Duramax exhaust leak noise


Seems to be a common leak area on the early I have a 2015 crew cab duramax. 6L Duramax diesel engine & associated components. How to Tell If Your Duramax Diesel Turbo Is Gone? by Richard Rowe Introduced in 2001 as a joint venture between GM and Isuzu, the Duramax V-8 was the General's bid to one-up Ford and Chrysler's newest generation of powerful and efficient diesels. Get the performance and sound you’re looking for out of your Duramax L5P. 6 LB7 diesel pickup or are looking to buy one, here are some common issues and problems we have run into in our shop. 6L Duramax Diesel. Make sure you go through these 5 Things you should know BEFORE upgrading! 6 Things To Know Before Upgrading Your Duramax Turbo! injectors, one directly injecting in the exhaust tract, to allow raw fuel injection during the particulate filter recycling routine. It sounds like ithe noise is coming from the  Feb 7, 2019 found this link on youtube which is similar to the sound my truck is . Recently did an oil change last week as well as new air filter. An up-pipe leak whistles (screams) like crazy, especially under load, as the pressure gets pretty high in there. After reading your post I went and looked and sure enough I am missing the front two exhaust manifold bolts on the drivers side. com FREE DELIVERY possible on eligible purchases About a couple weeks ago noticed this loud ticking noise out of nowhere. Engine noise can be hard to identify and even harder to isolate. Automotive Recalls and Technical Service Bulletins for 2011 Chevy Truck Silverado 2500 4WD V8-6. Its not a exhaust leak, ac-problem or pully/belt. " Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise. If you have  Learn everything you need to know about having an exhaust leak repaired. An exhaust leak on the downpipe often sounds like a hissing, even at idle. Next is the fuel line grounding out on the firewall. 5-2005 (LLY) Discuss the second generation (2004. Once I drive the truck the sound usually goes away and the exhaust note on it and I plan on keeping it till 160k then buying a duramax ASAP. There was a revision to one of the fuel lines at the high pressure fuel pump for a noise issue. If you own an LB7 Duramax Review you may have already replaced one set of injectors, or at least heard about how crappy their injectors are. What is this truck like to live with on a regular the exhaust bellows that allow for vibration on the exhaust pipe that feeds into the egr cooler are very thin metal and break very easily. is visible in the passenger side front wheel well. This drives me nuts, there is Sometimes while driving i hear what sounds like an exhaust leak. 6L 07. Boost leaks cause low power, slow spool-up, unresponsive throttles, excessive black smoke and high EGTs. not sure if this is related to the ticking noise that increases as the engine warms - not even 100% the now check engine is related to these things – but i’m pretty fucking sure it is. Duramax Fuel System for Dummies where a fuel leak would fill the engine oil with diesel fuel. Inspect the mass air flow (MAF) sensor for obstruction, contamination, and damage. At Alligator Performance we carry a variety of full exhausts, turbo back, cat back, individual pipes, mufflers, exhaust tips, along with other exhaust accessories. We have a 07 Classic 2500HD with the Duramax and we keep hearing a strange noise when the engine is at 1100 to 1300 rpms. Figured it was an exhaust leak and i could deal with it. The sound is more choppy and scattered that what you would expect with a boost leak. 6. I HAVE HAD THIS TRUCK FROM THE FIRST WEEK I Engine noise heard in cabin from footwell, exhaust leak? normal? 2015 Chevrolet Silverado 2500HD LTZ Duramax; I too thought it was an exhaust leak in the Air leak sound at high RPM Duramax Hard If it's still making the noise check for exhaust leaks at the #7 exhaust port. The Supra's long intercooler piping path makes it fairly hard to find the leak and can be a daunting task. Items 1 - 8 of 8 Improve the Look Sinister Diesel's has exhaust up pipes for your Merchant Automotive Exhaust Manifold Up Pipe Bolts for 2001-2016 GM  MBRP S6004P Down Pipe Back Single Side Off-Road Exhaust System PPE Race Fuel Valve for 2004. If the exhaust manifold gets corroded to the point of cracking, you'll hear a tapping sound. Over the years these trucks have been really good performers, but they do have some common problems that we see over and over again. 6L needs. 6L L5P Duramax is a diesel tuner or programmer. One of the first symptoms of a problem with an exhaust manifold gasket is an excessively noisy engine. will be so much happier with the exhaust note and noise. At 2k miles I had white steam coming out of the exhaust clamp while the truck was in regen mode. 6L Duramax L5P Specs, Ratings, & Information. 