Duramax l5p forum

2021 GMC 3500 SLE 27k miles. Not sure I should feel happy it was under warranty but originally took the truck into GMC dealer for what sounded like a boost leak. No codes, no other symptoms other than using 7 gallons of DEF in 2800 miles. Which seems excessive for not towing. Hold the brake add trottle and can hear loud hiss.

Let’s assume you log onto a bunch of different websites; Facebook, Gmail, eBay, PayPal, probably some banking, maybe a few discussion forums, and probably much, much more. Consider...Fortunately I have the extended warranty on my 2017, which covered the reservoir replacement with a $50 deductible. I recently bought the UView 550000 Airlift Cooling System tool with plans to perform the drain and flush on my 3500HD Duramax (61k) and wife’s ‘17 2500HD gasser (58k). the videos make it look pretty simple.Apr 15, 2017 · The CTS2 also has a throttle position indication. It would be interesting to watch a comparison for those experiencing the dead pedal versus ours that accelerate like a rocket the relationship between throttle pressure and boost. This would troubleshoot if it is the sensor or a performance issue with the engine. DALLAS — GMC today announced the redesigned Duramax 6.6L V-8 turbo-diesel offered on the 2017 Sierra HD. This next-generation redesign offers more horsepower and torque than ever — an SAE-certified 445 horsepower (332 kW) and net 910 lb.-ft. (1,234 Nm) — to enable easier, more confident hauling and trailering.Keep it L5P Related. Please keep it l5p related, share any knowledge you have with the group, if you own or looking at buying an l5p you are more than welcome …

The world of sports is not just about the athletes and their performances on the field. It’s also about the passionate fans who support their favorite teams and engage in discussio...1) the filter will not physically fit. The diameter is too big (cooler changed in 2020) and without relocating the secondary coolant pump, it's too long. 2) the CAT filter adapters sold previously don't work as the oil cooler threads have changed now. 3) the CAT filter has no internal bypass valve. L5P's pump monster amounts of oil and pressure ...Hello, I have a stock 2018 L5P 140k miles and am getting code P20EE. I have replaced both nox sensors and def injector with no change in nox performance, reset sensors with snap on scanner. At highway speeds nox1 is usually around 200-300ppm and nox 2 is almost always higher, rarely even with 1 and sometimes as high as 1100ppm, …1194 posts · Joined 2013. #9 · Feb 9, 2017. In for updates also.. 2016 lml chevy ccsb. Last december installed a HSP compound turbo kit with a stainless diesel 5 blade S475 over stock. And a exergy 10mm cp3 conversion kit but still stock injectors and transmission. 5" flo-pro exhaust with no muffler and tuning is done with EZ Lynk by PPEI.Oct 18, 2009 · 2006 LBZ, 2009 LML, 2022 L5P. 1993 6.5 parked in the shed. Rotating mass and rolling resistance matter, more so rolling resistance. The more tread, and less engineered the casing is, the higher the rolling resistance. Lower air pressure for better ride also increases rolling resistance.

Feb 19, 2019 · 329 posts · Joined 2017. #19 · Feb 21, 2019. I would say your DIC is probably over by 1 mpg by my experiences with 23K mileson a '17 2500 LTZ. Mileage improved a little and I have never reset my 2nd mileage meter which reads 16.2 mpg for the average life of the truck with say 55% city and 35% highway and 10% towing. 285 posts · Joined 2019. #39 · Mar 5, 2021. Got rid of that awful fuel filter system on the L5P and installed a Fleece filter delete. Easy enough, but for anyone doing it, don’t take the shield with the housing. All you need to do are the two 13mm bolts at the back, top/side. You’ll understand when you look at it.May 10, 2017 · Go take a look at a Duramax Forum, its scary. Just on the first page. Major growing pains. Never be the launch customer for any new product, always wait for 2nd generation. 2017 l5p blown turbo gasket Engine light Ticking Noise Near Engine/Transmission L5p problems 2017 Tranny Issues Oil Leak L5P transmission temps high vs 2015 lml 1194 posts · Joined 2013. #9 · Feb 9, 2017. In for updates also.. 2016 lml chevy ccsb. Last december installed a HSP compound turbo kit with a stainless diesel 5 blade S475 over stock. And a exergy 10mm cp3 conversion kit but still stock injectors and transmission. 5" flo-pro exhaust with no muffler and tuning is done with EZ Lynk by PPEI.Duramax L5P Engine Failures. I am not suggesting that there is any problem (s) with the 2017 to current L5P Durmax Engines. I am curious owning a 2021 L5P myself if anyone has had any serious issues with this engine. In doing research I find problems like NOX Sensors, DEF heaters / tanks, and injector electrical plugs, but that is about it.

