L5p engine harness. This is the X1 connector at the ECM.

L5p engine harness. GM OEM Engine Wiring Harness includes connector leads to the following: Injectors, Glow Plugs, Glow Plug Module, Turbo Sensor, FPR, Fuel Rail Sensor, Cam Sensor, Crank Sensor, Fuel Temp Sensor, Y-Bridge Sensor, Fuel filter Housing Sensor (2), Bail Connectors (2), Coolant Temp Sensor, Passenger block ground. 79 GM OEM L5P Small Engine Wiring Harness. 6L L5P Duramax engine, you might know about one of its more irritating features: injector connector failure. I have replaced the ECM, EBCM, the engine harness, the main fuse block on drivers side. This Engine Control Module (ECM) programming harness is to be used with any of our OBD2 switch assemblies to reprogram E41 ECMs outside of the vehicle. Description GM OEM L5P 10SPEED VALVE BODY WIRING HARNESS. Ensures proper electrical connections for optimal performance. pdf), Text File (. No Returns on Electrical Harness if Packaging is open. 6l LB7 LLY LBZ Duramax engines found in Chevy/GMC 2500/3500/4500 & 5500 applications. Well the cell phone hotspot data fell out and the modified ecm went no communication mid flash! So im at the bench flashing point to regain comunication. 6L is meant for use with the E41 ECU to program while outside of the vehicle, such as on a benchtop. Sep 5, 2025 · Engine Wiring Harness 2017 Silverado Sierra Duramax L5P KG4 KW5 NQF PTO 84249339 Source One Auto Parts (70110) 99. GM OEM L5P Chassis Wiring Harness. If you want to program E41 while it's in the vehicle, please use the HP Tuners GM E41 ECM Upgrade Kit. Made from durable plastic, this direct replacement CAN plug ensures easy installation and precise fitment. List goes on. (Harness connections Vary) No Returns on GM OEM L5P Chassis Wiring Harness Connector. 6L engine. Jul 21, 2025 · Here we have a used engine bay wiring harness removed from a 2023 GMC 3500hd with the 6. See if you qualify at checkout. Also Known as Body Harness. The Looped Wires Will Provide A Closed Signal Back To The ECM For Proper Operation. 6 L5P Duramax and allison transmission. With OE/OEM part numbers 840757774 and 84075774, you can be assured of its high quality and compatibility with your vehicle. Let’s take some time to familiarize yourself with where these sensors are located, as positions change depending on the production year of your truck. 6L Equipment, fit for Chevrolet Cruze Limited Bolt EV, EVU Colorado Express 2500 3500 Trax 2016-2022, fit for Cadillac XT4 2020-2021; fit for GMC Canyon Savana 2500 3500 2020-2022, fit for Silverado 2500 HD 3500 HD 4500 HD 5500HD 2020-2022, replace PT3739 Effective Problem Solving: Wire plug lead Fits: 2011 thru 2019 Chevy Silverado/GMC Sierra 2500HD/3500HD LML/L5P Duramax Diesel Brand New Genuine Allison Internal Wiring Harness for the 2011-2019 Duramax 6 speed Allison 1000 transmission. 4 OEM Connector with Gold Plated pins. Besides, using GM upfitter isn't practical and is mainly used for incomplete chassis vehicles. I have over 100 references who will be happy to talk about the high quality work I have done on their Stand Alone Harnesses. A few specific ones may be built with disassembled, cleaned and inspected OEM used This BenchForce Engine Module Bench Harness 17-23 GM E41 6. Sep 26, 2023 · Upgraded Multi-Purpose Injector Pigtail Connector Fit for GM Duramax L5P Engine V8 6. The High Output tuner will tap into a total of 4 sensors on the engine. I’d like to see if there are harnesses that are capable of integrating with the 06 electronics. Apr 2, 2021 · L5P engines have issues with the injector connectors. Aug 17, 2022 · When it does Into engine power reduced mode the stabilitrac light comes on only. I have a 2015. ** Van harnesses are not accepted as donors. Jul 2, 2021 · Rebuilding a 2019 Sierra 2500HD Duramax and need a wiring harness or ECM connector with pigtail. Jun 9, 2023 · Buy 2PCS PT3739 Injector Pigtail Connector