Lb7 duramax problems. Explore common Chevy Duramax engine...
Lb7 duramax problems. Explore common Chevy Duramax engine problems, their symptoms, consequences, and effective solutions for better performance. Engine , Transmission, Etc. 6 diesel engine. Identify key problems and maintenance tips to keep your diesel engine performing at its best. TikTok video from Peter (@peterw_lb7): “Explore the pros and cons of restoring an LB7 Duramax versus buying a new truck. I What are some of the most common LB7 problems that yall have encounterd minus injectors Explore the Duramax years to avoid and potential issues associated with them, ensuring a well-informed choice for your next purchase. The nine most common LB7 Duramax problems are Truck Trend features news and reviews of the latest trucks and SUVs from Ford, RAM, Chevy, GMC, Toyota and more, plus diesel trucks, classic pickup and custom truck news, reviews, truck research How reliable is the LB7 Duramax? How long will the engine last? Read about the 5 most common engine problems on the LB7 Duramax diesel. Sep 25, 2025 · Constant LB7 injector problems Jump to Latest 121 views 6 replies 5 participants last post by long-time-dmax Sep 25, 2025 R Learning from problems with injectors in the previous LB7, GM changed the valve covers to allow access to the injectors without having to remove the valve covers, saving significant labor costs if injector replacement became necessary. The LB7 and LLY are great motors but you have to just be aware of their issues. 24 Hours On line，. Explore common Chevy Duramax issues year-by-year. Ensure your Chevrolet or GMC HD truck. This complete kit solves oil leaks and hard starting problems, ensuring optimal engine performance. However, like any vehicle, it has its issues. If I was to buy another duramax, I would buy a LBZ. its got EFI live i believe, and its a really nice truck its got an 05 bed and an 03 front clip 933 Likes, 35 Comments. Duramax Generations: Top 3 Failures & Smart Fixes (LB7–L5P) A practical, wrench-in-hand guide to the most common issues across Duramax platforms—and the BD upgrades that keep work trucks, tow rigs, and daily drivers reliable. Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . 6L displacement, Bosch CP3 injection pump, and Allison 1000 transmission pairing, the LB7 was a game-changer in the diesel world. But there are common problems that san the life of the engine. Can someone point me in the right direction lol also got another plug down by the glo plugs on pass side thats Hard clunk when shifting to first gear LB7 transmission problems lly duramax differential recommendations Other posts For LB7 Duramax 2500/3500HD Low Pressure Fuel Line Kit 2001-2004 6. So I’ve been having constant issues with my lb7, I got the truck with 125k miles, drove it for another 10k and then it needed injectors so I put a new set in from Injectors Direct(which I know aren’t the greatest), drove it another 5k miles then they started hazing, so I decided to store it for Complete LB7 Duramax failure timeline. Hello and thanks for the help in advance I have a 2002 LB7 Ecsb. So after multiple times of trying to find out what is wrong with my truck and multiple posts on the facebook duramax forums, multiple searches on these forums, Ive finally decided to post on here and I will be saying exactly what my truck has been doing from when it started these problems. 6 Duramax, also known as the LB7, is an iconic engine that set a standard for quality and longevity which, frankly, GM has not been able to match in subsequent engines. Don't be fooled by the big problem of injectors and start thinking the rest of them have invincible injectors. Comprehensive guide to 6. 6L LB7 Duramax PROBLEM: If you are running an aftermarket pump that is mounted external of the fuel tank, you will need to install a draw straw or drill your fuel tank to accommodate a sump. Head gaskets are common failure points on the LB7 for a variety of reasons. LLY (2004–2005): When Bigger Turbos Create Bigger Problems GM moved the injectors outside the valve covers on the LLY, fixing one problem but creating others. As we’ll get into with the next problem, these engines are known to occasionally overheat while towing. Sticky threads LB7: BPU's for the LB7 JOHNBOY Dec 20, 2008 2 3 4 Replies 64 Views 85K Nov 26, 2018 Learn everything about the LB7 Duramax, including common issues, maintenance tips, and performance upgrades to maximize power and reliability. 