2 has what sounds like an exhaust leak when under load or mild acceleration. Injectors ticking are not a problem and you can drive with confidence. A faulty exhaust manifold gasket will produce an exhaust leak that will sound like a hissing or tapping sound coming from the engine. This L5P exhaust is expertly designed to fit perfectly without relocating the spare tire. It's underneath the car and goes from the engine to the rear bumper. 6L Duramax, came GM's first Variable Turbo technology, produced by Garrett. Can anyone tell me what exactly I need to change to get rid of the exhaust hissing noise you hear at idle with a turbo back exhaust? I want the deep rumble I hear every once in awhile when the turbo vanes change. Let us know what you think! (THIS IS AN EXTREME EXAMPLE!!) LB7 powered (through 2004 Duramax) Chevys and GMCs all suffer from injector failure at some point in their service life. Duramax Problems Common Problems with the 6. Average repair cost is $2,190 at 47,150 miles. exhaust leak, cam phasers, lifters, oil viscosity getting too thin w/ heated engine causing misfire, coils, header, manifold, rocker arm, timing issues — check engine light on? have you checked the basics? like for a vacumm leak? does it sound like a backfire through the intake or through the exhaust? 6. 5 LLY 6. 5-10 GM 6. The most recently reported issues are listed below. As high-pressure exhaust escapes from a crack in the manifold or a leak in the gasket it will sound like ticking or clicking especially at idle or low engine RPMs. The 2006 Duramax is notably These 4-inch systems finish with 5” diameter stainless steel intercooled exhaust tips that are offered in black or polished. I have taked it to the dealer a couple of times and he says it's a "normal diesel noise" but I was raised on a farm and have been around diesels my whole life (I have owned 2 CTD's and my Dad had one and now has a Duramax) and this really sounds like a leak, just like if there were a pinhole (in an older exhaust system) or like something is Hey car experts, maybe you can help me with my problems. I dont recall ever hearing the actual engine in the cab before my ordeal. Whether you want to replace your Duramax’s full exhaust system or just make improvements one section at a time, Sinister Diesel has what you need. I have all my manifold bolts and I dont see any cracks in the manifold. One of the first things we suggest when starting to tear down a Duramax pickup for a head gasket job is to remove and test the egr cooler. My truck has been with the GMC since 3/15/2011, and s The 2011 GMC Sierra 2500 has 5 problems reported for diesel exhaust fluid system. 6L GM Duramax L5P Chips | Programmers | Tuners We've said it before and we'll say it again, "The best bang-for-the buck for increasing fuel economy in your 6. I have a loud knocking noise coming from the engine . Water Pump Leaks: When the water pump is damaged, water actually  Installing Magnaflow's Turbo-back exhaust on the duramax. An exhaust system is one of the first recommend parts to install on your vehicle. Inspect for the EGR valve sticking open. 6L DSL Turbo MAY 14 Exhaust Belt Noise on Duramax Exhaust leaks or Boost leaks, you can usually hear a boost leak as a high pitched squeal or unusual rushing or whooshing air sound under load. The new Duramax engine uses an Electric EGR valve for greater precision and a larger EGR cooler to further reduce recirculated exhaust gas temperature. I also own a 2000 Chevy Silverado 2500 with the 6. The video below will walk you through the proper way to boost test your Duramax. Duramax Second Generation: 2004. Also for: Sierra 2017, Express 2017, Denali 2017, Savana 2017, Silverado 2017, Colorado 2017, Canyon 2017. ” Chevrolet Performance has worked to make the most-popular performance parts from the hottest models available to all Camaro enthusiasts, giving Camaro V-6 and SS owners the tools to build strong pulling, harder-cornering and quicker-stopping Exhaust System Noise/Leak Or Pinging Type Noise While Vehicle Cools Down: On Vehicles With Aftermarket Transmission Sump Heater And 6. instantly it became a favorite of mine for the sound quality and dyno-proven The Magnaflow system uses slip joints with clamps to hold them in place and seal them from leaking. This includes common exhaust leak symptoms and costs involved in the service. 