save hide report. LML Duramax emissions included a new Selective catalytic reduction system. June 3, 2020; Story By Mike McGlothlin; The LML Duramax left the factory packing 397 hp and 765 lb-ft of torque—but the new, more powerful horsepower and torque numbers weren’t the only changes made for the 2011 model year… This version of GM’s 6.6L common-rail diesel V8 deviates from all others in terms of its injection … Beyond simple bolt-ons—and due to the common-rail injection system—chasing horsepower with these trucks can be fairly expensive. 2011 LML Loss of power. also is worse the faster i go. I guess it's just crazy that a little bug can make a pickup fall on its face! Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! 1. I doubt it is the turbo- many GM techs don't work on to many Duramax engines- so they shoot in the dark. 3rd gear does it some. share. Actually, more and more people are tuning their 2011 + Duramax (LML) with the emissions equipment intact. Chevy 04.5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel filter, tow mirrors, BU cam, gauges, GPS, Sirius, bags, custom grille, fender vents, HD trans cooler- Curt front hitch, footwell lights, load lights, Studs, head gaskets. That would be on the suction side. However, many LML Owners have some basic questions prior to pursining emissions intact tuning. So basically it's not getting enough fuel at WOT? If you want a more powerful truck that runs smoother and saves on fuel, don’t purchase a new truck, buy the EZLynk AutoAgent 2 for your LML Duramax. Based on a theoretically ideal 90-degree “V” configuration, it combines a cast iron block with aluminum cylinder heads, … Protect your LML from catastrophic failure caused by high EGT's Fit: 2011 to 2015 Chevy/GMC 2500/3500 Duramax 6.6 L Turbo Diesel. Thanks in advance! Also incl… It really depends on what you are doing with the truck. Took it off and re-tightened it but turbo still does not spool. Hi everyone.... new to the world of diesel Pickups. JavaScript is disabled. Hi Guys, I have been having some issues of late with my 2011 duramax. Like all Duramax-powered GMs, and even though the ’11-’16 trucks made use of one of the strongest A1000s built to date, the Allison transmission will still need to be upgraded early in the modification process, namely if you plan to expose it to 450 to 500rwhp on a regu… :-( still trying to look any other ideas? Ok the Charge Pipe Drivers side is tight no issues there. Yes sir you are correct. So we went back to the shop ran a couple more diag's on it and still couldn't find anything.. Jump to Latest Follow ... Driving I do have loss of power, and now it is giving me P0299. Driving to work turbo spooling up then I hear a single POP then a gush of wind (like you would disconnect an airhose from a compressor) Driving I do have loss of power, and now it is giving me P0299. Attributes. Although emissions are necessary on diesel trucks today, they frequently cause issues, especially when they are first released. 2. This is the funny part! I just went and did a data record with the autocal and I'll send it to atp so hopefully I'll figure out what's going on! Duramaxtuner.com presents switchable calibrations for 2011 - 2016 LML Duramax. Fifth Generation Duramax Electronics/Tuners, Duramax First Generation: 2001-2004 (LB7), Duramax Second Generation: 2004.5-2005 (LLY), VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. 6.6L Duramax LML specifications & information, GM's latest version of the Duramax diesel. Hey guys im a newbie here and cant find any info on my problem here. That's what it looks like if your only seeing 16.x kPSI desired fuel rail pressure If the truck is in limp mode it may not command full fuel delivery and why your only seeing 16.x kPSI desired. How bad is it to drive the truck in its current state where it is not building boost and I'm just running off just engine power? Spend all the next day getting g … Let it idle for quite a while, went and drove it and the pickup still did it. Boost loss is on the pressure side. Now they did what they said a quick learn or program when they did it could that somehow have ruined the turbo? 1 if the tune was working just fine before it shouldn't be a tuning issue. Just hope everyone resolves that easily.. A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. This exhaust set works perfectly for deleting the LML vehicles– even with different bed and taxi configurations, although a few of the shorter length designs require to trim it to fit. While the LML seemed to be the “best” duramax to date there has been a serious disturbance since the release of the L5P. Failure to unplug the UREA system may result in a check engine light and/or dash message, erratic engine operation and loss of power. LML SMART EGT CONTROL: Duramax Tuner's LSP (Switch-on-the-Fly) Tuning includes a Smart EGT (Exhaust Gas Temperature) Control feature. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants. The UREA system must at least be unplugged but can be completely removed from the vehicle if desired. In reverse if you goose it With parking brake and foot to floor on brakes for a second you hear a woosh sound when under load and it sounds likes it coming from under or near the resonator area (black piece that has the Duramax 6.6L on it). Not specific to one version of Duramax in particular (ex: LB7, LLY, LBZ, LMM or LML), the problem exists across all generations. December 21, 2018; Story By Mike McGlothlin; 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. I wouldn't be driving it very far, you needs to find the problem or take it somewhere that can. IF the turbo is bad. Even on the driveway if you goose it I never hear the turbo spool up when it rev's over 2500 RPM. Thanks for all the help sir! there is no codes. Truck wasn't properly sensing all the air that was flowing through the intake and as a result was backing off fuel delivery. 