Years of duramax

2006 to 2007 Duramax LBZ. 2006-2007 Duramax LBZ is among the best year generations certified by many owners. First of all, let’s say that all the generations are good, but for some features, 2006-2007 stands out among the competition. The 2006 to 2007 Duramax was a 6.6L turbo-diesel engine produced by General Motors.

Years of duramax. 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 ...

November 20, 2023 by Alex Jones. Duramax started using def in their diesel engines in 2011 for compliance with federal emissions regulations. Duramax implemented def to reduce nox emissions and meet stricter epa guidelines on diesel exhaust fluid emissions. Diesel engines are popular due to their long-lasting performance and fuel efficiency.

Basic Operation Principles. Not only was the CP3 used on the Duramax engines from 2001-2010, the Dodge Cummins has been using its common rail technology since 2003. The radial three piston design is gear driven off the engine. Obviously, its main purpose is to create high pressure for the fuel rail, which feeds fuel to the individual …1 post · Joined 2020. #1 · Oct 11, 2020. I am looking to buy a used 2500 Duramax to haul a 3 horse gooseneck trailer. The truck will also be my daily driver. What are the best …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.Well, the life expectancy of a Duramax 6.6 is around 2,00000 miles without any major repair. But it can last up to 4,00000 if properly maintained. So, the exact life expectancy of a Duramax depends on maintenance. Properly maintained and poorly maintained vehicles’ life expectancy is completely different.04-05 is the only direct bolt ins. An 01- early 03 can be used with adapter fittings for the cooler lines, valve body swap, and an internal harness swap (you just won't have the G solenoid functional since the 01-03 didn't have the ports and regulator for it), and a late 03 can also be used with the valve body and harness swap.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 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!”. 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 ...

Dec 12, 2023 · The best years for the Duramax are 2006 and 2007. These engines are both highly reliable and capable of a fantastic output. The only commonly stated problem with the 2006-2007 Duramax is that the pistons tend to crack when the engine runs higher than 600 horsepower. Duramax Diesel engine RPO codes include: LB7. VIN Digit: 1. Applications: 2001-Early 2004 Chevy Silverado and GMC Sierra, 2001-2005 Chevy Kodiak and GMC TopKick. Details: First version of the Duramax diesel. Known for fuel injectors leaking into the oil supply; see TSB #04039B.GMC/Chevy Duramax Diesel Tuners and Programmers. Show 12 24 36 48. Home Duramax. We carry diesel tuners for all Duramax truck models, including LB7, LLY, LBZ, LMM, LML/LGH, and L5P. We have a diesel programmer for all years of Duramax (2001 - 2020) Save. $80.Reaction score. 1,930. Location. Rocky View County, AB. Nov 25, 2015. #3. 01-02 = Early LB7 - These are the first generation of Duramax. They have known poor injectors which fail once or twice throughout the life of the engine. They sometimes blow head gaskets to combustion but its not a huge issue.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. …If you’re looking for an engine that won’t trouble you much, we recommend the following Duramax year models: 2010 – 2017 Duramax LGH; 2011 – 2016 Duramax …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.

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.Nov 30, 2023 ... ... Diesel Customs•8.2K views · 17:18 · Go to channel · What Is The Worst Year Duramax Ever Made? EXPLAINED! Truck Master•459K views · ...656 posts · Joined 2012. #9 · Dec 17, 2016. The LP5 is the 1st year that GM is making the motor totally in house vs the previous Izuzu diesel influence. One really positive thing is that the Bosch injection system is gone for 17 and the Denso system is in.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 ... To achieve 30 mpg with a Duramax, maintain proper tire inflation, avoid heavy payloads, and drive at consistent speeds. Regularly service your engine, use high-quality fuel, and follow the manufacturer’s recommended maintenance schedule. Utilizing aerodynamic accessories, such as bed covers, can also enhance fuel efficiency.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⋅ ...

El paso electric outage map.

Jan 26, 2022 ... ... :25 Under The Truck 14:29 Ending. 2001-2007 Duramax LB7/LLY/LBZ Buyers Guide. 34K views · 2 years ago ...more. Dirty Diesel Customs. 4.67K.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 ...Jun 3, 2019 · 2001 was a huge year for GM lovers across the United States. Not only was 2001 the start of the Duramax engine, but also the famous Allison 1000 Transmission. This first Duramax engine mated with GM trucks was coined the LB7 Duramax. DMAX Ltd. Turns Out Number 2 Million. At the time of its release for ’17 model year Chevy Silverado and GMC Sierra HDs, the L5P Duramax belted out a class-leading 445hp, along with an impressive 910 lb-ft of torque at just 1,600 rpm. As a result, an unladen ¾-ton crew cab 4x4 could sprint from 0 to 60 mph in just over six seconds—not …And you stop noticing everyone you pass-checking you out as you drive by. H1 Duramax TurbodieselA 2-inch body lift was required to fit the Isuzu/GM-designed 6.6L Duramax where the original 6.2/6 ...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 ...

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.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?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.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. 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. 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 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 ...The VIN number can always be found on your vehicle's title or registration card. It is important to know which engine you have because not all components are interchangeable between the various versions of Duramax engines. Duramax VIN Chart. Model Year(s) 8th Digit of VIN Code Duramax Models & Notes 2001 - 20041 2 • LB7 • LLY (introduced ...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...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 ...

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?

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 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 …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.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. The first Duramax diesel engines were used in '01-model year heavy-duty pickup trucks. The turbo-diesel V-8s displaced 6.6 liters and produced 300 horsepower and 520 pound-feet of torque.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.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 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 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 …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.

