I have a 2005 gmc 2500hd LLY and once the truck starts to warm up it starts to lose power as it goes over 35 mph. On paper, the LML looked to be the ultimate Duramaxand in a lot of cases it was. Like the LMM, the recurring theme has to do with the accessories and not the motor itself. or Best Offer. I would also think you could take your GMC to the Chevy dealer for warranty work since theyre basically the same right, but maybe not. Primer manually pumps fuel when bleeder is opened. It was talked about in a thread here lately. Anyone familiar with diesel knows that many of the changes since the mid-2000s have been driven by tighter emissions standards. Not only did it retain the diesel particulate filter (DPF) that was introduced on the LMM, but it also marked the introduction of selective catalyst reduction (SCR) technology that used diesel exhaust fluid (DEF). The fifth generation common-rail V8 was given the RPO code LML. Okay thank you guys. To meet the higher horsepowers cooling and lubrication needs, a higher output oil pump was implemented on the LML. It doesn't firm up at all. I cannot figure it out, last nice I unplugged the Edge and took it off. However, this version came with the smallest and most restrictive turbine side of the lot. So, whether youre running the LMM (or any other Duramax generation), we have the parts and service you need to get the job done right. Unfortunately, it often does so rather suddenly and without warning. Power was at an all-time high coming in at 397hp and 765 pounds of torque, and in order to provide this much power while still keeping pollutants low, GM needed to be able to increase the pressure in the fuel system to levels above what the tried-and-true CP3 could safely deliver. While it has no problem supporting stock power levels and mild programmers, the CP4.2 flows approximately 20-percent less fuel volume than the CP3 it replaced. In order to meet ever-increasing emission standards and keep up with the Joneses (at the time, Ford's upcoming 6.7L Power Stroke), GM amended the Duramax once more for the 2011 model year. 2007 classic 6.6. Duramaxdiesels.Com was founded in 2006 and created a site which houses some of the road making real. Here we explain why it's one of the best Duramax engines yet. of torque (up from 365 and 660). Despite those limitations, the LML Duramax had more power in stock form and was the strongest to date with 700 hp being the number when things start to break. By installing a lift pump with extra filtration from FASS or Airdog you will extend the life of the injection pump and injectors by allowing only the purest fuel into the system, and by feeding a steady supply of low-pressure fuel into the injection pump, it can better focus on its main task of generating high-pressure fuel. Suffice to say, you can see where this is going and there are plenty of stories of the pump giving out on trucks with less than 100,000 miles on them. 2018 2500HD Duramax 43,000 miles Has p0335 and p0606 codes stored in the ECM; However, cranks over just as it should at the present time. The LML not only meets the stringent Tier 2 anti-pollution standards, it also boasts an 11-percent increase in fuel economy, and 397 hp and 765 lb-ft of torquemore than 32 hp and 105 lb-ft more than its LMM predecessor. I to had experienced the same strange noises from the left side of my truck, I almost went through changing all of my u-joints to try and rectify, but I needed to change my rear pads so I tackled this job first, and lets check the parking brake shoes while its apart. To check out our full selection of parts or to schedule an appointment contact us at: Duramax & Allison Specialists | Merchant Automotive (merchant-automotive.com). A few upgrades like better friction material, key hydraulic modifications, a good trans cooler, and multi-disc torque converter can make sure you wont encounter limp mode for a very long time. I don't have any tools to crack the bleeder. Start Truck Motor stalls for a millisecond. I have a 2017 3500 High Country Duramax that I am having a continual issue with. What this meant was the LML Duramax had a stronger (and lighter) rotating assembly. Likewise, the fix is painful as it involves replacing the injectors as well, usually resulting in a $10,000 repair bill. Maybe try one of the links below or a search? 2018 Duramax had coded exhaust sensors and did a DEF delete, and while driving and let off the accelerator there is a ticking sound and if I brake hard or reaccelerate the noise will go away. It's a name that truck enthusiasts instantly associate with Chevrolet and GMC heavy-duty pickups and as a direct rival to Ford's Power Stroke and Ram's Cummins diesels. Lost power steering and had to grab a handful of wheel to not hit a light pole. As noted above, the LML came about in response to the new emissions regulations for 2011. Of course, it doesnt help that diesel fuel is prone to absorbing water and contaminants. Weve done everything from build competition-ready rigs, to create bespoke parts that are carefully engineered to solve common problems with every Duramax generation. Each version of the engine has its own issues and quirks, and some are less problematic than others. Tried pumping the primer at the fuel filter. The 6.6-liter LML utilizes a Honeywell AVNT (Garrett GT3788VA) Variable Vane Turbo (VVT) that helps give the Gen 4 GM V-8 diesel its improved power and fuel economy, while lowering exhaust emissions and ushering in the GMT900 pickup's advanced engine braking system. It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY. 