Lb7 duramax years

Fasteners. Just like the small-block world, ARP is the go-to fastener in any Duramax build. From rod bolts to main studs to the Custom Age 625+ head studs pictured, ARP is deeply involved in the Duramax and the diesel engine industry as a whole. A set of Custom Age studs are always on order when 100 psi (or more) of boost will be sent …

Duramax LB7 Reliability. The LB7 is a great engine, when it is stock. The block and internals are plenty capable of lasting 350,000+ miles. ... I’ve done that about 4 times in the last year and a half. Mechanics have done pressure test done twice to try and find the leak, but tests fine. Reply. Harold Lovesee says: January 10, 2021 at 9:47 am.December 5, 2018. Story By. Mike McGlothlin. Midway through the 2004 model year, GM released the second-generation Duramax, RPO code LLY. Although much of the LLY’s …12 posts · Joined 2008. #8 · Sep 27, 2008. LB7 Engine life continued. Symptom; a very small loss of coolant, no power loss and no real measurable loss of coolant. 3 diesel mechanics with a total of 70 years experience between them, 2 with 15 years on the GM 6.2, 6.5, LB7, LLY, LBZ, LMM engines.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.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 ...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 …

Dec 12, 2023 · Let’s take a look at the highlights of other powerplants within the Duramax family that are reliable. LB7 2001-2003. This engine is getting to be pretty old now, but it is still powerful and reliable. So, it’s a good candidate for what are the best years for the Duramax. Because of its age, it’s probably the cheapest Duramax engine around. 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 ...Mar 7, 2023 · The alternator (with a ~180 degree belt wrap) sitting 1/4" higher dictates that the tensioner (also with a ~180 degree wrap) must swing about 1/4" further out. With the tensioner arm length at around 3.5", that only comes out to about 4 degrees. With an easy 30+ degrees left in the tensioner, it's a non-issue. At the core of the K15’s transformation is the formidable ‘03 LB7 Duramax engine, which is more than capable of robust performance. Stingel’s LB7 makes a cool 1,300 horsepower at 4,000 rpm and an impressive 1,900 lb.-ft. of torque at 3,400 rpm. Wyatt’s expertise and commitment to pushing the boundaries of diesel power are evident in the ...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.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.

Duramax Lb7 Weird valve lash. So i recently pulled my engine apart to change injectors, and now im adjusting my valves, because might aswell. I adjusted the valves to 0.12 as recommended, then spun the engine around a couple of times and rechecking all my adjustments. I noticed alot of the valves were now 0.16 or more, some …The LBZ Duramax is a 6.6-liter V8 diesel engine produced by GM for two model years, 2006 and 2007. It is an upgrade to the previous LLY engine. The LBZ Duramax has a maximum power output of 360 horsepower and 650 lb-ft of torque at 1600rpm. It is highly reliable and durable, with many owners reporting trouble-free operation for hundreds of ...The result is a Camaro with an LB7 Duramax fit snuggly under the factory hood, which surprisingly, doesn’t look out of place. In fact, the hefty engine fits the mold just fine. The motor itself is Wagler’s Streetfighter Duramax platform , that comes assembled with a Callies billet crank, MAHLE pistons, narrowed Wagler rods to fit the crank ...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.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.

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Duramax Horsepower & Torque Figures by Model Year. Model Year (s) Horsepower. Torque. RPO Code. 2001 - 2002. 300 hp @ 3,100 rpm. 520 lb-ft @ 1,800 rpm. LB7.Jan 14, 2016 ... Here's a vin decoder for you. Model Year(s) 8th Digit of VIN Duramax Model & Notes 2001 – 2004 1 LB7 2 LLY (introduced midyear 2004) 2005 2 ...83 posts · Joined 2013. #15 · Jan 31, 2013. Yeah my 6.0 had custom tuning. But it looks like merchant automotive has some good stuff for my truck including a pump upgrade kit for the t-case. 2003 Chevy 2500HD Regular cab, 4x4, LB7, Allison, 5in Straight pipe DP back, 6in Black Chrome tip, PPE Boost valve, 6k HID lows 159k Miles SOLD. …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 ...