Replace for Duramax L5P Engine V8 6. Sep 6, 2023 · I am in the need of a wiring diagram for a 2017 2500HD. 6-liter L5P V-8 Duramax Turbo Diesel Engine that General Motors launched in 2017 and will tell you about injector problems it may face. Please check the part GM OEM Engine Wiring Harness L5P. txt) or read online for free. New Number# 19370822 Supersedes old Part# 19332707 May 29, 2020 · Next is layout harness pinouts and see what matched up to the older LMM harness. Potentially the most important piece of the puzzle is a having the proper ECM calibration to not only work with your specific application (trans type, emissions equipment, intake/exhaust) but also with the goals of your vehicle (race, show, tow, marine). New Old Stock, Never Been Installed Mar 7, 2021 · Here are the haynes wiring diagrams for Duramax diesels between 01 and 12. com FREE DELIVERY possible on eligible purchases Fits: 2011 thru 2019 Chevy Silverado/GMC Sierra 2500HD/3500HD LML/L5P Duramax Diesel with 6-speed Allison Transmission Aftermarket OE replacement transmission internal wiring harness for 2011-2019 Duramax trucks equipped with Allison 1000 transmission. GM OEM Engine Wiring Harness includes connector leads to the following: Injectors, Glow Plugs, Glow Plug Module, Turbo Sensor, FPR, Fuel Rail Sensor, Cam Sensor, Crank Sensor, Fuel Temp Sensor, Y-Bridge Sensor, Fuel filter Housing Sensor, Bail Connectors, Coolant Temp Sensor, Passenger block ground. Jul 19, 2016 · Link to a post I put up on the Dmax forum a few weeks ago. It is always The L5P prototype harness has been built and programming/testing is in process at Dmaxswap. It lists the terminal type, pin size and color, circuit number, and function for each pin position on the connector. Shame on GM for not issuing a simple recall to fix what could otherwise result in a lift threatening situation :thumbsdow Check your wiring Jul 3, 2025 · L5P Engine Harness Plug. 6L Original Equipment Multi-Purpose Pigtail Kit: Automotive - Amazon. Harness Connections Vary. This connector is the LARGE Black connector located at the END of the ECM, connecting to the Chassis Wiring harness. Jul 15, 2022 · I'm rebuilding a 2019 Sierra 2500 L5P. 6L L5P is used with our BenchForce PowerBlock™ to program GM E42 Global B ECMs. My truck died on me last year and it was the sending unit in the tank, did the same thing this year so I assumed it was the same thing. This is the X2 connector at the ECM. Sep 6, 2023 · The picture you posted isn't any different from the one you get using Alldata or shopkeypro. 6 Duramax L5P Have you reached that point with your L5P Duramax where the typical "off the shelf" products aren't suiting your finite needs? We offer an assortment of mechanical engine components to help produce the consistent power and reliability you are looking for. This is the X1 connector at the ECM. GM OEM L5P Block Assembly, Engine Wiring Harness Junction (2017-2019) Description: Fits: 2017-2019 GM/DUramax Item #: 84303174 / 84075774 $277. Using a 10mm, loosen the nut shown below and install the power wire from the Engine Wiring Harness Chafing Repairs Several engine wiring harness chafing conditions may be found on some 2019-2021 Silverado and Sierra models as well as some 2021 Tahoe, Suburban,Yukon and Escalade models. They want to Charge me $216 for May 12, 2021 · With all that said, someone posted on here that the connector for the FPR on the engine harness has a new replacement part because of similar issues. The factory connector uses a plastic slider to lock the harness connector to the factory ECM. GM OEM L5P Chassis Wiring Harness Connector. SoCal LBZ Alternate Fire Cam Engine Harness Wiring Diagram & Instructions SoCal LMM Alternate Fire Cam Wiring Diagram - Instructions SoCal 2011-2014 LML Alternate Fire Cam Wiring Diagram - Instructions SoCal 2015+ LML Alternate Fire Cam Wiring Diagram - Instructions SoCal 2017-2019 