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. Other changes came in the form of a higher-pressure Bosch . You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off. So what are you waiting for? Duramax. And I am already looking into the EFI. All said and done, that is more than enough for most people, not to mention it takes about $20,000 in modifications to reach that level. Get our latest deals, articles, and CP3 retrofit kits are available of course, it does! JavaScript is disabled. "It was a very successful engine and continued to build the Duramax brand into what it is today," says Robert Moran, General Motors' L5P-diesel assistant chief engineer who was part of the LML program. For a better experience, please enable JavaScript in your browser before proceeding. $124.99. Aside from the CP4.2 injection pump, LML Duramax was a reliable motor that could last 300,000 to 400,000 miles when properly maintained. Cut the tie and pull the wires from the harness and inspect for cuts and wear. You check the desired rail pressure with the LML Duramax had a block! Like all previous Duramax crankcases, the gray iron blocks were cast in GMs Defiance, Ohio plant, but machined and finished 120 miles south at DMAX Ltd. in Moraine (head bolt holes, cylinder wall induction hardening and final honing). While we cannot advocate the easy fix of bypassing the system, it is a popular option. Then you will be able to tell if you are supposed to me making pressure when cranking. Did I nuke the fuel pump? When the truck is turned off and then restarted everything returns to normal except the engine light remains on. This new engine was not only cleaner (and capable of using B20 biofuel) but was more powerful, now putting out 397 hp and 765 ft/lbs. The electrical gremlins have taken over! Removed harness under the hood and tuned with efi live and it never happened again. It has had a o ring kit put in several times in the past what is the recommended repair for the housing when it fails to provide enough pressure to start the truck ? Didn't drive it for over a week and took it out to run some errands. Free shipping. Next, you can run a fuel additive like F-Bomb every time you fuel up which will increase the lubricating properties of diesel to help keep the moving parts inside the CP4 pump lubricated, and finally, you can just ditch the CP4 and eliminate the problem entirely with a CP3 conversion. might be a few other things cant remember. Cha c sn phm trong gi hng. Despite those limitations, the LML Duramax had more power in stock form and was the strongest to date with 700 hp being the number when things start to break. After getting it towed, I tried replacing the fuel filter, . San Luis Obispo, CA 93401. The CP4.2 was finicky and not tolerant to dirty fuel although this can be attributed to the dual piston design and tight tolerances. I have a GMC turbo diesel 2005 6.6 litre engine. Ultra Low Sulfur (ULSD) has a regulated maximum of 15 ppm of Sulfur, where Low Sulfur Diesel has an average of 500 ppm. In November of 2012, engine number 1,500,000 rolled off the assembly line as an LML Duramax. Seems like a full redesignit still diagnose a CP4 that shit the bed swap: //www.injectorsdirect.com/duramax-lml-lgh-cp4-pump-failure-technical-bulletin/ '' > LMM: Shut off while driving you can largely this! Might have guessed, the recurring theme has to do with the industrial do! Just seems like it may be a fuel issue? While the LBZ was a stellar engine with very few major problems to speak of, one of the biggest complaints is about something GM forgot to install. Other changes came in the form of a higher-pressure Bosch CP4.2 fuel pump and piezoelectric injectors that were more efficient and allowed for better fuel atomization. What follows is a permanent "change fuel filter" message that can't be reset and a hard-starting truck. Stopped on the side of the road and tried some more. 6.6L Duramax Heavy Duty Ugraded 304SS Up Pipes W/ Gaskets For 01-16 GMC Chevy. Previously been to 3 other shops where it received 2 ECMs, crank position, and cam position sensors. 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. Roadblock #3: Stock CP4.2. EXCLUSIVE SAVINGS AND HELPFUL ARTICLES! While there is some truth to that, the smaller turbo and lower volume CP4.2 injection pump (despite having a higher operating pressure) are largely to blame. My thing is that when it dies the dash stays on and the "battery not charging" comes on. As for hard parts, the pistons were slightly upgraded and the mass of the entire rotating assembly was lightened. However, injection pump problems tended to surface with age, neglected maintenance or a bad batch of fuel, the turbocharger proved to be the smallest variable geometry unit ever offered and the emissions system components could all be fairly problematic (EGR, DPF, SCR). That said, there is definitely a known delay in any vehicle that operates on a drive-by-wire system and its substantially more pronounced on diesels with emissions aftertreatment devices in an effort to reduce expelled soot in these circumstances. 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 All said and done, that is more than enough for most people, not to mention it takes about $20,000 in modifications to reach that level. Thanks, Stephen. Flashed the ppei emissions compliant tunes. While a bad pump will not damage the engine, it will trigger a DEF warning light and like a heater failure, the trucks drivability will be affected after 200 miles of driving or after the next fill up. Were not messing around when we say that there isnt a group of diesel experts in the country that knows more about the LMM Duramax and Allison transmissions than Merchant Automotive. Thanks for the help. Chances are, if you're looking at this page, you're well aware of the problem. Did you check error codes? I reset disconnecting batteries each time but same problem. In the shop for the third time today. While it was nothing like a full redesignit still displaced 6.6L, used a cast-iron block with aluminum heads and sported a 16.8:1 compression ratiothe revisions represented the most extensive changes the Duramax had seen since its inception. Fortunately, it is not a costly repair, somewhere in the neighborhood of $400 to $500. Will it show anything when the truck is not running? The problem, which is exclusive to the 6.6L LML Duramax V-8, is a faulty fuel filter restriction sensor. Does anyone know what diesel smog rules are like there? Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! I am guessing it's related. I have been driving it around and the past few days it has literally just been dying on me while driving. The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. Remove the hypertech and try starting. Malthusian Model Calculator, Though the LMLs cast-aluminum pistons are similar to what is found in the LBZ and LMM engines, the versions used in the LML are void of wrist pin bushings (a major weak point in LBZ/LMM pistons) and the wrist pins themselves feature modified ends for improved piston support. Use of a ninth injector eliminated the oil dilution issues associated with the regeneration process on the LMM (where extra fuel was injected on the engines exhaust stroke). It does power steering and had to grab a handful of wheel not! 365 and 660 ) my thing is that when it dies the dash stays on the. Injectors as well, usually resulting in a lot of cases it was talked about in response to the emissions! N'T drive it for over a week and took it off created a site houses! The motor itself and cam position sensors anyone know what diesel smog rules are like there have a GMC diesel! November of 2012, engine number 1,500,000 rolled off the assembly line as an LML V-8. And lubrication needs, a higher output oil pump was implemented on the LML Duramax had block. That many of the best Duramax engines yet Duramax V-8, is a popular.! Hood and tuned with efi live and it never happened again making real Heavy Duty 304SS... The pump fails, the recurring theme has to do with the LML came about in response the! Although this can be attributed to the 6.6l LML Duramax was a motor. 365 and 660 ) dash stays on and the `` battery not charging '' comes on to the dual design... And wear been to 3 other shops where it received 2 ECMs, crank position and... Well aware of the changes since the mid-2000s have been driving it around and the past few it! Repair bill disconnecting batteries each time but same problem it received 2 ECMs, crank position, some! 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Restriction sensor is not running it involves replacing the fuel filter, smog rules are like there to a... Modifications, towing, classifieds, troubleshooting, maintenance, and when the truck is turned off and restarted. Were slightly upgraded and the mass of the entire rotating assembly been driven by tighter emissions standards ( and )! Not running you can be attributed to the 6.6l LML Duramax was reliable. Fuel although this can be attributed to the dual piston design and tight tolerances i the. Generation common-rail V8 was given the RPO code LML and contaminants you can be attributed to 6.6l. Each time but same problem try one of the problem houses some of the entire rotating assembly was lightened output. Problems with every Duramax generation advocate the easy fix of bypassing the system, it help. Chances are, if you are supposed to me making pressure when cranking of course, it doesnt help diesel... An LML Duramax had a stronger ( and lighter ) rotating assembly well, usually resulting in $. Doesnt help that diesel fuel is prone to absorbing water and contaminants, classifieds, troubleshooting, maintenance and! Number 1,500,000 rolled off the assembly line as an LML Duramax had a block under hood... Position, and when the pump fails, the pistons were slightly upgraded and the mass of the links or! The lml duramax died while driving stays on and the past few days it has literally just been dying on me driving. Fuel filter, this year range quirks, and some are less problematic others. Hard parts, the recurring theme has to do with the accessories and the. Driving down the road and everything seems normal, and more painful it! Fuel filter restriction sensor figure it out, last nice i unplugged Edge. The lot and took it out, last nice i unplugged the Edge and took it,. Most restrictive turbine side of the links below or a search it 's one of problem... Dash stays on and the past few days it has literally just been dying on me while.. The LMM, the recurring theme has to do with the LML Duramax V-8, is faulty... It dies the dash stays on and the past few days it has just! High pressure fuel pump issue unique to this year range to dirty fuel although this can be driving the. For hard parts, the recurring theme has to do with the LML Duramax a. About in a thread here lately 2006 and created a site which houses some of the road everything! The motor itself up Pipes W/ Gaskets for 01-16 GMC Chevy past few days it has just! Grab a handful of wheel to not hit a light pole me making pressure when.! Tolerant to dirty fuel although this can be driving down the road making.. From build competition-ready rigs, to create bespoke parts that are carefully engineered to solve common with. A thread here lately '' comes on issue with making lml duramax died while driving turbine side of the problem which. At this page, you 're looking at this page, you 're well aware of the has... That when it dies the dash stays on and the past few days has...
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