11-16 LML Duramax Powertrain. Try turning off your traction control and see if it improves. 3 there's something wrong with the fuel ... Might want to try posting over on the Duramax Forum. They took a high level look at the truck and the hoses seem ok and they are leaning towards the turbo itself being defective. The new injection system helped make the LML the quietest Duramax to date, along with the most fuel efficient given the circumstances. 2007 LBZ 3500 LT3 DRW Crew Cab, Sulastics, Putnam XDR 15K, B&W 30K-Turnover GN+Companion, Ride-Rite Air...EFI'd by Rob. - On the 2011-2014 LML Duramax, there is a UREA system that needs to be unplugged when running this tuner. Performance Roadblocks of the LML Duramax. Replaced the mass airflow sensor, but still having problems. Both the LML Duramax and the 6.7L Power Stroke featured common-rail injection systems with Bosch piezo injectors and the new, 30,000-psi CP4.2 high pressure fuel pump (Ford’s system is pictured above). The LML Duramax was the power house for almost six years(2011-2016) when the L5P was released in 2017. Something else I want to mention is about 1 month ago (4/21) the dealership replaced my ECM and ever since then the truck 1. does not have the power it once had 2. fuel economy is lower than what it was I lost 2.2 MPG (hand calculated). Nothing was adding up as everything seemed fine until I actually try to start the thing. I've gotten 3 different answers from atp and the power shop. 24' box trailer probably 8 or 9K. I have an issue when it's cold and the traction control is on, loss of power, need to push throttle down around 25% to even make it move. My name is Danny Voss, I have been working with the tuning department at Duramax Tuner on our emissions equipped truck to get the most out of our LML (2011-2016) Duramax "The Clean Sweep" is Calibrated Power Solution's Emissions intact pull truck designed to kick butt on the pull track and drive home like nothing happened.This truck is the true definition of a sleeper. I told him hey it tries to spool up but not able to since the air is escaping but he is still thinking its an issue with the turbo itself. Talked to my mechanic, he said I bet its still the anti-theft system. The LML was introduced for the 2011 model year and currently remains in … We own an 2012 LML and had the exact thing happen after filled up at a Pilot in NC, turn out we filled with 2/3 of the tank with gasoline. I just installed a new fuel filter. Complete loss of electric power. The new 6.6L Duramax LML is the cleanest and most powerful Duramax engine to date, loaded with state-of-the-art engineering. I re-programmed it to a different tune and it still did it, pulled the battery cables off for over an hour, did 6 ignition cycles and still nothing. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more! The 304 stainless tubing also prevents loss of heat energy and does not corrode like aluminized ... \n\u003c\/table\u003e\nThe BD-Power 1403802 Passenger Side Up-Pipe is a direct replacement for your 2001-2016 GM 6.6L Duramax LBZ\/LMM\/LML. 128051000 Asking as I need to get to and from work. Wow! Haha ok so I took the pickup down to a local shop so they could run their computers on it and the diesel tech went out and drove it and said the turbo isn't building any boost and that he could manually open and close the veins at idle but they wouldn't do anything at wide open throttle. Anyone have any recommendations as to where to look? I'm waiting for the engine to cool a bit anyone have pointers or ideas of what to look at? P0299 is underboost code which if you have a boost leak will pop. http://www.toxicdiesel.co/c/249 How To Remove a LML Duramax Down-pipe of your truck. In short, this feature will automatically reduce power output as EGT's start to reach a dangerous point. Yeah I've got a full S&B intake, only thing I can think of is it flew in there while I had the filter off at some point! I Checked the hoses from what I can see (engine is real hot right now) and the charge hose (replaced month ago) looks ok. Good Deal! it is the worst when in overdrive and trying to speed up. So if I pin point it down to the fuel issue do you think installing a lift pump would cure all fuel supply issues? I did the delete because I was having constant issues with the UREA system. All in all, an excellent tuner for the LML Duramax. cleaned air filter. VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. OK, so I checked and rechecked pretty much every connection between the battery and fuse box. ... Close • Posted by 1 hour ago. In 2011, federal emissions regulations had tightened, so additional measures had to be taken to keep the Duramax compliant, so the LML was the first to be equipped with Selective Catalyst Reduction (or SCR), a system which used a urea-based exhaust fluid to break down harmful nitrogen oxides. Duramax History, Lesson 5: LML. 2 the tech said it sounded like the torque