The Instagram that got away. Despite the general consensus that Twitter is a fun place to find news, make news, and otherwise keep up with the world in real time, investors have la...Jan 1, 2019 · LB7: The O.G. It doesn’t get any simpler than the original 6.6L: the LB7. With the exception of California models, the first Duramax was effectively free of any of the problematic emissions control devices that would be introduced in the years to come. Mar 7, 2023 · The alternator (with a ~180 degree belt wrap) sitting 1/4" higher dictates that the tensioner (also with a ~180 degree wrap) must swing about 1/4" further out. With the tensioner arm length at around 3.5", that only comes out to about 4 degrees. With an easy 30+ degrees left in the tensioner, it's a non-issue. 884 posts · Joined 2009. #3 · Dec 6, 2009. If the filter change doesn't work, it could be a low fuel rail pressure. I just went through that. When the engine was under load, it would go into limp mode and throw a "fuel leak -large" code. It was my injector pump not supplying enough pressure to the fuel rail.GM issued a warranty for this and currently injectors and warrantied for 7 years/200,000 miles. Out of all the Duramaxes the Lb7 is considered to attain the best fuel mileage, helped in part to not having any emissions requirements. The Duramax was on the Ward's 10 Best Engines list in 2001 and 2002. The following trucks use the LB7: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 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.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...Jan 1, 2019 · LB7: The O.G. It doesn’t get any simpler than the original 6.6L: the LB7. With the exception of California models, the first Duramax was effectively free of any of the problematic emissions control devices that would be introduced in the years to come. SKU: DURAMAXLB7LB. GM 6.6L Duramax LB7 Remanufacture Long block Engine. Our Price: $5,195.00. We stand behind our unbeatable quality with a One year unlimited mileage warranty! - available on most engines. REMAN LONG BLOCK: Includes Block & Cylinder Heads, Cam/Main/Rod Bearings, Camshaft, Connecting Rods, Gaskets, Lifters, Piston …The LB7 Duramax was incredibly impressive for its time. Over the years, we’ve found out just how reliable and capable the trucks are. That doesn’t mean they are flawless though. By following GM’s recommended LB7 Duramax Maintenance schedule and service intervals you can drastically reduce the amounts of problems you will encounter.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.

Because multiple versions of the Duramax were available in some years, knowing the engine code of your Chevy Silverado or GMC Sierra will make it much easier to ensure you get the correct parts the first time. ... LB7. VIN Digit: 1. Applications: 2001-Early 2004 Chevy Silverado and GMC Sierra, 2001-2005 Chevy Kodiak and GMC TopKick. …

Sep 14, 2022 · The result is a Camaro with an LB7 Duramax fit snuggly under the factory hood, which surprisingly, doesn’t look out of place. In fact, the hefty engine fits the mold just fine. The motor itself is Wagler’s Streetfighter Duramax platform , that comes assembled with a Callies billet crank, MAHLE pistons, narrowed Wagler rods to fit the crank ... Mar 7, 2023 · The alternator (with a ~180 degree belt wrap) sitting 1/4" higher dictates that the tensioner (also with a ~180 degree wrap) must swing about 1/4" further out. With the tensioner arm length at around 3.5", that only comes out to about 4 degrees. With an easy 30+ degrees left in the tensioner, it's a non-issue. Fasteners. Just like the small-block world, ARP is the go-to fastener in any Duramax build. From rod bolts to main studs to the Custom Age 625+ head studs pictured, ARP is deeply involved in the Duramax and the diesel engine industry as a whole. A set of Custom Age studs are always on order when 100 psi (or more) of boost will be sent …Feb 1, 2023 · 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. 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 …83 posts · Joined 2013. #15 · Jan 31, 2013. Yeah my 6.0 had custom tuning. But it looks like merchant automotive has some good stuff for my truck including a pump upgrade kit for the t-case. 2003 Chevy 2500HD Regular cab, 4x4, LB7, Allison, 5in Straight pipe DP back, 6in Black Chrome tip, PPE Boost valve, 6k HID lows 159k Miles SOLD. …Description. 2001-2004 LB7 Duramax S400/Stock Compound Turbo Kit. 1000 RWHP capable depending upon turbo and fuel system modifications. Recommended for daily driver work trucks and tow rigs looking for increased horsepower, better fuel mileage, and superior EGT control with stock-like turbo spool characteristics. Recommended Combinations:

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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. 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.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 ...The first engine was installed in 2001 in Chevrolet and GMC trucks. 23 years after the project was first conceived millions of vehicles now have the engine installed. A Brief History of the DURAMAX Diesel Engine 2001-2003 LB7. The first DURAMAX diesel engine, code LB7 debuted in 2000 For the 2001 model year.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 …The Duramax LB7 is a 6.6L V-8 with four valves per cylinder, a cast-iron engine block with aluminum heads, and high-pressure common-rail injection. It produced …Here is our guide to the 7 most common 6.6L LB7 Duramax problems and how to fix them. 1. LB7 Duramax Injectors. The most notorious LB7 Duramax problem is their original injectors. Even GM …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.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.As 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...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.Lb7 injector issue. Hey guys, new here to this forum and was looking for a little assistance. I have 2004 lb7 duramax with 269k miles, replaced the factory injectors last week with remanufactured Bosch injectors and truck drove and ran amazing until this morning, pulled into work and truck sounded like it had a fuel knock. ….

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.The Duramax LB7 is a 6.6L V-8 with four valves per cylinder, a cast-iron engine block with aluminum heads, and high-pressure common-rail injection. It produced …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.Here is our guide to the 7 most common 6.6L LB7 Duramax problems and how to fix them. 1. LB7 Duramax Injectors. The most notorious LB7 Duramax problem is their original injectors. Even GM …Oct 6, 2019 ... 44K views · 4 years ago ...more. DG's Pro Tech. 11.3K ... What Is The Worst Year Duramax Ever Made? ... REVIEW: Everything Wrong With A 6.6 Duramax ...Description. 2001-2010 LB7/LLY/LBZ/LMM Duramax Heavy Duty Engine Mounts developed and tested for use on high horsepower application to reduce engine flex in the chassis and broken OEM engine mounts. These high performance Duramax motor mounts have been designed to maintain the alignment features of OEM mounts while adding significant …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. Dec 22, 2021 ... ... duramax #LB7 #GeneralMotors. Is an LB7 Worth it!? 117K views · 2 years ago #duramax #GeneralMotors #LB7 ...more. Custom Offsets. 708K.This newly formulated Custom Age 625+ super-alloy demonstrates superior fatigue cycle life, tensile strength and toughness – with complete resistance to atmospheric corrosion and oxidation making it best suited to extreme, high horsepower competition builds on LB7/LLY/LBZ/LMM/LML Duramax 6.6L engines manufactured from 2001-2016. Lb7 duramax years, 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., Jan 14, 2016 ... Here's a vin decoder for you. Model Year(s) 8th Digit of VIN Duramax Model & Notes 2001 – 2004 1 LB7 2 LLY (introduced midyear 2004) 2005 2 ..., 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 rods, 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 ..., Because multiple versions of the Duramax were available in some years, knowing the engine code of your Chevy Silverado or GMC Sierra will make it much easier to ensure you get the correct parts the first time. ... LB7. VIN Digit: 1. Applications: 2001-Early 2004 Chevy Silverado and GMC Sierra, 2001-2005 Chevy Kodiak and GMC TopKick. …, Sep 4, 2014 ... Dealer says its the mid year 2007.5 model having the newer LMM engine setup. They place we got the engine send us the Long Block labeled LB7. I ..., Sep 3, 2010 · 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. , 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 …, What Years Fall Under 6.6L Duramax LB7? In 2001, General Motors discontinued their 6.5L Detroit engine, replacing it with the 6.6L LB7 Duramax engine. The Duramax was a much-needed