How to clear service def system message duramax - Feb 9, 2018 · 3) Mbrp down pipe (some say not a necessity) 4) Flo pro 5" straight pipe (of course you'll need a new exhaust) Now here's where it gets expensive: 5) Sportsman Cp3 conversion. 6) Fass titanium 165 lift pump. Two items you ought to consider if you haven't already. At the very least a lift pump.

 
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vehicle may require service. The light should come on to show that it is working when the ignition is on with the engine not running. See “Ignition Positions” in the owner’s manual. This light may also come on when the system has detected a problem with the Diesel Exhaust Fluid (DEF) management system. See Diesel Exhaust Fluid 0 11.Service emissions message. We've had our 2015 3500HD for about a year now. First diesel I've owned. Changed the fuel filter today for the first time. After taking quite a few times priming it is got it to start. Upon starting it now reads on the dash service emissions see owner's manual 175 miles until 65 mph max.Jan 17, 2021 ... ... clear the code and take a look at the data coming from the system via ... Duramax "Service Emission System" Part 2. Boatman Auto•2.8K views · ...To clear the DEF System Message in your Duramax truck, you’ll need to follow a few simple steps. First, you’ll need to understand what the message means and why it’s important to clear it. Next, you’ll need to gather the essential tools you’ll need to clear the message.Jan 17, 2021 ... ... clear the code and take a look at the data coming from the system via ... Duramax "Service Emission System" Part 2. Boatman Auto•2.8K views · ...Jul 1, 2022 · M. mschreib81 Discussion starter. 5 posts · Joined 2022. #1 · Jul 1, 2022. I purchased a 2022 GMC Sierra 3.0 AT4 refreshed on 5/31, it currently has 1700miles, 3 days ago on my way to work I got a check engine light and a notice to service emissions systems. Once at the dealer they told me that it was most likely due to using biodiesel and ... Service department runs test and installs a Reservoir Kit ($212.65) in the def tank and tests and clears all codes. Part&Labor= $451.36. Im happy, I pay and Im on my way thinking simple fix, not 10 miles down the road the Service Exhaust fluid system messages is back on. I would have turned around and went right back but had somewhere I needed ...In This video I go through all the steps to troubleshoot Poor Quality DEF Warning.A Duramax diesel vehicle may have the following additional DIC menu items: Exhaust Fluid Level : The Diesel Exhaust Fluid (DEF) level will be displayed as either OK, XX%, or LOW. When LOW appears on the display, add DEF as soon as possible. See Diesel Exhaust Fluid pg 37. These are from the 2018 that I had. Above about 30% it will say DEF Level OK.Junk hauling services are a great option if you’re looking to clear out junk and debris but don’t want to do the heavy lifting. This is a guide to finding the right junk hauling se...Dec 29, 2021 ... Code p2048 Testing and Replacing Cummins 6.7 DEF Injector | Ram 2500 Service DEF System Message ... def gauge and remove 5 mph limitation. Avoid ...Service emissions system. 165 miles till only 65mph, 2012 gmc 2500hd duramax, Went on Delco site. ... If you're a GM mechanic you would know that a 2012 Duramax Diesel does have a DEF tank intakes exhaust fluid and if you read the thread you would know it says Service emissions see owners manual now 165 miles to 65 mile per …Please subscribe for more. how to reset service light indicator ChevroletIn This video I go through all the steps to troubleshoot Poor Quality DEF Warning.Easiest way is to lower tank a bit to find the harness going to tank heater on top of tank. You find to wires coming out of the main def system harness leading to a two wire plug on top of tank. From the plug the wires continue to the sending unit. Unplug the plug and check resistance, if unusally high or an open is found it is bad.10. Jan 16, 2022. #1. Had the message Service Def System see dealer message pop up today while towing my camper home. Message stayed up for about 15-20 minutes then completely went away. Truck is a 2020 2500, 11K miles. I pickup it up Pre-Owned with 6500 miles on it. Since ownership for 1 month I’ve added 5 gallons of Platinum Blue Def and ...Allow the pressure to build for 30 s. Observe the scan tool Reductant Pressure sensor parameter. The reading should be between 425-575 kPa and there should be no leaks in the system. 