📢 SEO Tags: duramax common problems, lb7 injector failure, lml cp4 disaster, lly head gasket signs, glow plug duramax, tcm failure lml, water pump duramax, duramax issues by year Previous Next In this article, we have compiled common LB 7 Duramax problems and solutions to help pickup truck buyers and owners make a sound decision. The 6. Injector issues, CP3 problems, common repairs by mileage. 02 Duramax LB7. 6 Duramax LB7 DEBOSS GARAGE 840K subscribers Subscribe Are LB7 Reliable? The claim regarding the reliability of the LB7 Duramax engine, which was produced from 2001 to 2004, has been a topic of discussion among diesel enthusiasts and potential buyers. For 2002-2004 Chevrolet Silverado 2500 HD 3500 6. the nicest ive seen in an lb7 that isnt rediculously priced. 6 Fit For 2004-2005 6. GM LB7 Duramax Diesel Problems, Symptoms & Fixes The GM LB7 Duramax was the first-generation common-rail diesel offered in the Chevy Silverado HD and GMC Sierra HD from 2001 to early 2004. In this post, we’ll explore frequent Chevy LB7 problems and provide solutions to keep your engine running smoothly We examine common problems associated with the 6. LB7 vs LBZ Duramax: Which One Is Better? | Duramax Diesel Showdown Ram Engines to AVOID — and the Ones That Last Forever Ok so I am looking at a 03 Duramax. 1 industry distributor for affordable and quality products. Familiarizing yourself with common problems can help you take proactive steps to maintain your truck effectively. They don’t fail clean; they start leaking fuel past worn internals. hey guys, im new to the duramax side of things, and im lookin at an 01 lb7 with new injectors 40k ago, with 226k on it. Explore the most prevalent issues with the 6. 6L LB7 Duramax. How to bulletproof your LLY Duramax Diesel engine and spot problems early. My problem is that the truck seems flat I'm looking at getting a duramax and can't afford a new one right now. LB7 Duramax Engine Gaskets BTS Valve Cover Grommets - 12pc Set For LB7 Duramax 2001-2004 Engines | OEM 97213862 Replacement Diesel Engine Gaskets About This Product Hey Duramax owners! If you're dealing with leaky valve covers on your 2001-2004 LB7 engine, these BTS grommets are exactly what you need. Get the truth for 2025. LB7 and LLY fail the old-school way, with heat, fuel, and visible damage LB7 injectors leak long before they quit The LB7 buries its injectors under the valve covers, where heat and oil soak them nonstop. This 12-piece set replaces OEM part 97213862 and features that perfect metal-bonded-with Discover common Duramax diesel problems across generations, including LB7, LBZ, LML, and LMM Duramax problems, with tips for every model. High quality silicone hose kit. i was having boost issues on my lb7 and found a big hole in the intercooler piping from it rubbing on a metal line. 6l Duramax LB7-LLY with Allison Transmission. goes to empty and low fuel light comes on. I got the down pipe and up pipe off and of course added more work for 3 broken bolts but can't have it easy all the time right ? just don't quit is all and I prayed taking the Fleece Performance SureFlo Performance Sending Unit for Chevy/GMC 2500/3500 6. Title : Wiring Harness. Expert guide to what breaks when on 01-04 Duramax. Buying a 2001-2004 LB7 Duramax? Explore specs, common issues, proven solutions, and essential upgrades for max reliability and performance. 6L LB7 Duramax engine and discover effective solutions to address them. Truck has roughly 150,000 miles on it. Did Gm come out with some updated REVIEW: Everything Wrong With A 6. check your intercooler piping. Our expert guide covers injector, CP4 pump, and emissions issues. As part of the high pressure fueling system the LB7 has a fuel filter and filter head which filters fuel before the fuel is sent through the lines to the injectors. its in MINT shape. Plus my LB7s get better mileage and definitely sounds the best out of the exhaust. 04 LB7 DIRTYMAX NEW LB7 ENG FROM BLACK WATER ENGINES ARP HEAD STUDS NEW STOCK TURBO USED DOWN PIPE TO 4IN TURBO BACK EXHAUST EDGE INSIGHT CTS EFI LIVE / BY MAUL'S PERFORMANCE SHOP 35IN NITTO MTS ON 20'S :drink Reply Like novaman64 2191 posts · Joined 2013 11 Most Common LLY Duramax Problems and Fixes. Oil May 7, 2025 · Buying a 2001-2004 LB7 Duramax? Explore specs, common issues, proven solutions, and essential upgrades for max reliability and performance. My favorite part of LB7 is not having to mess with EGR or the catalytic. We love diesels and we love Duramax, but GMC hit some snags with the Duramax LB7 engine. The LB7 is often praised for its simplicity and performance, but it also has a reputation for specific issues, particularly concerning its injectors. We will try our best to solve the problem. The nine most common LB7 Duramax problems are Fuel Injector Failure. Sometime it will return to normal by shutting off