6L Duramax diesel engine (VIN code “L”) is used on 2010 interim and 2011 Any source of fresh air into the exhaust system can create or worsen the conditions that bring about exhaust backfiring. Either fault can negatively affect engine performance and cause a reduction in power and acceleration as well as fuel economy. Though we're expecting a price increase of $3,000-$5,000, due to the addition of the "Diesel Exhaust Fluid" (urea) system, GM is back with a range of improvements and upgrades that promise to make GM the HD diesel truck leader. . This was previously accomplished by running raw fuel through the engine via the engine fuel RPO LGH 6. ak diesel driver That's exactly what I equate this sound to, and the exact part I don't want to replace, mainly due to cost  My 2015 sierra 6. Vibration at very low speed(10 mi/h) and at hi speed 60 to 70 mi/h. The most common entry point is the junction of the header pipes and mufflers. i found this out when deleting my egr while trying to get the bolts loose i moved the bellows to much and cracked them. Amazingly there is a TSB out for this problem and covers numerous years. By Ed Dorowski, ALLDATA Editor and Jeff Webster, ALLDATA Technical writer CONDITION: Some General Motors truck owners may comment on a popping/snapping noise from under the vehicle at idle or immediately after the vehicle is shut off. We also carry filters, shocks, floor mats, and other useful service parts Pure Diesel Power is proud to offer stock turbo's from Industrial Injection, Billet Cheetah Turbocharger's from Fleece Performance, and all the parts and accessories your 6. Click this link to read more about the new for 2006 360 horsepower LBZ Duramax 6600 diesel engine. I work on these The PPE 116111800 High-Flow Exhaust Manifolds with Up-Pipes for your 07. Your car is 12 or 13 years old now and an exhaust pipe won't last forever. Some popping/snapping noise from the exhaust system during cool down is a normal condition. He is experiencing a fairly loud whistling or blowing noise from idle up to around 30PSI boost. Jan 16, 2019 The purpose of an exhaust system is to make the emissions of your car less harmful before they are transferred out of the tailpipe. You need to look into this before you spend the money on a turbo. One of the most common methods of exhaust noise reduction is through the use of a muffler. Two hours later they ended up changing the clamp. Downstream of the turbo, exhaust leaks tend to sound smoother since the turbo chops up the air and smoothes out the noise. they filled with wrong antifreeze and whala I get silicone sludge throughout the whole engine blocked heater core. That's my first thought. Our diesel technicians at Precision Automotive Service are ASE-Certified and undergo extensive ongoing training to make sure they are always ready to repair your Duramax diesel. The noise and vibration are still there. Lay down on the ground next to the vehicle. When your Silverado Duramax needs a fuel injector or your Sierra Duramax needs a wiring repair, trust the experts at Precision Automotive in Loud Tapping Noise:2009 Silverado 45 Answers. 6L is capable of running on B20 biodiesel, a fuel composed of 20 percent biodiesel and 80 percent conventional diesel. Check out our listings below to help your Duramax diesel breathe better. Even though leaking exhaust pipes are a common problem in cars that have gone through a lot of wear and tear, an oil leak in an exhaust pipe is something that confuses a lot of people. Whether you are looking to tow or race, we have what you need to make your truck perform. Other times the noise can be a tiny ticking that leads to a costly, major repair. out a PCV vent hose is for exhaust to be leaking into your engine, rings,  How to diagnose blown or bad LB7 LLY LBZ LMM LML Duramax Head Gaskets. That is were it normally stops building power/boost and the noise stops. The 6. I had the transmission rebuilt thinking it was the flywheel or torque convertor and wasn't the problem but transmission Determine whether the noise is coming from the front or rear of the exhaust system. Could a cross-threaded spark plug have a leak that makes a noise? I mean the truck runs great its just that aweful noise in close enviroments pbug777 I have the same problem. An external engine oil leak can drip onto hot engine and exhaust parts causing what appears to be blue exhaust smoke. At first I thought it was comin from the top but when i get under it it's alot louder sounds like its comin from the oil pan. Excessive turbocharger or whine noise could possibly be caused by a leak in the turbocha Chevy and GMC Duramax Diesel Forum > Chevy / GMC Duramax 06-07 LBZ & LLY Forums > 06-07 LBZ & LLY Duramax Powertrain > Exhaust leak leak noise on passenger side Audible ticking on LB7 duramax I'm hoping its an exhaust manifold gasket leak and not something more serious. 6L Duramax LBZ pickup trucks. Shop Exhaust Systems for the GM Duramax 6. Duramax Diesel 2018 Engine pdf manual download. 2011 - 2013 Chevrolet Silverado and GMC Sierra PIP5007A Exhaust fluid quality poor message difficult to clear 2010-2011 Chevrolet Express, Silverado PIP4829B Service exhaust fluid message will not clear 2010-2011 GMC Savana, Sierra PIP4949C Duramax diesel hard start no start or DTC P0087 injection pump replacement ALL ENGINES I have a 2008, 2500 duramax. Either at the manifold to cylinder head or at the manifold toy pipe connection. My car use to accelerate quietly until today when all of a sudden it makes loud noise when I accelerate or hit the gas as if I have a large exhaust (but I don't) My car: 1997 Honda Civic coupe DX 189k but OD broke last year. I have 03 2500 duramax diesel with an allison tranny. 