6. Engine idling, command each GPCM Reductant Heater 1, 2, and 3 ON for 10 seconds with a scan tool. The DEF lamp should turn OFF.DEF Pump Pressure: Observe the DEF Pump Pressure parameter on the scan tool. The DEF Pump Pressure parameter should always be at 500 kPa (+/− 10 kPa) when the RFQT is running. Use the scan tool to monitor the DEF Pump Pressure parameter. It must remain within the specified range.In today’s competitive business landscape, it’s more important than ever for companies to have a clear and compelling message that resonates with their target audience. This is whe...Check 4: Bad Diesel Engine Fluid. It’s time to go through the diesel engine fluid reservoir and check Whether there is any defect or not. Solution: Once it is contaminated, you have to change the fuel filters and injectors. Besides, give a check over the HP fuel pump.There are four primary emissions systems on the L5P. EGR, DOC, SCR, and DPF. All of these systems with the exception of EGR sit within the exhaust system. Deleting the L5P DPF will remove not only the DPF but also the DOC and SCR components, and the need for DEF fluid. The EGR must be deleted separately.Feb 23, 2022 · Adding a tuner is going to add another $900-$1,500 to the price tag. Therefore, a full delete is going to run somewhere between $1,200 and $2,500 depending on the route you go. How to delete your 6.6L Duramax LML DPF system, including benefits, downsides, performance gains, and more considerations for deletes. Last weekend I got the "Service Emission System" message and the Check Engine light came on. ... got a message to service DEF system. Dealer found shorted DEF tank ...February 10, 2021. The Emission Reduction Fluid Tank heater may be faulty on some 2020 Silverado 1500, Silverado 2500HD/3500HD, Sierra 1500, Sierra 2500HD/3500HD; 2021 Tahoe, Suburban, Yukon and Escalade models equipped with the 6.6L Duramax diesel engine (RPO L5P) or 3.0L Duramax diesel engine (RPO LM2). If …3.Remove the Q61 emission reduction fluid injector from the exhaust pipe leaving the reductant line and electrical connector connected. Place the Q61 emission reduction fluid injector into a suitable container. 4.Ignition ON, command the Reductant System Leak Test ON with a scan tool.Yes, I am aware of the terms and processes along with my own states law as it's not the first one I have had to pursue lemon law on either. Back on topic, still looking for a programmer that is able to clear DEF/emissions codes. 2012 GMC 3500 SRW, Crew long box, Rancho 4in, 285/75/18 Nitto G2's, LEER shell, Fab Fours bumpers, deletes coming ...Aug 11, 2023 ... Customer states service exhaust fluid system message ... How to: DPF/DEF DELETE 2.8L Duramax Chevy Colorado ... Diesel Exhaust Fluid Tank ...Sometimes it can take several miles of driving and/or several restarts for the system to reset. There was a reset programming problem on the 2011's, but that should not be the issue with your 2013. 2023 LZO Sierra 4x4 crew 6.5 box. Sold 2021 LM2 Sierra 4x4 crew 6.5 box, 2018 L5P Sierra 4x4 SB, 2011 LML Sierra 4x4 CCSB, 2010 LMM, 2004.5 LLY.In the US the federal requirement is for emissions controls to be warrantied for 7 years or 120,000 miles and this applies to anything involving the DEF system as well as the NOx sensors and EGR and related components. Problem is finding a competent diesel mechanic at a Chevy dealership.Check 4: Bad Diesel Engine Fluid. It’s time to go through the diesel engine fluid reservoir and check Whether there is any defect or not. Solution: Once it is contaminated, you have to change the fuel filters and injectors. Besides, give a check over the HP fuel pump.vehicle may require service. The light should come on to show that it is working when the ignition is on with the engine not running. See “Ignition Positions” in the owner’s manual. This light may also come on when the system has detected a problem with the Diesel Exhaust Fluid (DEF) management system. See Diesel Exhaust Fluid 0 12.The def system has a lot of variables. The biggest thing I have seen is to make sure that you fill it with the key off. ... The dealer said it will probably give me the need def message at about 6000 miles. It is hard to get a definite answer. The book doesn't seem very clear about it. ... Duramaxdiesels.com was founded in 2006 and created a ...Jan 4, 2023 ... Installing the DEF tank assembly on a 2020 GMC 2500hd. Applies to 2020-2022 GMC and Chevy trucks with the Duramax.Condition/Concern: A dealer may encounter a customer concern of an Exhaust Fluid Quality Poor message displayed on the DIC. The dealer may or may not find DTCs stored. An Exhaust Fluid Quality Poor message can be displayed with no DTCs. The Exhaust Fluid Quality Poor DIC message notifies the customer that the ECM has detected a drop in the SCR ...Apr 4, 2019 ... In this video I preform a DEF Level reset on this 2011 GMC. This is a fairly common issue on these trucks and a pretty easy fix. -Enjoy!CEL , service emissions, 160 miles to speed limiting . Def Guage on the dash read 3/4 full . Out of desperation , stopped and bought more fluid . About a gallon to top it off . Drove it 240 miles home , no issues , CEL off . Dealership checked it out , ordered a new tank . Told me to keep the def tank full until the new part arrives.A system tamper service bay test might clear it. Do a manual regeneration clean it up. Then it has to pass a DEF fluid quality test. If you can keep driving it, the ECM will run the tests and either clear the message or turn the light back on. It has to see the system working normal for the message to clear.You will first need to disconnect the battery wires and then remove the cover of the CCU. Once in, use a multi-meter to check for voltage at pins J1 (map sensor), B1 (engine control module or ESM), and K1 (fuel injection). If any of these readings are low, then you will need to clear the code by removing and replacing resistor R3.Tech. The Reductant Warning Service Bay Test is what we usually run once we’ve fixed the vehicle, DTC’s cleared and all that remains is a warning message on the DIC. Usually when a service emission system warning message came on. But hopefully in your case it has fixed the truck and there won’t be anymore problems.A DEF delete, also known as DEF removal or DEF bypass, is a modification performed on diesel engines to disable the DEF system. This involves removing or disabling components related to DEF injection, such as the DEF tank, DEF injector, and associated sensors. By doing so, the engine no longer requires DEF injection, and the owner no longer ...12 posts · Joined 2016. #9 · Nov 27, 2016. Make sure you shut it off when you add def. I be had a 13,15,and now16 and never had problem until 16 I started filling def while idiling. Blew computers mind, had to take it to dealer to clear and reset and informed me to always shut it off. It helps sensors reset and register the def level quicker.6.5L Diesel Engine Duramax First Generation: 2001-2004 (LB7) Duramax Second Generation: 2004.5-2005 (LLY) 6.2L Diesel Engine Fuel System, Air, Exhaust & Emissions Upgrades Top Contributors this Month View AllMar 1, 2023 ... 5 NEW Ways to Remove a ... DEF Injector | Ram 2500 Service DEF System Message ... Def exhaust fluid - FYI - 2021 Chevrolet [ p21DD code Duramax ]. The Duramax diesel engine available on 2011-2016 GM full-size trucks and vans requires injection of Diesel Exhaust Fluid (DEF) as an integral part of the exhaust after-treatment process that reduces emissions. DEF is a colourless, clear solution of water and nitrogen-based urea product that has 32.5 percent urea by weight. Reductant tank heater 1 is a common failure causing vehicle to enter limp mode, requiring DEF tank reservoir replacement.Duramax P21DD P20B9#automotive #cars...Removing Water from the Fuel Filter. To drain water: 1. Turn the engine off and apply the parking brake. 2. Place a container under the filter drain valve. The filter drain valve is on the bottom of the fuel filter. The filter drain valve is under the vehicle on the driver side, inside the frame rail.Checking your voice mail is important when you are on the go and want to stay in touch with friends, family or business contacts. You might be concerned that checking for messages ...In today’s digital age, where communication happens predominantly through online channels, the importance of clear word pronunciation cannot be overstated. Clear online word pronun...20 posts · Joined 2014. #6 · Feb 16, 2021. I got the same message the other day and truck went into “limp mode” DIC says service emission system. Checked for codes and got P0106. MAP/ barometric pressure. I spoke to service this AM and was told it has to do with the placement of the sensor.Dec 31, 2021 ... How to reset DEF message on a Dodge Ram (2016) with a Cummins Diesel Engine. The Service DEF System Message or P202e Code is a genuine game ...2011 DEF issues. This truck is a 2011 with 24K miles as it is one of my vehicles used only to move the 5th wheel to and from our property or hunting season for the boat and gear. Friday After about 2 hours of driving the "service DEF" light came on at the same time as the "Service Engine" light. The display says "service Required see owners ...Nov 22, 2015 · 1386 posts · Joined 2015. #8 · Nov 22, 2015. its almost guaranteed sensors on a 2011. They can force a regen at the dealership to burn off whats in the DPF. 2016 GMC 3500HD Denali CCLB - 27,035 miles. 