while simultaneously lowering emissions and improving fuel economy. A new, improved engine block casting was used. GM increased oil film thickness by changing the main …To build this powerful workhorse, GM partnered with Japanese auto manufacturer Isuzu, and the result was the legendary Duramax V8, which has retained its basic architecture for more than 20 years now.The CP4 is a high-pressure fuel pump, or injection pump, that debuted in 2011 in the Ford Powerstroke and GM Duramax engines. The CP4 was an updated model to the incredibly reliable and well-regarded CP3 pump. Unfortunately, the CP4 has long been plagued by failures, warranty claims, and expensive repair bills, even leading to a class …#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 …The Duramax’s greatest years are 2006 and 2007. These engines are both dependable and capable of producing a great deal of power. The only issue with the Duramax from 2006 to 2007 is that the pistons crack when the engine is driven at more than 600 horsepower.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.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 ...When we're young, it's hard to even imagine ourselves in our "golden" years, perhaps needing help with everyday activities. But the fact is, Americans are living longer now; and th...Here are a few top places that hire 14 and 15 year olds as employees, plus a few other money-making ideas! Start making money this month. Home Make Money Looking for places that h...The horsepower of a 6.6 Duramax varies depending on the model year and specific engine configuration. For example, the 2023 GMC Sierra 2500HD with the Duramax 6.6L Turbo-Diesel V8 engine has a horsepower rating of 445 hp @ 2,800 rpm. However, older models may have lower horsepower ratings.How much does a Cateye Duramax cost? You will have to pay around $10000 for Silverado 1500, and it can go up to $15000 if you prefer later model years and higher trims. The price might rise well above $25,000 if you have your heart set on the diesel model. Bottom line. Cateye Duramax is one of the Silverado models with huge demand.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 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.2011 – 2016 Duramax LML. 2011 – present Duramax XLD25. 2012 – present Duramax XLD28. 2014 – present Duramax LWN. 2017 – present Duramax L5P. 2019 – present Duramax LM2. Duramax Engine Year …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.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.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 ...Here are seven business resolutions you can make and keep in 2022 that will help you build a solid and successful company. What are your business goals for the new year? If I’ve le...Apr 22, 2009 · 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, Train Horns. 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.Dark Mode; Light Mode; menu Log inThe LB7 was introduced in 2001 and used until early 2004 before it was replaced with the LLY Duramax. What Year of LB7 is the Best? Although all years of the LB7 potentially had a few issues, including problems with the head gasket, the LB7 Duramax injectors, and the fuel filter housing o-rings, the LB7 is generally considered a …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. This pump became an integral component of this high-performance, heavy-duty truck model for these years. Another vehicle that sported the CP4 pump was the GMC Sierra HD. Similar to the Silverado, models from the years 2011-2016 running on the 6.6L Duramax diesel engine featured the CP4 pump.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 ...Finally, the LBZ is the last generation of Duramax without emissions control parts, which gives it superior reliability. For those reasons, the LBZ is our choice for the best Duramax engine. Rely on ProSource Diesel for all your Duramax aftermarket parts needs, including L5P upgrades, LML Duramax parts, LMM Duramax upgrades, LBZ Duramax ...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.The Duramax will get you an addition 4 MPG for highway driving, which means you will need to do a substantial amount of highway driving to recoup the $10,000 cost. Reducing it down to simple math, let’s assume that you drive 10,000 highway miles a year and that gas costs $3.00/gallon. The Duramax will require approximately 333.33 …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 ... 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. 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... 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 ... 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 ...2006-2007 LBZ has the problems from previous generations fixed, and now the weak link is pistons. These also have 6 speed transmissions instead of the 5 speeds. 2007.5-2010 LMM has the DPF system but is otherwise the same as the 2006-2007 LBZ. 2011-2016 LML has DPF and DEF. Changed the injection pump from a CP3 to a CP4.