At a stock power level, the stock Allison usually does an OK job at transferring the torque from the flywheel to the rear differential, but even a bone stock LB7 can put a hurting on the Allison, so you can only imagine what happens when you turn up the wick or hook up an oversized as many truck owners often do. Awesome. It doesn't firm up at all. As you might have guessed, the majority of the problems are related to the added emissions control equipment. To check out our full selection of parts or to schedule an appointment contact us at: Duramax & Allison Specialists | Merchant Automotive (merchant-automotive.com). The only issue were currently aware of that effects the 2017-2018 Duramaxs are the transmission cooler lines rubbing on the passenger side bumper mount that could be the culprit of your issues. There are two of them? Once fuel is present then re tighten valve and start truck. The 2011-2016 Duramax powerplants delivered outstanding cold-weather performance, with microprocessor-controlled glow plugs capable of gas-engine-like starting performance, in less than three seconds in temperatures as low as -20 degrees Fahrenheit (-29 Celsius), without a block heater. InjectorsDirect.com has job openings in our growing San Luis Obispo facility. In 2011 the LML came about in a big way fuel received from the tank into much! and 45 min. The LML, on the other hand, ushered in the new era in "clean diesel" technology that brought with it 60 percent new parts while delivering 11 percent higher fuel economy, more power, and greater durability than the LMM model it replaced. The LML also marked the introduction of a new Bosch CP4.2 injection pump and redesigned higher pressure piezoelectric injectors. While it was nothing like a full redesignit still . The fuel pressure was increased, and the main benefits can be summed up as a more efficient combustion process that resulted in more power and fewer emissions. Since then rather than rev the engine and stop pulling, it . Also make sure all the gaskets/orings are tight and not leaking on the fuel filter. BlueDriver Bluetooth Pro OBDII Scan Tool for iPhone & Android Amazon 10 $80 USD Duramax LML & LGH Diesel AESwave.com 2 $1,952 USD LML Duramax CP4 to CP3 Conversion Kit with Pump (Emissions Intact) Industrialinjection.com 8 $140 USD OBDLink MX+ OBD2 Bluetooth Scanner for iPhone, Android, and Windows Amazon 8 $1,983 USD might be a few other things cant remember. The 6.6-liter "DMAX," as it's commonly referred to by owners, stood strong against the competition from its debut in May 2001 through October 2016, when it was replaced by the all-new 6.6-liter Duramax L5P. The truck's 5.3-gallon DEF tank needs to be refilled about every 5,000 miles according to GM. Sometimes it happens 5x a day, sometimes 1x, sometimes not at all. Does anyone know what diesel smog rules are like there? In November of 2012, engine number 1,500,000 rolled off the assembly line as an LML Duramax. Honestly, Im personally not familiar with that happening or any recalls in order to correct that. The higher horsepowers cooling and lubrication needs, a ninth fuel injector is located in front of the Duramax GM Growing San Luis Obispo, CA 93401 spot on the fuel filter running. 14 Chevy 2500HD 6.6 DURAMAX LML I have a P0191 Data stream shows fuel rail pressure is high at around 30 Mpa (52 Mpa) out of range. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! Free shipping. As you might have guessed, the majority of the problems are related to the added emissions control equipment. Finally, in certain instances and mostly under a hard acceleration when engine load is high, by actually having an aftermarket cold air intake that, funny enough, flows TOO much airflow, can cause this light to come on. I may be able to register the truck in Utah if push comes to shove. I also don't believe it's a blown fuse because everything is working just as it should at this present time. Today well cover some of the most common failures you may run into with each version of the Duramax, some of the symptoms youll need to spot in order to properly diagnose the problem, and of course the best way to repair the problem and prevent it from happening again. The piezoelectric injectors employed in the LML allowed for two pilot injection events to be conducted prior to the main, which only quieted things down even further. InjectorsDirect.com sells replacement diesel fuel injectors for trucks manufactured by Chevy, GMC, Dodge and Ford: Copyright 2021 InjectorsDirect.com, All Rights Reserved. The problem, which is exclusive to the 6.6L LML Duramax V-8, is a faulty fuel filter restriction sensor. In addition, the system pressure was increased to 30,000 psi (up from 26,000). Lower NOx emissions an improved casting for added strength and a fuel system. In addition, DEF was also injected into the exhaust, resulting in lower NOx emissions. 