5-10: Cat-Back Systems - Amazon. At Thoroughbred Diesel, we have been installing diesel exhaust systems for many years. Kennedy Diesel is your source for Duramax performance. For those looking for a more simplistic operating turbo for higher horsepower applications, we have kits to eliminate the variable vane technology Chevy Silverado and GMC Sierra Duramax Diesel Questions I have a ticking noise in my new 2007 duramax. The new Duramax 6. A quality, high-flowing 4-inch exhaust system like this stainless-steel kit from Magnaflow is a great first modification to any diesel truck. This occurs when part of the charged air system develops a leak. The charged air system includes, intercooler piping, intercooler, y-bridge, ect. I can place the truck in park and rev to about 15-1700 rpm and the ticking will increase in volume with those revs. can also put exhaust gasses into the coolant system if they have a leak. All 6600 Duramax™ diesel engines have this condition; however, some are more audible than others. Designed to outlast your truck the manifolds are made from high-quality cast iron and the up pipes are made from stainless steel. I only think it could be spark plug 8 making the noise. 6L Duramax Diesel Engine Find Cat Back dual exhaust kits, downpipes, manifolds, headers and more for your Powerstroke, Duramax or SuperDuty diesel truck. Fresh LML delete, need advice. If the turbo is over-spooling because of an exhaust issue, you could be running lean and loosing power that way. While driving just above idle (around a parking lot for example) the noise is very present and loud. Other possible symptoms include black smoke from the exhaust when . my 05 LLY because my heat shield was making noise on warm up, and leaking. The clamp. A leaking head gasket will generally  Aug 28, 2017 The function of your diesel fuel injection system relies on careful If the injectors are activating, you should be able to hear a clicking sound. USDieselParts offers factory replacement and aftermarket parts that you can buy online such as exhaust, intake, chips, tuners, injectors, pumps, turbochargers and lift kits for 2006 2007 Chevy GMC 6. General Motors' highly anticipated reveal of the next generation Duramax diesel was momentarily interrupted by inadvertently publishing details of the engine's 2017 model year horsepower and torque figures via GM's Powertrain division website. Distinguishing between the assorted rattles, squeals, knocks and ticks is somewhat of an art form. From the headers down to the exhaust tips you can fully customize your diesel truck’s exhaust with aftermarket parts from the top brands including: MBRP, aFe, BD Diesel, Flo-Pro and many more. Customers may also comment about hearing a tick noise inside the vehicle at idle such as when sitting at a drive through window. 2 days later i had a similar exhaust leak as you stated and alot of noise in cab. Hardware required includes: plumbing that carries some exhaust gas from the turbocharger to the intake, an EGR control valve and a stainless steel cooling element. Tapping noise is noticable when at stop light, when engine is turned on and when im parking. Recently after driving it on a hot afternoon from sea level to the mountains about 3K elevation, it started to make a really loud whinning noise under acceleration and I mean it was like Something to also be aware of it that the egr cooler can also put exhaust gasses into the coolant system if they have a leak. First thought is an exhaust leak. Duramax diesel 2016 Automobile pdf manual download. Get FREE shipping and low prices at Sinister Diesel online today! From what's been described it does seem to be an exhaust leak. It's worst when pulling a trailer. The EGR valve is managed by the E35 ECM. problem started with a bad plastic tank to core seal on the radiator kids overheated it. When the gasket is performing well, the layers separate to release coolant and exhaust. 2005 LLY Duramax / ZF6 6 speed with 220,000 km (135,000 miles). This past February 4th, and we learned all about GM's plans for the 2011 model year GM 2500HD/3500 series pickups. 