2015 GMC 2500HD SRW/CCLB 39,368 miles- SOLD. 2011 CHEV 2500HD SRW/CCSB 133,597 miles - SOLD. The heater circuit is now open so i repaired it myself and reset the codes. I still can't get the service def system to go away. The truck is now in limp mode and has no codes. Any idea how to get it reset without a tech2.Environmental management systems (EMS) are crucial for organizations aiming to reduce their environmental impact and operate sustainably. Before embarking on the implementation of ...Jan 18, 2024 · A contaminated diesel exhaust fluid (DEF) system can be cleared using a vinegar solution. Meanwhile, this is how to clear the service exhaust fluid system in your truck: Mix 1 part of vinegar with 3 parts of water. Then, pour the solution into the diesel exhaust fluid tank. To clear the Service DEF System message on a Duramax, you will need to refill the Diesel Exhaust Fluid (DEF) tank. This can be done by adding a suitable DEF solution to the tank until it reaches the required level. Ensuring the proper functioning of your DEF system is crucial for your vehicle’s performance and emissions control.EMPTY message appears, it may. take several km/miles for the DIC. message to update. If the vehicle speed has been. limited and DEF has been added, it may take up to 30 seconds. after engine start with the vehicle. stopped for the EXHAUST FLUID. EMPTY message to clear.158 posts · Joined 2021. #13 · May 4, 2022. The DEF sensor inside the tank is known to have issues. Mostly due to DEF crystallizing and giving false info to the sensor. And depending on how much DEF you have in the tank at that moment, the crystal might dissolve and clear the code. Sometimes it doesn’t.DEF Pump Pressure: Observe the DEF Pump Pressure parameter on the scan tool. The DEF Pump Pressure parameter should always be at 500 kPa (+/− 10 kPa) when the RFQT is running. Use the scan tool to monitor the DEF Pump Pressure parameter. It must remain within the specified range. Got called in to a shop 2 hours away to look at a 2012 GMC Duramax Diesel that is stuck in LIMP MODE due to an Emissions System fault.Shop owner already repl... 2011 Diesel Exhaust Fluid (DEF) DIC Messages: Service Exhaust Fluid System (Tamper): This message displays when a DTC sets related to the DEF system that is interpreted as tampering with the system. A detailed warning strategy is explained in SI Document 2410875. Exhaust Fluid Quality Poor: This message displays when the exhaust fluid is of ...February 10, 2021. The Emission Reduction Fluid Tank heater may be faulty on some 2020 Silverado 1500, Silverado 2500HD/3500HD, Sierra 1500, Sierra 2500HD/3500HD; 2021 Tahoe, Suburban, Yukon and Escalade models equipped with the 6.6L Duramax diesel engine (RPO L5P) or 3.0L Duramax diesel engine (RPO LM2). If the Emission Reduction Fluid Tank ...566 posts · Joined 2013. #2 · Apr 12, 2018. If the pump module was replace, you need to perform the Tech-2 Reductant System Reset. Each one of the three DEF heaters needs to be commanded on for 10 seconds. 2013 Chevrolet 2500HD LTZ Z71.Delete the highlighted code and start the vehicle. The warning message should be gone. If the warning message does not disappear after starting the vehicle, turn the engine ON and OFF five to six times. You can then clear the codes again. This is a first-aid remedy and should let you reach the dealer.2010 (Vans with LHG only) and 2011 Diesel Exhaust Fluid (DEF) DIC Messages: Service Exhaust Fluid System (Tamper): This message displays when a DTC sets related to the DEF system that is interpreted as tampering with the system. A detailed warning strategy is explained in SI Document 2410875. Exhaust Fluid Quality Poor: This message displays ...1. Collect a DEF sample of about 150 ml (5 oz.) from the DEF tank in a clear container. The DEF sample should be clear with no obvious coloration when held up to a light. As clean DEF is clear, contamination by any common automotive fluids will cause the DEF to exhibit a trace of color associated with a specific contaminate.The apparent problem resolution flowchart dictates 1. re-flash the computer (due to being programmed to be overly sensitive), 2. Replace DEF system reservoir which also contains all dispensing mechanisms (which assumes that the DEF fluid is not being sprayed into the exhaust stream in adequate amounts or manners), 3.158 posts · Joined 2021. #13 · May 4, 2022. The DEF sensor inside the tank is known to have issues. Mostly due to DEF crystallizing and giving false info to the sensor. And depending on how much DEF you have in the tank at that moment, the crystal might dissolve and clear the code. Sometimes it doesn’t.Though the P20EE code Duramax doesn’t cause any immediate issues, you shouldn’t ignore it for too long. If the faulty DEF system or NOx sensor triggers the code, your car may fail the emission test and you experience reduced engine performance. It can be extremely irritating if your car activates limp mode due to the p20EE code.Jun 29, 2017 · 64 posts · Joined 2012. #1 · Jun 29, 2017. OK, Message on dash says to service DEF system, 147 kilometers until reduced max speed 105 km/h. Code P20b9 shows up on the scanner. I'm 275 kms from home. So finished the trip, in limp mode and took it to the dealer who informed me that my extended warranty does not cover the DEF system PERIOD! May 14, 2020 · At least I would have filled some fluid into the tank before going to the dealer, just in case. I