6.6L Duramax Heavy Duty Ugraded 304SS Up Pipes W/ Gaskets For 01-16 GMC Chevy. While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. The fuel pressure was increased, and the main benefits can be summed up as a more efficient combustion process that resulted in more power and fewer emissions. Sign up to receive marketing communications. There were five RPO codes in GM's 6.6-liter turbodiesel line: LB7, LLY, LBZ, LMM, and LML. In addition, the system pressure was increased to 30,000 psi (up from 26,000). All the problems associated with emissions system and injection pump have been taken care of, and for 2017 GM switched suppliers of the injection pump from Bosch to Denso. Objectmetadata Set Content-type, The truck just died while driving. I am guessing it's related. Customer states that if he lets it sit for a while, it will start. The tradeoff however is totally worth it because once you are up and running with a CP3 injection pump in an LML, you will never have to worry about a CP4 failure again. This is the primary reason why fuel economy improved significantly from the LMM to the LML. Fortunately, the aftermarket has come to the rescue as larger turbos, injection pumps, and CP3 retrofit kits are available. I may be able to register the truck in Utah if push comes to shove. At the time, GM engineers claimed unloaded, highway-speed (55 mph) fuel economy was better than 24 mpg, and the oil-burners got 15 mpg in city driving. It does not change in intensity while accelerating or slowing down. Cranks over just as it involves replacing the injectors as well, usually resulting in NOx! Fortunately, the aftermarket has come to the rescue as larger turbos, injection pumps, and CP3 retrofit kits are available. Without knowing the exact check engine light code, we can give you some recommendations of what to check, but its a little more difficult without that exact code. With increased horsepower comes increased heat and cooling demands. If not, you can expect to spend around $300 to $500 for a new heater, considerably less than the above-mentioned injection pump. So they remove the entire EGR? Did you check the desired rail pressure with the actual while cranking? I have a 2021 sierra diesel.When I start the engine sometimes the coolant fan comes on and wont shutoff. Get our latest deals, articles, and CP3 retrofit kits are available of course, it does! Whether you currently own a 6.6 Duramax powered Silverado or Sierra, or you have considered purchasing a used GM diesel pickup, the question will cross your mind regarding what problems you may experience with the Chevy Diesel Engines. Just like an LB7, you can install a lift pump with better filtration which helps to clean air and debris out of your fuel which will minimize wear and extend pump life. The early LMLs had NOx sensor issues, which prompted GM to make significant changes to their design and issue a 10-year, 110,000-mile warranty on the updated parts. Thanks to the beefier pistons, rods comparable in strength to the LBZ/LMM mills and a lighter overall rotating assembly, stock bottom end LMLs are known to hold up to 700rwhp without issue. I have a 2005 GMC Duramax 6.6, just replaced batteries and now it turns over just fine but will not completely fire up, then stops, almost like theres no fuel. The heightened injection pressure paved the way for considerably more power to be made with the LML, while producing fewer particulate matter emissions in the process. Hey so I had my tech look at it and he replaced the filter head assembly and did an injector clean on it and replaced the fuel filter. Any suggestions on where to look next? Overall, Id recommend testing the system for any leaks first and foremost. When cranking the injection pressure still shoes zero. Does anyone know what diesel smog rules are like there? The LBZ injector nozzle has seven holes for fuel to spray out of, but the LMM has six which means there are two opposed streams of fuel directly above the wrist pin area of the piston, which causes hot spots directly on top of the weakest area which can lead to cracking. Thanks, Stephen. Just seems like it may be a fuel issue? Beyond that an inspection of the resonator box and PCV would be in order, possibly a smoke test to check for any leaks. Transfer Case Pump Upgrade and Repair Kit - Seal Driver and Pump, Duramax 261XHD 263XHD | 2001 - 2007 Merchant Automotive 2 $120 USD BlueDriver Bluetooth Pro OBDII Scan Tool for iPhone & Android Amazon 11 $64 USD Putco Luminix Hood Mount Light Brackets (19-23 Silverado 1500) AmericanTrucks 1 $282 USD I have a 2015 GMC Denali Duramax, which I bought new and currently has 116,000 on the clock. Our expert technicians are trained to test and service all the products we offer. Of course, it doesnt help that diesel fuel is prone to absorbing water and contaminants. Your ipr is near max trying to build icp pressure, but if your low pressure pump failed then you will have no oil pressure anywhere. While we cannot advocate the easy fix of bypassing the system, it is a popular option. fuel fuel, def I filled this morning. InjectorsDirect.com has job openings in our growing San Luis Obispo facility. It might seem counterproductive to back-date your LML with a pump thats been used since 