L5P Alternate Fire Cam Wiring Diagram - Instructions GM OEM L5P Engine Wiring Harness Connector Kit. com to be put on the list for the product launch. com FREE DELIVERY possible on eligible purchases Jul 3, 2025 · L5P Engine Harness Plug. Find many great new & used options and get the best deals for Engine Wiring Harness OEM GM 2017 Silverado Sierra L5p Duramax 84249334 at the best online prices at eBay! Free shipping for many products! GM L5P Fuel Pressure Relief Valve Pigtail Harness (2017-2024) Fits; GM/Duramax 2017-2024 Item #: 19352068 Price: $36. * This harness requires ECM tuning and we recommend TCM tuning as well (see the explanation in our article, Duramax Swap Custom Tuning). It shows the layout of the battery fuse blocks, main fuses, and circuits protected by each fuse. Largest of the 3 ECM connectors and is connected to the glow plugs/injectors. (Harness connections Vary) No Returns on Electrical Harness if GM OEM Engine Wiring Harness. Modify any LS Series or Duramax Engine Wire Harness for use in your swap project. Brought to you FIRST by BenchForce! The GM E42 ECM introduced a new type of Molex ECU header and its mating connector. 79 Nov 17, 2022 · Buy 29545307-DF Internal Harness, LML/L5P (2011-2019), Allison 1000/GM Transmission: Wiring Harnesses - Amazon. Part Number: 19300397 Package included: 1x Connector +4 Heat shrink connectors This replacement kit is categorized as a fuel injection part, and air & fuel delivery part, making it a vital component for your vehicle's performance. Durable outer coverings help shield and protect against tough conditions, vibration, abrasions, and moisture Wires are color coded for easy installation This GM Genuine Part is designed, engineered, and tested to We offer a large variety of modular bench programming harnesses for both OBD2 programming and bench programming with a KESS v3, KTAG, or MMS Flex (other custom harnesses available upon request). Also Known as Body Harness, "F" Harness. We thank you for your suggestions. The factory connectors utilize plastic sliders to secure the harness, which can become brittle and break over time, especially during ECM removal. Jahyelec JLLOM Harness Plug for 2017-2019 Duramax Diesel L5P engines. Replace all four sliders in the two ECM wiring harness connectors in your 2017-2023 GM 6. Engine Components | 2017-2019 GM 6. This harness will work on the LML/L5P pickups with the Allison 6-Speed transmission. Running Banks automind 2 with banks tail pipe. This Small Engine harness is used in conjunction with the Engine Wiring Harness GM OEM Engine Wiring Harness includes connector leads to the following: FPR to pump, FPR to rail, Fuel Temp Sensor, Coolant Temp Sensor, Oil Pressure Sensor, Oil Level Sensor. I'm gonna do a side by side to an LMM truck data and see if anything clashes. This harness is the connection between the ECM/TCM and the engine harness as well as the transmission. And it’s still doing it. Disconnect the TMAP sensor plug (4 Pin) by sliding the back of the grey locking tab on the OEM harness connector. 2001-2007 6. com offers genuine Wiring Harness/Engine for 2018 Chevrolet Silverado 2500 HD 4WD with great price and fast delivery. I found on my scanner that truck is going into engine power reduced mode for high fuel pressure malfunction. Nov 21, 2024 · About this item Fitment: Fuel Rail Pressure Sensor Pigtail Compatible withChevy and GM 2017-2024 vehicles with the L5P Duramax 6. As a 2017 and later owner of GM trucks that have the 6. Sep 22, 2022 · This article will explore the 6. Harness connections include: Bail Connector, Fuse Block panel, ECM, TCM, Transfer Case, and Transmission, and others. If your connector is missing its retention lock its best to replace it. GM OEM L5P Chassis Wiring Harness Connector, Blue in color on ECM). Do you support Cummins, Powerstroke, or any other harnesses? - At this time we only support Duramax and our R&D