have a 2012 Duramax, and when my "service exhaust fluid" message came on, I actually had enough DEF in my tank. The dealer checked and it was due to a bad DEF heater. The DEF systems have been notorious for problems. A system tamper service bay test might clear it. Do a manual regeneration clean it up. Then it has to pass a DEF fluid quality test. If you can keep driving it, the ECM will run the tests and either clear the message or turn the light back on. It has to see the system working normal for the message to clear.Apr 18, 2021 · In This video I go through all the steps to troubleshoot Poor Quality DEF Warning. In This video I go through all the steps to troubleshoot Poor Quality DEF Warning.Jun 26, 2020. #6. A Reductant System Malfunction Service Bay Test is required when the Service Emission System message or Service Exhaust System message is displayed on the driver information center (DIC). Not sure what scan tool you have but this is the test I run to clear the messages after replacing a DEF heater. D.4 posts · Joined 2016. #1 · Nov 23, 2021. Service message came on along with CEL. Had codes P20B9 & P21DD. Replaced def tank heater assembly. Cleared codes and still have service message and counting Down to 65 mph speed limit. Pulled battery cables for 30 minutes and drove truck for 20 miles.Adding a tuner is going to add another $900-$1,500 to the price tag. Therefore, a full delete is going to run somewhere between $1,200 and $2,500 depending on the route you go. How to delete your 6.6L Duramax LML DPF system, including benefits, downsides, performance gains, and more considerations for deletes.15 posts · Joined 2015. #1 · Sep 23, 2015. I've read a lot of conflicting information about the legality and consequences of doing a def delete. The most authoritative info I found was on some epa (or other government site) that said tampering with factory emissions was illegal for street vehicles and permissible only for off road …Feb 18, 2019. #1. Having a problem with my def system have a efi live tune in my LML started to show a service emission system code now cleared it a couple of times before. My question is anyone out there with a def delete tune it's for off road use only . Plan on putting a down pipe n 5 in exhaust system on it in very near future all help is ...15 posts · Joined 2015. #1 · Sep 23, 2015. I've read a lot of conflicting information about the legality and consequences of doing a def delete. The most authoritative info I found was on some epa (or other government site) that said tampering with factory emissions was illegal for street vehicles and permissible only for off road …A Duramax diesel vehicle may have the following additional DIC menu items: Exhaust Fluid Level : The Diesel Exhaust Fluid (DEF) level will be displayed as either OK, XX%, or LOW. When LOW appears on the display, add DEF as soon as possible. See Diesel Exhaust Fluid pg 37. These are from the 2018 that I had. Above about 30% it will say DEF Level OK.Nov 18, 2023 · There are four primary emissions systems on the L5P. EGR, DOC, SCR, and DPF. All of these systems with the exception of EGR sit within the exhaust system. Deleting the L5P DPF will remove not only the DPF but also the DOC and SCR components, and the need for DEF fluid. The EGR must be deleted separately. Resetting the DEF. So I have a 2012 Duramax. The DEF fluid got low. It read 200 miles remaining. So I put more DEF fluid in. It held 1.5 gallons. Which is not enough to fill the tank on that. Still reads 200 miles remaining. I have tried resetting it via the check button that resets everything else but no luck.15 posts · Joined 2015. #1 · Sep 23, 2015. I've read a lot of conflicting information about the legality and consequences of doing a def delete. The most authoritative info I found was on some epa (or other government site) that said tampering with factory emissions was illegal for street vehicles and permissible only for off road …The Secure Sockets Layer / Transport Level Security system that underpins secure connections on the Web does more than just scramble information. It also checks the identities of s...2011 Diesel Exhaust Fluid (DEF) DIC Messages: Service Exhaust Fluid System (Tamper): This message displays when a DTC sets related to the DEF system that is interpreted as tampering with the system. A detailed warning strategy is explained in SI Document 2410875. Exhaust Fluid Quality Poor: This message displays when the exhaust fluid is of ...Jan 2, 2017 · Returned from 5th visit to dealer for "Service Exhaust system". Did replace the DEF injector and last visit 2 nox sensors but tech couldn't get codes cleared even with GM support. Kept at dealer for 3 days and finally codes cleared on their own and dealer said take home for now. Not sure what to expect. Hard to take out of town when same issues ...