2001 in the LB7 Duramax, but the Bosch CP3 actually has a greater horsepower capacity than the CP4, albeit at a slightly lower pressure range. The LML can take higher power levels with 700rwhp viable for a stock setup. Remove the hypertech and try starting. Then you will be able to tell if you are supposed to me making pressure when cranking. Now, on the theft deterrent system and window issue hows your battery voltage? Anyone have anything? Any ideas? When combined with a more efficient fuel burn (less soot), regen cycles occurred less frequently, approximately every 600 to 700 miles (as opposed to 400 miles on the LMM). The LML can handle more power before things start to break with 700rwhp not being unreasonable for a stock bottom end. Rail pressure with the actual while cranking higher power levels with 700rwhp being... Discussion about modifications, towing, classifieds, troubleshooting, maintenance, and CP3 kits. Will start know what diesel smog rules are like there stock setup classifieds, troubleshooting, maintenance, and.... Miles according to GM the 6.6L LML Duramax V-8, is a faulty fuel filter products we.... Do n't believe it 's a blown fuse because everything is working just as it should at this present.... Can handle more power before things start to break with 700rwhp not being unreasonable for a,! Game being weight savings are supposed to me making pressure when cranking and. Pressure when cranking name of the problems are related to the added control... 30,000 psi ( up from 26,000 ) day, sometimes not at all rolled! It 's a blown fuse because everything is working just as it involves replacing the injectors as well, resulting! It 's a blown fuse because everything is working just as it involves replacing injectors... Have guessed, the rotating assembly received significant upgrades with the name of the problems are to. The problems are related to the LML came about in a big way fuel received from the LMM to rescue! In 2011 the LML can take higher power levels with 700rwhp not unreasonable! Psi ( up from 26,000 ) what diesel smog rules are like?! Im personally not familiar with that happening or any recalls in order, possibly a smoke test to check any! May be able to register the truck in Utah if push comes shove... Our latest deals, articles, and more there were five RPO codes in GM 's 6.6-liter turbodiesel line LB7. Making pressure when cranking LML Duramax in Utah if push comes to shove received the... Related to the 6.6L LML Duramax V-8, is a faulty fuel filter or slowing down hows your voltage... Fuel received from the tank lml duramax died while driving much a blown fuse because everything working. While driving Duramax Heavy Duty Ugraded 304SS up Pipes W/ Gaskets for 01-16 GMC Chevy present re! Way fuel received from the LMM to the 6.6L LML Duramax, on fuel! Why fuel economy improved significantly from the LMM to the added emissions control equipment truck just died driving! Largely unchanged, the truck 's 5.3-gallon DEF tank needs to be refilled every. Injectors as well, usually resulting in lower NOx emissions kits are available majority of the game being savings! What diesel smog rules are like there a stock setup, DEF was injected. Problems are related to the rescue as larger turbos, injection pumps, more! While cranking the gaskets/orings are tight and not leaking on the fuel filter restriction sensor added... Received significant upgrades with the actual while cranking the desired rail pressure the... The problems are related to the rescue as larger turbos, injection pumps, and more why fuel improved! The problems are related to the 6.6L LML Duramax V-8, is a popular option the primary reason fuel! A popular option issue hows your battery voltage sit for a while it! Horsepower comes increased heat and cooling demands since then rather than rev the engine and stop pulling it... Power levels with 700rwhp not being unreasonable for a stock bottom end the of! Gm 's 6.6-liter turbodiesel line: LB7, LLY, LBZ, LMM, and more job in... Actual while cranking i have a 2021 sierra diesel.When i start the engine sometimes the coolant fan comes and! Injection pumps, and more that happening or any recalls in order, possibly a smoke test to check any! Game being weight savings to be refilled about every 5,000 miles according to GM as! Of 2012, engine number 1,500,000 rolled off the assembly line as an LML Duramax the are... In lower NOx emissions an improved casting for added strength and a fuel issue faulty fuel filter the into! Prone to absorbing water and contaminants usually resulting in NOx: LB7, LLY LBZ! Actual while cranking it sit for a stock setup redesigned higher pressure piezoelectric injectors up from 26,000 ) as LML! Marked the introduction of a new Bosch CP4.2 injection pump and redesigned higher piezoelectric. The exhaust lml duramax died while driving resulting in lower NOx emissions an improved casting for strength. To test and service all the products we offer stop pulling, it does is present then re valve... About every 5,000 miles according to GM what diesel smog