converter was going out. 3.2k members in the Duramax community. Ok so I took the Truck to the stealership because I don't have the time to work on this and need to get to work. I just installed a Bulldog controller to eliminate the DPF/UREA. Goosing it on the eway doing 65+ turbo will only show 2.6 PSI I don't hear the turbo spooling up. So to start off i have a 2011 GMC Denali HD with Idaho Rob's EFI Live tuning, drove to town earlier today, shut the pickup off for about 2 hours, went to start it up and tried to get on it and the pickup fell on its face (just like limp mode) but its not throwing any codes, no "reduced engine power", if you stand on the throttle it wont take off it just speeds up slow and shifts slow. The extraordinary power your truck will gain from GDP tunes will put a smile on your face. Replaced the Fuel pressure regulator. fuel filter. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Sounds like you popped an intercooler boot. OK so with the Truck in 4wd TC off and everything like that. Reader D.A. Going up hill fine, loses power check engine light on. I thought I had it, … writes: “Greg, have you heard of any problems services are having with the Chevy Duramax and the Loss of Engine Power.. We have one that is a constant problem and the mechanics can’t seem to find out the cause. (Pic for attention ) 4 comments. First I have heard of that, but yes a contaminated MAF sensor can cause all kinds of problems. He pulls the mass air flow sensor out and a moth was stuck to the inside of it, pulled the moth off cleaned it up and boom truck runs just like normal! I've gotten 3 different answers from atp and the power shop. Could this all be caused by them and their programming? Our 05 duramax used to be the best one we had, but recently started losing power on acceleration, every now and then black smoke. I have a intermittent power loss when driving. Yes I have the cts as a monitor. LML Pop then gush of wind loss of power. About 50 miles down the road I get the power reduced and the fuel filter life dove down to 0. I have 04 Duramax sometimes runs rough loss of power and smokes gives codes 0341,0335,0374 As I've told others, the rough running and smoke is from excess fuel when engine is running and warm. This is a great option for Duramax owners that would like a nice, quiet, reliable, efficient truck that performs well every time. For a better experience, please enable JavaScript in your browser before proceeding. It does sound like you have lost the boost in the intercooler area. Stop for a while light off next big hill same thing. Bottom Line. Press J to jump to the feed. If your truck is bone stock and you just use it for daily commuting and occasionally tow a small trailer, you will probably be safe with stock head bolts. Information about GM's 6.6L turbo diesel V8 Duramax LML engine used in the Chevy Silverado HD and GMC Sierra HD, including specs, applications, and more. Side note after the ECM replacement if I was to engage the turbo / exhaust brake it would not be as aggressive as it was prior. 100% Upvoted. JavaScript is disabled. If the top is visually intact, then the bottom end at the CAC blew off/apart. Talked to atp and they said the fuel filter would fix the problem but it didn't. just wondering if anyone has experienced this issue or know whats going on. You say its not throwing any codes so does that mean you have an Insight CTS to monitor for codes? Others have had response issues, GM … Idles just fine, shifts just fine but when you stand on it (wide open throttle) it doesn't downshift it revs up and doesn't take off but shifts at a high rpm and takes forever to get up to 70 mph. I Checked the hoses from what I can see (engine is real hot right now) … First time out with a load. We took it to the shop after changing fuel filter and they got a code for mass airflow sensor and egr. 2 the tech said it sounded like the torque converter was going out. Earlier you mentioned the resonator area 6.6 did you think about removing the resonator and do a visual checking the area out, with the engine NOT running. 01 Silverado Duramax. 1 if the tune was working just fine before it shouldn't be a tuning issue. Includes key design features, engine specs, horsepower/torque ratings, and more. For a better experience, please enable JavaScript in your browser before proceeding. replaced the mass air sensor. Diesel Power Products carries the ATS Stage 1 Transmission Package for 2011+ 6.6L GM Duramax LML PPE Heavy Duty Deep Aluminum Transmission Pan 01-19 Duramax PPE-128051000-main 0.00 PPE (Pacific Performance Eng.) LML Duramax Emissions Problems. Naturally, much less restrictions = even more power and even more effectiveness. 3 there's something wrong with the fuel system and they can't diag it without the truck being there (can't really pick up and go to Idaho or Washington lol). The temperature sensor is faulty, have it checked, and the computer is holding it in "cold start mode", like tehchoke is still on. The last question we get a lot about Duramax Diesel head gasket replacement is whether to use stock head bolts or ARP head studs. Thanks, At idle the desired and actual are both steady at 4.4 and when I wide open throttle desired is at 16.7 and actual is 16.6/.7. By 2011, the Duramax lineup had already seen four major revisions, starting out with the LB7 in ‘01, moving to the LLY in ’04½, the LBZ in ‘06 and the LMM in ‘07½.