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36 posts · Joined 2010. #4 · Jul 11, 2017. I currently have 9K miles on my L5P. I drive 70miles round trip to work, non-highway, with hills through towns. I had set the trip odometer the day I bought it and it's averaging almost 17, including some mild camper towing. Tank to tank I'm seeing better than 18 with regens.And now GM is moving to encryption of canbus data in an effort to stop hacking of any onboard modules. However when GM ditched the LML's piezoelectric injectors for the Denso solenoid injectors, they actually made controlling the L5P hardware with an older ECM much easier. No need for swapping or modifying the heads to use old …Chevy / GMC Duramax 2017+ L5P Forums. 2020+ GM T1 Platform Powertrain. Looking for good funnel to use with 2.5 gallon oil jug. Tags funnel oil change. Jump to Latest Follow ... Chevy and GMC Duramax Diesel Forum. 3.8M posts 208.5K members Since 2005 ...Feb 11, 2022 · 2020 L5P Duramax Problems. I have 61,000 miles on a 2020 gmc sierra 2500hd denali with the L5P duramax, I want to love this truck, but over the last 2 months the def system has failed, the entire emissions system has failed, coolant sensor level has failed, and a heater core has failed. The dealership says GM will not cover any of it under ... P0206, P0306. I have a 2018 3500 with L5P. I took it in for recall on the regeneration interval and engine block heater. Two weeks later it threw nitrogen oxide sensor warning. i ordered part and kept driving. then it went into engine power reduced check emmisions. apparently it wont regenerate when check engine light is on. paid to …Chevy / GMC Duramax 2017+ L5P Forums. 2017-19 GM T-K2 Platform Powertrain L5p problems. Jump to ... 2017 GMC Sierra 2500HD SLT CCSB 4x4 L5P Duramax, stock

Durabiopwr. 241 posts · Joined 2021. #2 · Dec 15, 2022. P100b appears to be turbo actuator issues. P2002 could have been related to the plugged up map sensor. Air ratio off if its plugged up. Might go away if map sensor replaced. But if turbo actuator messed up its gonna make more smoke too and plug dpf. 2020 GMC 2500 CCLB work …We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform. From all out performance builds running 8 second ¼ mile territory, to 2000hp sled pullers and all the way back to the average guy looking to boost his performance in his tow rig to get up those hills a little …Oct 3, 2016 · MC_Diesel Discussion starter. 124 posts · Joined 2013. #1 · Oct 3, 2016. Looks like GM is upping the ante once again. The MY17 L5P Duramax reported to have 445 hp and 910 lb-ft. :surprise: 2019 3500 SRW Mega Limited HO Cummins/Aisin:grin2: Sold: 2013 2500 Mega Laramie Longhorn :thumbsup: Share. Like. according to the capacity charts on gm-techlink the oil capacity has been 10 qts. on both 2019/2020 even though the filters changed. The filter on the 2019 L5D is the smaller filter just like the 2020 L5P and it takes 10 qts. as well. I have used 10 qts. on all my dmaxs and they all showed full-- just sayin".Chevy / GMC Duramax 2017+ L5P Forums. 2020+ GM T1 Platform Powertrain. Sensor cleaning. Jump to Latest Follow 31K views 32 ...The L5P Duramax Will Never Be Tuned. Period. On September 24, 2017, a statement was issued on a Duramax discussion forum which made the bold claim that the L5P Duramax ECM would never be tuned, and the security protocols were so advanced, even the NSA would not be able to tackle the job. The post went into further detail about the security ...Connecting to the Internet has plenty of benefits, such as, paying bills online, checking email, messaging friends, posting on forums, and much more. How do you get that computer o...Chevy / GMC Duramax 2017+ L5P Forums. 2020+ GM T1 Platform Performance Parts Discussion. Edge EvoHT2. Jump to Latest Follow 4K ... Chevy and GMC Duramax Diesel Forum. 3.8M posts 208.4K members

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Chevy / GMC Duramax 2017+ L5P Forums. L5P TSB (service bulletins, recalls, updates) ... but there is an RV hauling person on this forum with 200,000+ miles on a 2017 L5P Duramax and have only experienced minor repairs to date. Due to your situation being so rare, ...P0206, P0306. I have a 2018 3500 with L5P. I took it in for recall on the regeneration interval and engine block heater. Two weeks later it threw nitrogen oxide sensor warning. i ordered part and kept driving. then it went into engine power reduced check emmisions. apparently it wont regenerate when check engine light is on. paid to …Just upgraded to the L5P. Discuss the seventh generation of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.2018 l5p no start. 