6L Duramax LMM increase exhaust flow by 20 percent and are 50 state emissions legal. How do I know the difference between a lifter ticking and an exhaust leak noise? In other words, if it is an exhaust leak, what evidence am I looking for? Will I be able to see the hole or can it be pinhole size? NHTSA ID Number: 10114829 Manufacturer Communication Number: PIP5442 Summary This Preliminary Information communication provides information to the technician about vehicles that have an exhaust leak, noisy exhaust, or noise mid-vehicle. Exhaust leak sound - normal??? Duramax 6600. Only code set is for the number 6 glow plug which is presumably burnt out. Engine Exhaust System Problems of GMC Sierra GMC Sierra owners have reported 14 problems related to engine exhaust system (under the engine and engine cooling category). Done on the truck: tire balance, driving shaft balance, driving shaft joint, centre and transfer case bearing. Allowing it to breathe and reduce some of the back pressure and restriction is imperative. The stock system was designed more for sound control than performance, so replacing it with the right aftermarket kit can really help reduce EGTs, improve exhaust flow, and with the right muffler offer great sound without increased in-cab noise. This is my personal 2002 Chevy Silverado 2500 HD Duramax 4×4. He has in stalled the Banks 6 Gun w/PDA, 4" exhaust with banks muffler minus the cat, and banks cold air intake. Turns out i was right but i cant deal with it, im a guy who loves my truck and it doesnt sound right with that damn exhaust leak. 3l gas runs perfect with a blown head gasket I can see it leak but it keeps on running. If you have a 2001-2004 Duramax 6. The common rail injection system used in the LB7 Duramax engine allowed General Motors to double the power output of their new diesel engine and fuel economy nearly doubled. The major concern with excessive noise coming from the exhaust system may in fact be sourced as a leak. 2006 LLY engine discussion belongs in Third Generation forum due to the differences of the 2006 LLY and the 2004. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation. EGR valve and EGR cooler – The new EGR system Decreases exhaust emissions (oxides of nitrogen / NOx) by reducing charge temperature and reducing excess levels of O2 in the combustion chamber. A well designed muffler needs to achieve several principal objectives: Provide a satisfactory reduction of ordinary engine exhaust noise during positive power operation. It has 165,000 miles on the clock, and I have owned is for nearly eight years. 0L and I had an exhaust leak that I could only pin to the drivers side manifold but I didn't know where. It has over 200K but runs strong and only used around town and highway, no towing or heavy duty driving. This message is in regard to Duramax turbocharger noises or possibly a performance or a fuel economy complaint. Bought it in September and has 4200 on it now View and Download GMC Duramax diesel 2016 supplement manual online. 6L Duramax L5P 6. Before the exhaust gas reenters the intake at this temperature, it has to be cooled. The noise usually is most noticeable at the rear of the driver’s side front wheel well. Another tick could be from an exhaust manifold leak. and diminished noise even further. 2017-2019 6. I though it could be an exhaust leak had a friend block tailpipe in hopes of discovering noise but to no luck. no head to manifold. I took it to the dealer. We offer direct replacement turbos from Garrett, Industrial Injection, and BD Power. Could be that when the muffler was replaced there were other parts of the exhaust pipe that were equally worn and just about to let go. Exhaust side noise upstream of the turbo is more choppy because of the exhaust pulses. I notice the noise a few days oil change at goodyear. exactly what a stock dp straight pipe duramax sounds like. Dealer says it is the edge of the Turbo Heat Shield just slightly touching the engine that causes this. that noise is your vacuum pump. In this post I will try to describe all my experience diagnosing and fixing boost leaks. Rattling noises from under the vehicle are another symptom of a bad or failing catalytic converter. Command the valve to 20%. He drives an '07 GMC Classic Duramax/Allison. 6L Duramax LBZ Diesel: EGR Valves - Amazon. Do NOT stick your head underneath a running car or truck! If you have an exhaust leak, you’ll be able to pinpoint its location. Since you hopefully didn't unbolt the turbo, it's unlikely that it is an up-pipe leak. If a View and Download GMC Duramax Diesel 2018 owner's manual supplement online. My 250,000 mile 5. And in the end, various exhaust treatment systems have eliminated unpleasant smells and black smoke from the tailpipe. when the module is working right it is great but about once a week it will drop my milage down to 12 miles per gallon for about 20 or 25 mile this last time it did your people told me to unplug it for 15 minutes and reboot it and I did but only have about 200 miles on it now and it has performed like it should but if it cuts me back to 12 miles to gallon one more time you will be getting it back. Pressure up the coolant passages and see if it leaks. It is important to understand how oil from the engine could reach the exhaust pipe, as well as whether the liquid Upgrading your stock turbo on any year Duramax is a big decision. The sound may be especially pronounced during a cold start or during acceleration. And with the possibility of it entering the passenger cabin can be a dangerous situation as carbon monoxide is odorless Keep a close eye on that flex pipe! If you have any questions at all about which brand of diesel exhaust is best for your Dodge Cummins, Ford Powerstroke, or GM Duramax do not hesitate to pick up the phone and call us toll-free at 1-866-737-4966. 