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.While most known Duramax problems affect specific model years, the faulty fuel system is an issue that plagues all model years. It usually starts with difficulty starting the vehicle and then transits to excessive smoke, poor fuel economy, lower RPMs, loss of engine power, and excessive noise. While there are several fuel system problems out ...Written By: L.T. Tolman. We’re in the middle of a three-part journey which takes a deep dive into the most popular late model diesel powerplants used in pickup trucks, and todays subject will be the various …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...The Duramax engine has been one of the most popular diesel engines in the US for over two decades. Duramax is a heavy-duty V8 diesel engine co-developed by GM and Isuzu. It was introduced in 2001 as the upgrade for the 6.2L and 6.5L Detroit engines. It turned out to be a competent and powerful competitor in the light diesel market. The engine has undergone various improvements over the years ...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.rynburns. • 8 yr. ago. The LBZ is the best Duramax chevy ever built. Non invasive emissions equipment, easier to work on (for the most part) and easily an acceptable ammount of power. I would only change a couple things if I had one; the stupid fan shroud thing that bolts to the heads/block would go for sure, it makes life a pain in the ass ...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.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 …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 ... Dark Mode; Light Mode; menu Log inThe 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...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 GM Duramax 3.0L I-6 LZ0 is a turbo-diesel engine produced by General Motors for use in various vehicles, primarily full-size half-ton pickup trucks and full-size SUVs. ... 2023 model year ...Oct 3, 2023 · In conclusion, the Duramax engine is reliable and durable overall, but certain years offer more reliable performance than others. The best years are 2001-2004, 2006-2007, and 2011-2016, while the worst are 2005, 2008-2010, and 2017-2020. It is recommended to avoid cars with these engines, if possible, to get the most reliable performance. The joint venture (and resulting engine) was known as Duramax, and the LB7 was the first of many models to come. It’s a 6.6-liter, common-rail injected, 32-valve, V8 turbodiesel which put out 235hp and 500 pounds of torque in its first year, and for the final year of ‘04 the LB7’s output had grown to 300hp and 520 pounds of torque. When ... 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!”. PowerStrokes came around in 1994, and Cummins' first purpose-built automotive diesel engine debuted all the way back in 1932, and has been affiliated with …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 ...
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 .... Wegmans labor day hours
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 ...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.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 ...The best years for the duramax were 2011-2016 while the worst years were 2001-2004. During this time, the duramax was plagued with injector and fuel system issues. The duramax engine is a popular choice among truck owners due to its power and reliability. However, not all years of production can be deemed equal.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.As a result, you have to be careful while buying some Duramax models from the undermentioned years. The following are the years and their problems: LB7 Duramax (2001-04) LB7 Duramax was the first generation of the V8 Duramax engine and it did quite well. It was reliable and gave quite a raw feel like the one that diesel enthusiasts crave …Meet the Experts. < Previous | Next >. Code 2200 plus saying speed limited to 65 in175 miles. But cleared with tester and back now. 2013 chev duramax 6.6 - … I’ve compiled many reports from various forums and blogs. According to them, I recommend avoiding the following Duramax year models: 2001 – 2004 Duramax LB7. 2004.5 – 2005 Duramax LLY. 2006 – 2007 Duramax LBZ. 2008 – 2010 Duramax LMM. 2007 – 2012 Duramax LML. These specific engine models have received a lot of complaints. 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.Here are the years of Duramax engines to avoid: 2001 to 2004 LB7. 2004 to 2005 LLY. 2006 to 2007 LBZ. 2007 to 2012 LMM. 2007 to 2016 LML. These engines are prone to numerous problems, including issues with the fuel lift pump, water pump, fuel injector, piston, and fuel pressure lift pump. Read on to learn more about the Duramax years to …6.6L LB7 Duramax Specifications Chart. Manufactured Years: 2001-2004. Engine Design: 6.6L 90-Degree V8 Turbocharged Diesel. Transmission: 5-Speed Auto Allison Transmission. Vin Identification: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..