2018 chevrolet 4 door cab and chassis. truck will run for 35 seconds then shut off. After replacing the HP4 truck ran good for about 10-15 miles then it just died out and wouldnt start back up. let it sit over night come back the next morning and it will fire right up and run for about 35 seconds. the HP4 was replaced due to ...The LoJack—the small geolocation device you can keep in your car to help find it if it's stolen—is a pretty expensive little device. Lizard Lounge forum member Gelmi decided to mak...NachO_GMC. The L5P is a complete Engine redesign - the rest of the truck is the same - Wheels, to headliner. We have minor improvements like locking tailgate and some infotainment upgrades - mostly quality of Life type improvements. the Engine is Unproven when you compare the # of miles on the road to the LML's.Chevy / GMC Duramax 2017+ L5P Forums. 2017-19 GM T-K2 Platform Powertrain. Anyone happy with their L5P. Jump to Latest Follow. 127K views 224 replies 105 participants last post by Bear76 May 14, 2023. mzodarg Discussion starter. 431 posts · Joined 2015. #1 · Jun 18, 2018.No major, recurring issues with the first generation of L5P trucks. One of the most common is the coolant tank sensor going bad. Another thing that owners have …Excessive regens! I just picked up a new 2019 GMC 3500 Denali 2 weeks ago. It has the new L5P in it which I love the power and torque. I had a 13 LML and a 15 LML and the 13 I deleted emissions problems solved, the 15 I only had 38,000 on it when I just traded it and I never deleted it. At worst I would get 300 before a regen in the 15 …LML to L5P isn't as big of an improvement in the technology of the motor, so it would have been a little more difficult to justify, in my opinion. "Aut viam inveniam aut faciam". Derek. "Daddy Shark" 2017 GMC Sierra 2500 Denali, Crew Cab Short Box, 122k Miles. "Big Red" 2008 Chevy Silverado 2500HD Ext Cab Long Box, 262k miles (GONE) blythkd1.

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Mar 5, 2021 · L5P fuel filter failure. After being down for weeks I finally took off on another haul yesterday and almost made it 100 miles. Pulled over and shut the truck off. Came back out and all it would do is crank. No start. Tried a few things that didn’t work then dropped the new GM fuel filter for a look. 2017 GMC 2500HD 4x4 Denali. 4.5" BDS Suspension Lift with Fox Shocks and BDS Steering Stabilizer, Cognito PISK kit, 295/65R20 Cooper STT Pro's on 20X9 +12 Ultra Predator II wheels, MGP Caliper covers, 30" Totron Lightbar behind the grill, Audiocontrol LC2i, Rockford Punch P500X2 powering 2 Rockford Punch 10's in a Ground Shaker box. Save Share.Are you passionate about wrestling? Whether you’re a novice or an expert, the Penn State Wrestling Forum is a valuable resource that can enhance your knowledge and connect you with...This VSE unit IMO is best since there is filtration AFTER the WIF sensor. Single filter L5P aftermarket units the WIF sensor is on the 'clean' side of the filter....if the water light comes on then it's too late. Stock filter has 2 sets of filter media in it, main one before the WIF and a secondary filter bit after the sensor.I just took delivery on a 2500 L5P. My Supplement recommends Top Tier Diesel which is almost impossible to find nationwide and if Top Tier is not available "GM recommends the use of ACDelco Diesel Fuel Conditioner" GM naturally does not recommend other aftermarket additives. My prior diesel ownership was a 2011 VW Touareg with the 3.0L TDI.1058 posts · Joined 2016. #6 · Sep 1, 2022. never looked but did change two today from top as it was hot out, two 10 mm bolts on cover remove hot pipe and bungie to side, pop off fuel lines using Lisle Kit, 37000 and cover will pop off leaving injector connectors, did not feel like removing fender well and wheel and climbing in! a little ...1112 posts · Joined 2009. #1 · Dec 14, 2020. Pretty sure this is last GM truck for me , now my 19 high country dually lost oil pressure at 65,058 miles 16 months old, been serviced every 10,000 or more often and stranded me twice now, this time really bad area and chevy road service left me on the side of the road for 6 hours, paid the tow ...Mar 12, 2024 · The diesel exhaust system on 2017-2018 Silverado and Sierra models and 2019-2020 Silverado 2500/3500 and Sierra 2500/3500 models equipped with the 6.6L Duramax diesel engine (RPO L5P) (Fig. 1) requires an occasional Diesel Particulate Filter (DPF) cleaning. Under normal driving conditions, the DPF cleaning occurs without any driving involvement. The GM L5P Duramax is a turbo-diesel engine produced by General Motors for use in full-size heavy-duty (HD) pickup trucks. Displacing 6.6 liters in a V-8 configuration, the L5P is part of a new ... ….