Message was still on the DIC, but I drove around gently for about 20 miles, without the trailer, and the DEF quality message disappeared. The DEF quality issue ONLY comes on for me on a long trip while towing. Watching the NOx1 and NOx2 sensor levels (OBD Fusion app), it looks like the DEF system is just completely overwhelmed during a long .... Joann fabrics and crafts vancouver wa

how to clear service def system message duramax

Jun 26, 2020. #6. A Reductant System Malfunction Service Bay Test is required when the Service Emission System message or Service Exhaust System message is displayed on the driver information center (DIC). Not sure what scan tool you have but this is the test I run to clear the messages after replacing a DEF heater. D.2011 Diesel Exhaust Fluid (DEF) DIC Messages: Service Exhaust Fluid System (Tamper): This message displays when a DTC sets related to the DEF system that is interpreted as tampering with the system. A detailed warning strategy is explained in SI Document 2410875. Exhaust Fluid Quality Poor: This message displays when the exhaust fluid is of ...Text messaging is pretty expensive, but fortunately there are a number of great alternatives for your iPhone that will provide the service for free. Of all the options, our favorit...A 2012 GMC 2500HD with a LML (160,000KM on engine). I had just recently replaced the coolant o-ring in the flywheel housing cause one was leaking coolant. Once the repair was complete the service emission system message appeared in the IP but no codes are set. A successful service regen was done with a tech 2, and no codes set during or after ...Tech. The Reductant Warning Service Bay Test is what we usually run once we’ve fixed the vehicle, DTC’s cleared and all that remains is a warning message on the DIC. Usually when a service emission system warning message came on. But hopefully in your case it has fixed the truck and there won’t be anymore problems.FOR COMPLETE KITS IN THE STATES CLICK HERE https://shrsl.com/3te1mFOR COMPLETE KITS IN CANADA CLICK HERE https://www.dirtydieselcustom.ca/ and use DARKIRON5 ... The Duramax diesel engine available on 2011-2016 GM full-size trucks and vans requires injection of Diesel Exhaust Fluid (DEF) as an integral part of the exhaust after-treatment process that reduces emissions. DEF is a colourless, clear solution of water and nitrogen-based urea product that has 32.5 percent urea by weight. Jul 1, 2022 · M. mschreib81 Discussion starter. 5 posts · Joined 2022. #1 · Jul 1, 2022. I purchased a 2022 GMC Sierra 3.0 AT4 refreshed on 5/31, it currently has 1700miles, 3 days ago on my way to work I got a check engine light and a notice to service emissions systems. Once at the dealer they told me that it was most likely due to using biodiesel and ... 2011 Diesel Exhaust Fluid (DEF) DIC Messages: Service Exhaust Fluid System (Tamper): This message displays when a DTC sets related to the DEF system that is interpreted as tampering with the system. A detailed warning strategy is explained in SI Document 2410875. Exhaust Fluid Quality Poor: This message displays when the exhaust fluid is of ...A contaminated diesel exhaust fluid (DEF) system can be cleared using a vinegar solution. Meanwhile, this is how to clear the service exhaust fluid system in your truck: Mix 1 part of vinegar with 3 parts of water. Then, pour the solution into the diesel exhaust fluid tank.Reductant tank heater 1 is a common failure causing vehicle to enter limp mode, requiring DEF tank reservoir replacement.Duramax P21DD P20B9#automotive #cars...This is my second Silverado 1500 with the 3.0 Duramax. First one was a 2020 and the truck was awesome and never ever had any problems. I traded it at 65,000 miles for a 2021, the 2021 has problems. At random distances I am getting "Service DEF System" and the truck starts slowing itself down. The truck has 21,000 miles on it now..

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