6L V8 system features a unique cooling process that increases its effectiveness. A clogged converter will restrict exhaust flow, while a cracked one will leak harmful gas. Learn More Buy ATLAS 5inch Down-Pipe Back Aluminized Steel Race Exhaust System GMC Sierra 2500 LMM Duramax V8 6. Boost Leak: Symptoms, Diagnosis and Repair Boost leaks are a very common problem in turbo cars, especially ones with 10+ year old rubber pipes. Even a small air leak can dramatically increase the intensity or likelihood of exhaust system backfiring. 2. Exhaust leak sound? I recently went from a straight pipe, 5 inch exhaust to a 4 inch exhaust with a muffler. The Duramax Diesel 6. How many miles you got on it? The new Ford 6. Now i notice with the muffler, when my truck turns on and the vanes cycle, i can hear the cycle or turbo a lot clearer coming from the passenger side of the truck near the floor board. 0L Powerstroke initially edged marginally above the Duramax in rated power, but the Duramax will regain that title with the release of the new RPO code LBZ Duramax 6600 in the fall of the 2005 calendar year. Duramax exhaust manifold gasket leak? Jump to Latest Follow 1 - 20 of 20 Posts Started having a shrill, chirpy noise that was consistent with the speed of the I've read a little through the old posts but couldn't find an exact answer to a question I have. The noise is new and not of the usual diesel clatter. With the release of the 2004. The EGR cooler is more or less a small radiator that is a part of the engine’s cooling system, which as the hot exhaust gas passes through the cooler will cool the exhaust gas before reaching the intake manifold. Perhaps it's a small leak that doesn't leak vacuum but does leak boost? Carb cleaner shouldn't work if that's the case. Rattling Noise. 5-2005 LLY. com FREE DELIVERY possible on eligible purchases This is a customer's 2002 that he brought in because he thought it might need injectors. The Gen 5 Camaro offers great performance capability, with special models including the 1LE, ZL1 and Z/28 earning the label of “legendary. 6 duramax G It is about 7500 miles on my Colorado, time for my first free oil change and I noticed a high pitch noise, that increased in pitch as rpms went up, the check engine light came on, the DEF light came on, and the screen read that I would be limited to 65mph in less than 100 miles because of "Exhaust Fluid Quality Poor. Buy EGR Valve Kit for 2006 2007 Chevrolet Silverado GMC Sierra 2500 3500 HD V8 6. Thought down pipe was rubbing on  Doesn't sound like a head gasket to me, especially if the the radiator exhaust gas dye test was negative. This includes both exhaust gas and muffler shell noise. The application of variable turbochargers and sophisticated fuel injection systems have enabled a wide torque range and faster throttle response, while offering a considerable engine noise and vibration reduction. I guess you'll have to wait for the gauge to rule out a leak. you An integrated bypass allows non-cooled exhaust gas to be fed back into the system to help the engine more quickly achieve optimal operating temperature when cold. 6L 2011-2016 LML! XDP carries all the parts and accessories you need for the best diesel performance. 6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. I have the same sound - usually heard inside the cab during a light or medium acceleration while at highway speed. Well I also have experienced this issue. Your Duramax Repairs. Sometimes the noise can be frighteningly loud and sound ominous--only to be engine belt noise. Engine has a very bad vibration / rattle at idle which is fuel injection related and does not feel mechanical. 5-2010 Duramax LLY/LBZ/LMM 113073000 with PPE . " Hey guys so about 2 weeks ago i noticed some noise from my driver side when i started my truck. FOR THOSE WHO HAVE ISSUES WITH EXHAUST LEAKS IN THE CAB OF THEIR DIESEL TRUCK OR THEY FEEL FUNNY OR LIGHT HEADED, TIRED OR DIZZINESS AFTER DRIVING. Do this by parking the vehicle securely on level ground, with parking brake applied. 5-2005 LLY) of the 6. blown head gasket on a Duramax??? Posted By My mechanic has only done an exhaust gas coolant leak test and it came back negative to any exhaust gases in the Noise Reduction Techniques. duramax exhaust leak noise

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