Chevy / GMC Duramax 2017+ L5P Forums. 2017-19 GM T-K2 Platform Powertrain ... Chevy and GMC Duramax Diesel Forum. 3.8M posts 208.6K members Since 2005 A forum ...Feb 11, 2022 · 2020 L5P Duramax Problems. I have 61,000 miles on a 2020 gmc sierra 2500hd denali with the L5P duramax, I want to love this truck, but over the last 2 months the def system has failed, the entire emissions system has failed, coolant sensor level has failed, and a heater core has failed. The dealership says GM will not cover any of it under ... Duramax Diesel Engine Oil Filter Update for 2023. September 20, 2022. The PF63 engine oil filter (Fig. 5) is the new recommended filter specification for 2020-2023 Silverado 2500HD/3500HD, Sierra 2500HD/3500HD, Express, Savana; and 2019-2023 Silverado 4500/5500/6500 models equipped with the 6.6L Duramax diesel engine (RPO …Chevy / GMC Duramax 2017+ L5P Forums. 2017-19 GM T-K2 Platform Powertrain. L5P fastener torque specs. Jump to Latest Follow 18K views ... 2018 Silverado 3500 6.6L Duramax (L5P) LTZ Z71 Crew Cab. Save Share. Like.Durabiopwr. 241 posts · Joined 2021. #2 · Dec 15, 2022. P100b appears to be turbo actuator issues. P2002 could have been related to the plugged up map sensor. Air ratio off if its plugged up. Might go away if map sensor replaced. But if turbo actuator messed up its gonna make more smoke too and plug dpf. 2020 GMC 2500 CCLB work …From my experience and what I've heard, the L5P Duramax is a solid engine with impressive performance and reliability. However, like any engine, it's not immune to issues. A few peoples have reported problems with the emissions systems, particularly the DPF and SCR system. Additionally, occasional issues with injectors and fuel systems …NachO_GMC. The L5P is a complete Engine redesign - the rest of the truck is the same - Wheels, to headliner. We have minor improvements like locking tailgate and some infotainment upgrades - mostly quality of Life type improvements. the Engine is Unproven when you compare the # of miles on the road to the LML's.I assume dp is differential pressure sensor. Unsure if programming is needed for that. 2019 3500HD, Cclb, Drw, Deleted and Tuned, Wehrli turbo horn, intake, boost tubes, Banks idash, S&B map spacer, VSE fuel filtration, 5 inch exhaust. The NOX sensor require a relearn/reset. Higher end scan tools have this capability. Duramax l5p forum, Human-powered search site Mahalo launches a familiar-seeming group Q&A forum, Mahalo Answers, with a Google-like twist—having the best answer might just earn you a few bucks from t..., Oct 18, 2009 · 2006 LBZ, 2009 LML, 2022 L5P. 1993 6.5 parked in the shed. Rotating mass and rolling resistance matter, more so rolling resistance. The more tread, and less engineered the casing is, the higher the rolling resistance. Lower air pressure for better ride also increases rolling resistance. , 491 posts · Joined 2017. #3 · Dec 17, 2017. It certainly should be downshifting at full throttle when it is towing at 1700 RPM and losing speed. The L5P equipped truck did very well in the Ike review towing a much heavier load and it did downshift when needed; realize that peak horsepower is well below governed speed so it won't normally be ..., NachO_GMC. The L5P is a complete Engine redesign - the rest of the truck is the same - Wheels, to headliner. We have minor improvements like locking tailgate and some infotainment upgrades - mostly quality of Life type improvements. the Engine is Unproven when you compare the # of miles on the road to the LML's., 2024 L5P RATTLE / TICK AT IDLE. Hello All, I'm new here and this is my first post. I took the new truck to the dealer for tick noise at idle. Many post regarding DEF Injector tick which I'm familiar with (3rd Duramax) and type writer tick (3 Ford diesels too). The tech's heard it too and were under the truck, and couldn't immediately figure it out., Jun 2, 2021 · Duramax L5P Engine Problems. MAP Sensor Failure. Allison 1000 Transmission. Fuel Injector Failure (#4 Injector) Finding 3 problems with the L5P was difficult. While these engines are still relatively new, they seem to be extremely reliable so far with very few “common” problems that haven’t been solved or addressed. , Oct 18, 2019 · 2018 GMC l5p ccsb stone blue metallic. Mcgaughy's 2" drop shackles. Truxedo tonneau cover. 