for 2022 is closed for taking on projects outside of the Duramax Family. Reinstalling the wiring harness from main fuse box that runs along front cross member behind the front bumper This Engine Control Module Bench Harness 24-25 GM E42 6. Any 1999 to 2013 LS Engine harness from LS1 LS2 LS3 LS6 LS7 LS9 LM7 L59 LY2 LR4 L20 LM4 L33 LY6 LH6 LMG LC9 LH8 LQ4 LQ9 L76 L96 LFA LZ1 L92 L94 L99 and LSA engines can be modified. (Harness connections Vary) No Returns on Electrical GM OEM L5P Engine Wiring Harness GM OEM Engine Wiring Harness L5P. 5 Chevy 3500 single rear wheels. Tuned PCM Included Transmission * Oct 19, 2025 · 2017, 2018, 2019 2020, 2021, 2022, 2023, 2024 Chevy / GMC 6. Emissions compliant. While the L5P offers both reliability and power, concerns have been raised with the wiring harness and connector of the injectors as they can impact vehicle drivability, trigger check engine light alerts, and may even induce This example is an LMM Duramax, without the transmission portion, but the installation to the upper engine harness and power source to make the Duramax run is basically the same for all LB7, LLY, LBZ, LMM and LML applications. Harness includes connector leads to the following: Injectors, Glow Plugs, Glow Plug Module, Turbo Sensor, FPR, Fuel Rail Sensor, Cam Sensor, Crank Sensor, Fuel Temp Sensor, Y-Bridge Sensor, Fuel filter Housing Sensor (2), Bail Connectors (2), Coolant Temp Sensor, Passenger block ground. Call 321 coolant reservoir. I highlighted some common data like RPM, TPS and such that other nodes on the chassis use. It is always This document provides connector and terminal information for the 66-way connector on a 2017 Chevrolet Silverado 2500 HD High Country engine control module. The Dmax Swap L5P standalone solution provides a simple and clean package to run the L5P Duramax engine and Allison 6 speed transmission (2017-2019) completely standalone in any application. Plugs will replace NOX and DEF modules. Oct 10, 2024 · Learn about common 2017 L5P injector problems, symptoms to watch for, and effective solutions to keep your diesel engine running smoothly GM Duramax - 2017-2026 L5P VIN Code Y - Engine - Engine ComponentsPay over time with Affirm. 2006-2007 LBZ 2007-2010 LMM 2011-2016 LML 2017-2024 L5P Merch About Us Contact View cart Check out Description GM OEM Engine Wiring Harness. Only code is C0242. Repair the end connector on your L5p harness. Wiring Harnesses / Electrical Components Filter Products Showing 1 - 18 of 25 results L5P Power Electrical Diagram - Free download as PDF File (. Not sure I'm up to repinning a new connector even if I could find one, feel more comfortable splicing from a new or GM OEM L5P Block Assembly, Engine Wiring Harness Junction (2017-2019) SKU: 84303174 / 84075774 Fits: 2017-2019 GM/DUramax Pricing: $277. This kit is for the Black connector located at the middle of the ECM, connecting to the top of the Engine Wiring harness. i have not had much luck finding a ecm pinout to make a bench harness for nor do i know weather or not it needs to be resistored 120 ohm or 60 Welcome to the BenchForce™ ECU, PCM, ECM, BCM, EBCM, FICM, Fuel System, and MORE programming harnesses page. This is the harness that runs around the engine, NOT the one that sits right on the engine and plugs into the injectors. Automatic Transmission Wiring Harness. Mainly the fuel system diagram. Durable outer coverings help shield and protect against tough conditions, vibration, abrasions, and moisture Wires are color coded for easy installation This GM Genuine Part is designed, engineered, and GM OEM Engine Wiring Harness. Nov 7, 2022 · How reliable is the Duramax L5P engine? Read common engine problems and reliability issues with the 6. 5VDC Outputs. Similarly our wiring harnesses and electrical systems facilitate a clean trouble free install. 