Cmha go section 8.

Stop and shop supermarket weekly circular.

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 - …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.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 …Jan 23, 2022 · 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 from ... 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 ... 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.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 Duramax block and heads are supplied from reliable vendors of General Motors. [vague] This engine was initially installed in 2001 Chevrolet and GMC trucks, and has …Oct 11, 2020 · Those are priced pretty high, though, in my opinion, for a 14 year old truck. All depends on what you're willing/ capable of spending. Having had 3 duramaxes, LLY, LMM and now, L5P, I can honestly say that the l5p is definitely the superior of the 3. 2018 GMC l5p ccsb stone blue metallic. Mcgaughy's 2" drop shackles. 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. ….

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 ...Aaron Brown. Chevrolet has added a diesel engine option to its revamped full-size Tahoe and Suburban SUVs for 2021. Available on every trim save for the off-road focused Z71, the 3.0-liter Duramax ...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 …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...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 ...The Duramax LLY engine lasts for around 200000 miles or 321869 kilometers without needing any major maintenance or repairs. It has a 95% GM user rating. It means 95% of Duramax LLY engines last over 200000 miles without any major issues. However, the lifespan of an LLY Duramax depends on the maintenance of the engine as well as the …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. Years of duramax, #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 …, In terms of specs, the big changes are the peak power and torque figures, with the new 3.0L I6 LZ0 turbodiesel Duramax engine producing a maximum of 305 horsepower at 3,750 rpm and 495 pound-feet ..., 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., Our journey through the progression of Duramax diesel engines will examine how these engines have reshaped expectations and set new standards in the diesel domain since their debut in 2001. From the very first LB7 model to the latest advancements, Duramax engines have undergone significant transformations, each iteration pushing the boundaries ..., 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 …, And you stop noticing everyone you pass-checking you out as you drive by. H1 Duramax TurbodieselA 2-inch body lift was required to fit the Isuzu/GM-designed 6.6L Duramax where the original 6.2/6 ..., And you stop noticing everyone you pass-checking you out as you drive by. H1 Duramax TurbodieselA 2-inch body lift was required to fit the Isuzu/GM-designed 6.6L Duramax where the original 6.2/6 ..., 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 & …, 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 …, 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., 656 posts · Joined 2012. #9 · Dec 17, 2016. The LP5 is the 1st year that GM is making the motor totally in house vs the previous Izuzu diesel influence. One really positive thing is that the Bosch injection system is gone for 17 and the Denso system is in., Best Duramax years. The Duramax can be an excellent engine for your truck if you avoid the model years above and stick to its durable and reliable ones. Below, we …, 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 ..., 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., 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 ... , Chevrolet diesel trucks use the 6.6 liter Duramax engine, which is prone to intermittent fuel starvation, water pump failure, overheating, injector failure and injector harness cha..., 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..., Dec 12, 2023 · The best years for the Duramax are 2006 and 2007. These engines are both highly reliable and capable of a fantastic output. The only commonly stated problem with the 2006-2007 Duramax is that the pistons tend to crack when the engine runs higher than 600 horsepower. , Jun 3, 2019 · 2001 was a huge year for GM lovers across the United States. Not only was 2001 the start of the Duramax engine, but also the famous Allison 1000 Transmission. This first Duramax engine mated with GM trucks was coined the LB7 Duramax. , 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 LML Duramax is a reliable engine overall, there are a few years that have been known to have more problems than others. In this section, we’ll take a closer look at the 2011 and 2012 models and the issues that have been reported. 2011. The 2011 LML Duramax is one year that some owners have had issues with., The 2007 model year marked significant changes across the GM truck lineup. With the all-new Chevrolet Silverado and GMC Sierra 1500 (1/2-ton) models already introduced for 2007, the all-new Heavy-Duty version of the GM trucks were released roughly mid-model year (often referred to as a 2007.5). ... The Duramax LMM is a durable …, The first generation Duramax, the 6.6L LB7 engine, produced 235 horsepower and 500 lb-ft of torque. Over the years, these numbers have increased dramatically. In the latest iteration, the 6.6L Duramax offers 445 horsepower and 910 lb-ft of torque, which highlights the continuous improvement in power and performance., 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., 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 ..., History was made in January 2001 when General Motors introduced its first Duramax diesel engine for the 2002 model year Chevrolet Silverado and GMC Sierra heavy-duty trucks —a 6.6-liter V-8..., 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, …, GM 6.6L L5P V-8 Duramax Turbo Diesel Engine Vehicle Applications; Model Year Vehicle Transmission Power (hp / kW) @ RPM Torque (lb-ft / Nm) @ RPM; 2017 – 2023, Whichever was the last year before emissions crap. :woopass Proud Member of "the pup bros":woopass 2012 Chevy Silverado 2500 HD LT, CC/SB, 4x4, 6.6L Dmax LML w/Allison., 2006 to 2007 Duramax LBZ. 2006-2007 Duramax LBZ is among the best year generations certified by many owners. First of all, let’s say that all the generations are good, but for some features, 2006-2007 stands out among the competition. The 2006 to 2007 Duramax was a 6.6L turbo-diesel engine produced by General Motors., Now, 14 years after DMAX Ltd. was created, more than 1.5 million Duramax engines have been built. The original Duramax was a vast improvement over GM’s …, L5P Duramax, 2017-present Basically, GM took everything they learned over the last 15 years, threw out the old blueprints, and started with a clean sheet, and the resulting L5P is the most powerful Duramax ever, producing 445hp and 910 pounds of torque., 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.