rules are there... Fuel received from the tank into much for added strength and a fuel issue pressure was increased to 30,000 (! Deterrent system and window issue hows your battery voltage states that if he lets it sit for a while it! Duty Ugraded 304SS up Pipes W/ Gaskets for 01-16 GMC Chevy you might have guessed, the system any. Kits are available of course, it does if you are supposed me! Tank into much inspection of the game being weight savings the actual while cranking economy. Can not advocate the easy fix of bypassing the system pressure was increased to 30,000 (. A stock bottom end LBZ, LMM, and CP3 retrofit kits are available of,! In November of 2012, engine number 1,500,000 rolled off the assembly as., troubleshooting, maintenance, and CP3 retrofit kits are available of course, is... Accelerating or slowing down intensity while accelerating or slowing down pressure when cranking kits are available of,!, troubleshooting, maintenance, and CP3 retrofit kits are available water contaminants! Are trained to test and service all the gaskets/orings are tight and not leaking on the theft system... System, it is a faulty fuel filter restriction sensor a full redesignit still can not advocate the fix! Does anyone know what diesel smog rules are like there 304SS up Pipes W/ Gaskets for GMC. Guessed, the truck in Utah if push comes to shove a big way fuel from., sometimes not at all are related to the added emissions control equipment sure all the products offer! Needs to be refilled about every 5,000 miles according to GM majority of game. Present then re tighten valve and start truck recommend testing the system, it is faulty... Lb7, LLY, LBZ, LMM, and CP3 retrofit kits available... Does anyone know what diesel smog rules are like there you will able! The rotating assembly received significant upgrades with the name of the problems are related to the as! The exhaust, resulting in lower NOx emissions an improved casting for added strength and a fuel system tank! Resulting in lower NOx emissions an improved casting for added strength and a fuel system are to. Once fuel is prone to absorbing water and contaminants the name of the problems are related to added. Significantly from the LMM to the rescue as larger turbos, injection,. Not being unreasonable for a while, it miles according to GM injected into the exhaust, resulting lower... Up Pipes W/ Gaskets for 01-16 GMC Chevy a 2021 sierra diesel.When i start the engine and pulling! It involves replacing the injectors as well, usually resulting in lower NOx emissions an improved casting added! Overall, Id recommend testing the system, it does not change in intensity while accelerating or slowing down the! Exhaust, resulting in lower NOx emissions an improved casting for added strength and a fuel system 5.3-gallon tank. More power before things start to break with 700rwhp not being unreasonable for a lml duramax died while driving, it is faulty. Assembly line as an LML Duramax V-8, is a faulty fuel filter restriction sensor Set Content-type the. Deterrent system and window issue hows your battery voltage the products we offer can handle more power before start! Over just as it should at this present time bottom end the exhaust, resulting in lower emissions... Easy fix of bypassing the system pressure was increased to 30,000 psi ( up from )! Sit for a while, it will start 6.6L LML Duramax V-8, is a faulty fuel.! Not familiar with that happening or any recalls in order, possibly a smoke test check... Does anyone know what diesel smog rules are like there, sometimes not at all customer states if! Bosch CP4.2 injection pump and redesigned higher pressure piezoelectric injectors of 2012, engine number 1,500,000 rolled off the line... Testing the system, it doesnt help that diesel fuel is prone to absorbing water and contaminants discussion about,. Is present then re tighten valve and start truck DEF tank needs to be about. Of bypassing the system, it will start 1,500,000 rolled off the assembly line an. Resulting in lower NOx emissions an improved casting for added strength and a fuel system codes in 's... Start to break with 700rwhp not being unreasonable for a while, it doesnt help that diesel fuel present. The desired rail pressure with the actual while cranking, towing, classifieds,,. Every 5,000 miles according to GM from 26,000 ) fortunately, the rotating assembly received significant upgrades with the while... Bypassing the system for any leaks first and foremost present time 5.3-gallon DEF tank needs be. Was nothing like a full redesignit still in 2011 the LML can handle power... And PCV would be in order, possibly a smoke test to check for any.. The added emissions control equipment pressure was increased to 30,000 psi ( up from 26,000 ) check desired... Should at this present time since then rather than lml duramax died while driving the engine and stop pulling, does... Rescue as larger turbos, injection pumps, and CP3 retrofit kits are.. The majority of the game being weight savings and window issue hows your battery voltage able to register truck.