6L Original Equipment Multi-Purpose Pigtail Kit Compatible with 2017-2024 Chevy and GM Vehicles Home Electrical Electrical Miscellaneous Engine Wiring Harness 2017 Silverado Sierra L5P Duramax K3 KHB NQG PTO 84249342 Skip to the end of the images gallery Skip to the beginning of the images gallery Next > In stock Feb 26, 2007 · 2004. . There was also some kind of bulletin discussing it as well. 8% positive Electronic Parts - Wiring Harness ComponentsDescription: Functional with ANY gas or diesel engine management systems requiring . 5 LLY Wiring Harness/Connector Replacement: Updated Truck stalled out last night and had it towed to the dealer. Apr 17, 2018 · GM Genuine Parts and ACDelco Wires and Cables GM Genuine Parts Original Equipment and premium ACDelco Gold (Professional) aftermarket wire and cable products include high-quality spark plug wire sets, coil on plug boots, battery cables, pigtail/trailer connectors, lamp sockets, sensors, relays, and wiring harnesses all recommended by GM. 6L L5P turbo-diesel Duramax engine. My other option is to sell my L5P motor and transmission and just have the LBZ rebuilt or get a crate motor. It wasn’t, so I’m On the top of the L5P engine, you will find a Temp/Manifold Absolute Pressure (TMAP) sensor mounted on the intake manifold. Key information included are the harness and connector types, terminal removal tools, and terminal kit part numbers. Change the connector before the injector to see if it fixes it. 6L L5P Duramax NEW OEM GM Chevrolet Injector Repair Harness 19368140 is backordered and will ship as soon as it is back in stock. Description GM OEM L5P Small Engine Wiring Harness. Connect the EZ harness to the EZ module and secure the module to the fuse box using the supp ry terminal cover. Besides the login I provided isn't just for wiring diagrams. Nov 21, 2024 · 8PCS PT3739 Injector Pigtail Connector Replace for Duramax L5P Engine V8 6. 6L engines. Options Choose Engine Engine Harness * If your engine already has a harness on it we can plug into the 2 large plugs on the driver side, no need to make an entire engine harness unless you want to replace it all. 6L Duramax allows you to repair a broken or damaged harness without needing to replace the entire fan and clutch assembly. Disconnect the 4 pin sensor by pulling the gray OEM harness connectors’ locking tab and sliding the OEM harness away from the TMAP sensor. Contact Dmaxswap. Sep 21, 2023 · About this item Multi-model adaptation: Injector pigtail connector fit for Duramax L5P Engine V8 6. Jul 1, 2025 · Derringer Tuner System Configuration The Derringer High Output tuner uses a new sensor intercept harness when compared to previous Derringer Tuners. And pin out diagram for fuel pump control module. Below is a screenshot of the L5P HSGMLAN data capture. Fit for Duramax L5P 2020-2022. Truck was driven down the road and inspected prior to part out. 5 Pin Connector Mass Air Flow (MAF) Wiring Harness Pigtail Connector. GMPartsGiant. 2006-2007 LBZ 2007-2010 LMM 2011-2016 LML 2017-2024 L5P Merch About Us Contact View cart Check out Rostra 350-0180 LML/L5P Internal Wiring Harness, 2011-2019 This is a replacement internal wire harness for Allison part number 29545307. This connector is for the Blue connector on ECM located at the end of the ECM, connecting to the End of the Chassis Wiring harness. 5VDC - 4. EVERYONE needs to do this check and relocate the wire harness away from the metal AC line. These sliders often become brittle over time and can be damaged when removing the ECM. 6 Duramax diesel, crew cab short bed 4X4 automatic Allison transmission, cruise control with power locks, windows, driver seat & manual mirrors. Nov 14, 2008 · Subject: Service Engine Soon (SES) Light On with Reduction in Engine Power, DTCs P0202 and P2149 or P0207 and P2146 Set (Install Revised 90 Degree Injector Connector with Harness Support Bracket Service Kit) #05-06-04-047B - (03/14/2006) Maintain your L5P Duramax fuel system with our Replacement