20% tint. ... Chevy and GMC Duramax Diesel Forum. 3.8M posts 208.4K members ... , The chart below shows general L5P Duramax maintenance and service intervals. Please keep in mind your situation may call for more frequent maintenance than what is listed below. Heavy towing or driving in extreme conditions requires more frequent maintenance. When you change your oil, check components like your air filter to make …, 3748 posts · Joined 2021. #2 · Jun 21, 2023. If you're going to vent the crankcase to atmosphere, it's gonna drip. That's why there's emissions rules now to require closed crankcase ventilation. 06 LBZ 2500 350,000mi 09 LMM 3500 Cutaway 700,000mi 22 L5P 3500 DRW. All currently on road., The L5P has almost a second faster 0-60 time than the same LML on paper. As I said, I had a 13 LML stock, and now have a 18 L5P, both were bought brand new, and the L5P is much quicker!! Not even close! The LML is 397/765 in power, the L5P is 445/910., Chevy / GMC Duramax 2017+ L5P Forums. 2017-19 GM T-K2 Platform Powertrain. L5p problems. Jump to Latest Follow. 274K views 125 replies 65 participants last post by …, viper8315. 4158 posts · Joined 2019. #8 · May 15, 2021. If it were my truck. I'd take it out and inspect it myself. That way I'd know for sure. Tim. 2019 Chevy Silverado 2500 High Country L5P CC/SB. S&B CAI, Banks Derringer & Pedal Monster w/iDash, Banks differential cover, Bilstein 5100 shocks, Morimoto xB headlights, tail lights and fog lights., 166 posts · Joined 2021. #5 · Sep 26, 2021. I just got the 2022 Duramax 6.6 diesel and drove 500 miles with her, its a monster all right but drives like a dream. 2022 2500HD Denali, iDash, PedalMonster, Banks Diff Cover, Banks CAI, Xpel/Ceramic. edktm and Elchilero53., 2021 GMC 3500 SLE 27k miles. Not sure I should feel happy it was under warranty but originally took the truck into GMC dealer for what sounded like a boost leak. No codes, no other symptoms other than using 7 gallons of DEF in 2800 miles. Which seems excessive for not towing. Hold the brake add trottle and can hear loud hiss., Duramax Diesel Engine Oil Filter Update for 2023. September 20, 2022. The PF63 engine oil filter (Fig. 5) is the new recommended filter specification for 2020-2023 Silverado 2500HD/3500HD, Sierra 2500HD/3500HD, Express, Savana; and 2019-2023 Silverado 4500/5500/6500 models equipped with the 6.6L Duramax diesel engine (RPO L5P, L5D). Fig. 5., 83 posts · Joined 2018. #4 · Jul 2, 2019. You are pulling way to much weight for your truck. The L5p was a very small exhaust side configuration, small up pipes, small exhaust turbo vanes, etc. So I am guessing the ECM was seeing some very high EGT’s and cut power to keep from melting pistons. Like., 2602 posts · Joined 2008. #4 · Mar 12, 2017. In my opinion, A lot of engineering went into the new PCV system. I would leave it alone on the new l5P. On a LML or LMM, yes it may benefit you to make a change. 2017 L5P CCLB DRW LBZ. 2015 LML sold. 2014 LML sold. 2005 LLY sold., Human-powered search site Mahalo launches a familiar-seeming group Q&A forum, Mahalo Answers, with a Google-like twist—having the best answer might just earn you a few bucks from t..., Sounds very familiar to my complete Injector failure at 5700 miles on my 2018 3500 L5P that happened yesterday. Take it to get checked out before you get stranded. 2003 Chevy HD2500 Long Bed LB7 Allison 1000 all stock. 