update: it introduced the new common-rail direct fuel injection system. This improvement decreased emissions, and it improved the engine’s …, 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. , It’s been 10 years since GM stopped producing the LB7 Duramax, but thanks to their longevity, efficiency and performance potential, the 2001-2004 GM trucks are still some of the most sought after light duty diesels on the road today. It may be getting hard to come across super clean low mileage LB7 trucks, but even at higher mileage …, Duramax Horsepower & Torque Figures by Model Year. Model Year (s) Horsepower. Torque. RPO Code. 2001 - 2002. 300 hp @ 3,100 rpm. 520 lb-ft @ 1,800 rpm. LB7., 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 ..., 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., The 6.6L Duramax, running complete engine includes the block, heads, front cover, oil pump & pan, oil filter, oil cooler, damper, water pump, valve covers, Glow plugs, flywheel housing, thermostat, thermostat housing, water outlet, intake manifold, common rail system with injectors, injector drive module, turbo & exhaust manifolds, fuel filter, plus the …, Feb 1, 2023 · 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. , As the end of the year approaches, you may be coming to the realization that, once again, you did not keep a single resolution past January 9th-ish. Or you can’t even remember what..., 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 …, Here is our guide to the 7 most common 6.6L LB7 Duramax problems and how to fix them. 1. LB7 Duramax Injectors. The most notorious LB7 Duramax problem is their original injectors. Even GM acknowledged their problems when they corrected the original injector design and issued a 200,000 or 7-year warranty on the updated model., 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 ..., 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..., Diesel of the Week. 1,400-Horsepower Turbocharged LB7 Duramax. Since 2019, Daman Perry has been building up his diesel performance shop DP Customs. To …, Aug 3, 2007 · The LB7 Duramax diesel is a direct-injected, turbocharged, intercooled, four-valve-per-cylinder V-8 that produces 300 hp and 560 lb-ft of torque. Starting from a blank sheet of paper, the 6.6L ... , 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 …, 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..., 7. 38. Southern Indiana. Sep 1, 2014. #16. 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 same balancer and flywheel, LBZ and LMM share the same balancer and flywheel. Than of course the reluctor wheel had to be correct., This Silverado went through a gradual evolution over the years, from a mild shop truck to a souped-up powerhouse. The earlier build consisted of a stock LB7 bore block with a balanced stock crank, Carrillo connecting rods, MAHLE Motorsports cast de-bowled pistons with valve reliefs and 16.1:1 compression ratio., Have a customer's stock LB7 (2001 CCLB 4x4) Problem started about 2 days after a FRP sensor was replaced due to it leaking. The truck will run good for about 5 minutes before the idle will start surging. It sounds similar to a lope but much faster. No issues as far as driving. I was told by a Duramax specialty shop that the lift pump on the …, 884 posts · Joined 2009. #3 · Dec 6, 2009. If the filter change doesn't work, it could be a low fuel rail pressure. I just went through that. When the engine was under load, it would go into limp mode and throw a "fuel leak -large" code. It was my injector pump not supplying enough pressure to the fuel rail., Aug 3, 2007 · The LB7 Duramax diesel is a direct-injected, turbocharged, intercooled, four-valve-per-cylinder V-8 that produces 300 hp and 560 lb-ft of torque. Starting from a blank sheet of paper, the 6.6L ... , 7. 38. Southern Indiana. Sep 1, 2014. #16. 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 same balancer and flywheel, LBZ and LMM share the same balancer and flywheel. Than of course the reluctor wheel had to be correct., 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. 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