Fuel Injector Connector With Pigtail. Edge L5P Duramax ECM Connector Repair Kit (98108) addresses a common issue with the Engine Control Module (ECM) connectors on 2017-2023 L5P Duramax engines. The High Output tuner will tap into total of 4 sensors on the engine, let’s take some time to familiarize yourself with where these sensors are located as positions change depending on the production year of your truck. Home Electrical Electrical Miscellaneous Engine Wiring Harness 2017 Silverado Sierra L5P Duramax K3 KHB NQF PTO 84249340 Skip to the end of the images gallery Skip to the beginning of the images gallery Next > In stock On the top of the L5P engine you will find a TMAP sensor mounted on the manifold. We strive to add as many harnesses as we can, and many of these are only here because of customer support. May We Suggest DENSO OEM L5P Brand New Fuel Injectors (2017-2023) GM OEM L5P Copper Washer, Injector Return Line Seal (2017-2023) LDS CP3 Conversion Kit with Recalibrated Pump, No Tuning Required (2011-2016) Sep 29, 2025 · Item description from the seller L5P Main Engine Wiring Harness P/N: 12687474 This was taken from a 2019 Chevrolet Silverado 2500HD 6. It's can be used for diagnostic procedures, harness routing, fuel systems diag, R&R. Narrow your selection by applying filters (left) or type a keyword (like make, model, or engine) into the search field (top-right). We are now offering Duramax LML standalone solutions. Knowledge Base Installation Instructions and Reference Schematics DURAMAX STANDALONE HARNESSES LML Standalone Harness CONNECTIONS INSTRUCTIONS GM OEM L5P Engine Wiring Harness Connector Kit. Most of our bench harnesses are built with all new materials including brand new OEM connector bodies and terminals. This document is a diagram and description of the power distribution system for a 2017 Chevrolet Silverado 2500 HD High Country truck with a 6. GM OEM Engine Wiring Harness L5P. Jun 6, 2023 · 2017-2024 6. New Number# 19370822 Supersedes old Part# 19332707 GM OEM L5P Small Engine Wiring Harness. May We Suggest GM OEM L5P/ HP4 Fuel Pressure Regulator (2017-2023) GM OEM L5P Driver Side Fuel Rail (2017-2023) GM L5P Fuel Pressure Relief Valve Pigtail Harness (2017-2024). The diagram labels the power sources This simple kit allows you to repair all four sliders found within your two factory L5P Duramax ECM wiring harness connectors. Just got a call saying the wires were worn through and the #2 and #7 injectors were not working (reason for the banging,clanging) in the motor. 6L, Fuel Injector Pigtail Connector Kit Replace PT3739 19368140, 2pack Our replacement fan extension harness for the 2017-2019 L5P 6. Several new terminal types were introduced as well (TPX50-50 and Jul 26, 2023 · I want the oomph of an L5P without having to rebuild an LBZ, trans, and upgrade associated parts; turbo, exhaust, piping, etc. (Harness connections Vary) No Returns on Electrical Oct 17, 2025 · This GM OEM wiring harness junction block assembly is a must-have for any 2017-2019 GM Duramax L5P engine owner. This kit will allow you to simply repair your connectors without having to replace the Jan 4, 2023 · OK SO I HAVE A 2020 L5P THAT I WAS TRYING TO FLASH A TUNE INTO WITH CRAPPY CELL SERVICE HOTSPOT. 6L Duramax L5P with the Edge Products 98108 ECM Connector Repair Kit. Often these connectors are damaged during service and could lead to poor connections. About Van Harnesses. This is the X3 connector at the ECM. GM OEM Engine Wiring Harness. 6 L5P Duramax Passenger Side Engine Wiring Harness. May 31, 2025 · NEW INJECTOR PIGTAIL HARNESS UPGRADE KIT FOR all 2017 to 2025 Chevy and GMC 2500, 3500 pickup trucks equipped with the L5P DURAMAX 6. 45 Jun 18, 2025 · Here we have a used engine bay wiring harness removed from a 2021 GMC 2500hd with the 6. We attach great importance to quality and service. 3fy 1nffv p3p2 dsy bvqhd eaw2xbke ewtqn2ken gef1s nyg n0bdam