2018 DENALI 3500 SRW Long Bed L5P 2" Level, Bilstein shocks, 18" TOYO AT2 285's on stock wheels., Aug 12, 2020 · I would never consider a LML after owning a L5P. $1500 to delete a Cummins or LML. $7,000 to delete an L5P. $3,000 to convert from a CP4 to CP3 on the LML. $700+ to level the GMC/Chevy compared to $100 to level the Ram. Personally, I would never consider long-term ownership of a modern diesel with emissions intact. , Lucas Diesel Deep Clean in L5P. As just about everyone has mentioned, I was getting a little irritated about my DPF regenerating every 300 miles so I went out and bought a bottle of Lucas Diesel Deep Clean and put it in with my last fill up. It was in the middle of a regen and after it finished I've been keeping track and after 550 additional ..., Scrapyard. Let your dealer know. There was a least one bulletin regarding leaks. 2017 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPO L5P) may display a Driver Information Center low coolant message or may show coolant consumption or a coolant leak., Mar 26, 2024 · I recently got a '17 L5P, ~83,000 miles. Let me preface by saying I have owned 12 diesels, (4) Powerstrokes, (2) Duramaxes, (5) Cummins and a Ecodiesel. I am not new to them. I struggle to get more then 15-15.5 mpg in this truck and its driving me nuts. Dash MPG's aren't even remotely close except for the 400+ mile range which is about 1 mpg high. , Not a single issue until 4/04/2021. 7812 miles, had been driven 150 that day, 20 miles from home, check engine light, derate & shut-down in seconds. Lotsa white smoke. Dealer replaced fuel pump, still no start, no fuel pressure, lift pump working perfectly. Maybe $77,000 isn't enough to get one to 10,000 miles., viper8315. 4158 posts · Joined 2019. #8 · May 15, 2021. If it were my truck. I'd take it out and inspect it myself. That way I'd know for sure. Tim. 2019 Chevy Silverado 2500 High Country L5P CC/SB. S&B CAI, Banks Derringer & Pedal Monster w/iDash, Banks differential cover, Bilstein 5100 shocks, Morimoto xB headlights, tail lights and fog lights., Aug 12, 2022 · Postings of Tech Service info for any New L5P engine issues. , Feb 6, 2021 · 285 posts · Joined 2019. #39 · Mar 5, 2021. Got rid of that awful fuel filter system on the L5P and installed a Fleece filter delete. Easy enough, but for anyone doing it, don’t take the shield with the housing. All you need to do are the two 13mm bolts at the back, top/side. You’ll understand when you look at it. , 2018 L5P Exhaust Brake seems weak. I use my 2018 3500 SRW GMC Duramax as the tow vehicle for a 15000 lb 5th wheel trailer. I'm quite happy with it's performance over it's 16,500 miles so far. My question is about the exhaust brake, which doesn't seem to be as aggressive as my previous 2015 LML Duramax. Is there any …, Feb 2, 2017 · How It's Made: The Duramax Diesel Engine said: There are a number of things that make the DMAX facility different from other GM engine plants. The most significant is that it hot-tests 100 percent of the engines it produces. That means every 6.6L engine is run on a dyno before it ever goes in a truck. , 83 posts · Joined 2018. #4 · Jul 2, 2019. You are pulling way to much weight for your truck. The L5p was a very small exhaust side configuration, small up pipes, small exhaust turbo vanes, etc. So I am guessing the ECM was seeing some very high EGT’s and cut power to keep from melting pistons. Like., 2018 GMC Sierra 2500HD SLE L5P Duramax. Howdy! Just purchased my first Duramax last week, but I have always admired them since I began driving. I had a 2005 Sierra 1500 prior to this truck and it was always solid for me, but now that I have upgraded to the 2500 I must say I have been missing out! This new L5P engine is pretty darn impressive., I really depends on what you call "available". Sure, you can now delete an L5P, BUT, you have to do the computer swaps (ECM / TCM). This delete option is costing many $6k - $7k. It is not a viable option. Many such as myself are still waiting for the true tuning option that will eventually come along., 2017 GMC L5P Duramax - Quick Review. I got a new 2017 GMC 3500 SLT All Terrain HD with the L5P for a work/company vehicle recently and thought I'd share with you my experience with it so far in case anyone is interested. Before the trucks were purchased, all three brands were considered but we settled on GM's mostly due to pricing at the time ...