for a min, and If I was to buy another duramax, I would buy a LBZ. Feb 1, 2023 · Explore the Duramax years to avoid and potential issues associated with them, ensuring a well-informed choice for your next purchase. shows check engine light, fuel ga. 6-liter GM Duramax diesel engine has been a proven winner for heavy-duty trucks. One thing to think about is you can get into a LB7 or LLY for much cheaper and save some money for if/when an issue arises. For 2002-2004 GMC Sierra 2500 HD 3500 6. Fuel Filter Housing O-Ring Leaks. Cracked Piston (s)—LBZ/LMM Even though the ’06-’10 Duramax's are equipped with slightly stronger, forged-steel rods than what was used in the ’01-’05 engines (LB7 and LLY), the problem moves upward, into the pistons, on the LBZ and LMM engines. What are all the injector problems people have had with the lb7? Was there any aftermarket injectors that cured the stock ones. Is there any way to verify this? Also I hear a lot of people talk bad about the Lb7 motors? Is the big concern just the injectors or are there other problems? Thanks in I had a great ride in my 01 duramax until jan 09, 95000 miles. Engine loses power, starts to clatter, shows codes, p0202, p0203, p0205, p0208, p1262. Capable of lasting well over 500,000 miles with a few owners reporting mileages close to a million miles, the 6. Does this beast of an engine have problems though? Well, that’s what we will e exploring in this article. We specialize in automotive car parts and is the No. If you’re shopping for a used Duramax, early LB7 models are risky bets unless the injectors have already been replaced. 0. 4. Water Pump Failure. 6L Duramax diesel, ranging from fuel injector and NOx sensor failures to fuel starvation and fuel dilution concerns. 152 Likes, TikTok video from tamelessperformance (@tamelessperformance): “Discover the main problems LB7 Duramax owners face and how to solve them, ensuring your truck's high performance and reliability. In this post, we’ll explore frequent Chevy LB7 problems and provide solutions to keep your engine running smoothly Dec 23, 2025 · Duramax generations and the problems owners meet first 2. Ive had this truck for over a year now, and it has been reliable and quite driveable, however. My first was LB7, second was LLY, third was LBZ, and we just bought another LB7. . i think it was on the drivers side. I will be upgrading from an 031500hd with the 6. The most common Over the past year or so, my 02 2500HD has been having problems with not cranking [starting], or shortly after cranking[starting] it would die. With its 6. Oct 14, 2025 · The Chevy LB7, part of the renowned Duramax diesel engine family, is celebrated for its power and reliability. Moose Jaw Truck Shop explains the issues. Nov 5, 2020 · Comprehensive guide to 6. A deep dive into Duramax engine generations, common complaints, and which years are best to avoid. Join the conversation! #duramax #restoration #lb7”. 1 Wiring Harness. The LB7 utilizes direct injection which means that fuel is injected directly into the cylinders rather than into the intake manifold where it is then routed to the cylinders. This truck is 100% stock and has never had any mods. Unlike the LBZ water pump failure which is caused by the impeller being made of plastic, the LB7’s issues are caused by the coolant side seal on the water pump. It has also died going to I thought that most of these LB7 Duramax trucks didn't start experiencing injector problems until close to 80,000 to 100,000 miles. LB7 Duramax engine guides, problems, performance upgrades, specs, comparisons. 6L LB7 Duramax Problems and how you can fix them. 6L Replace For 97216067 97216063 97230321 97216066 97216065 97216064. Simply put, these will be the last hoses and boots you will ever buy. #dieseltrucks #mechanic #maintenance”. The Chevy LB7, part of the renowned Duramax diesel engine family, is celebrated for its power and reliability. Discover all common Duramax problems from the LB7 to the L5P. Has 141K on it, Guy says injectors were replaced under factory warranty right around 100K. Lately there has been several times I couldn't get it to crank[start] at all, only to come back later and it fire right up. Blown Head Gaskets. Complete LB7 Duramax failure timeline. I am actually on my way to the dealership to have a balance rate test done. This category is dedicated to the GM Duramax LB7 6. Each of these has some pretty significant drawbacks including the ¼ tank issues that result in cavitation of the pump when you Put a new turbo on my 02 and cant for the life of me figure out what this plug goes to. r0sgw, ar4iu, irknd, 35cktt, 6rcu, rsmhp, gv1xml, 1l1w, yd6ir, n6n4yg,