Free wiring diagrams | Chevy and GMC Duramax Diesel Forum
Sep 6, 2023 · I need a diagram for a 2019 gmc sierra 3500 duramax on how the right rear window switch would interconnect with the BCM and with the driver window switch. My right rear window isnt …
CAN bus network faults - Chevy and GMC Duramax Diesel Forum
Feb 25, 2025 · Having a rough time sorting this one out without an oscilloscope. A point in the right direction would be appreciated. This truck is a 2004.5 LLY. —Checked and cleaned both the G200 …
2011 LML CanBus Issues - Chevy and GMC Duramax Diesel Forum
Nov 1, 2023 · When the bus is down I get only a trace voltage on either wire, resistance across ranges from 62 - 70 ohms. Now I pushed truck into heated shop overnight and it starts, voltage on 6 & 14 is …
Loosing communication, short? Bad ECM? - Chevy and GMC Duramax …
Aug 3, 2021 · He has the following 3 codes: U0073: Control Module Communication Bus Off U0100: Lost Communication with ECM/PCM U0121: Lost Communication with ABS Control Module The first …
Need help! 20’ GMC Sierra AT4 2500HD active grille...
Oct 25, 2024 · Need help! 20’ GMC Sierra AT4 2500HD active grille shutter issue - Code U1345 1 reading Jump to Latest 3.2K views 4 replies 4 participants last post by mwindel Jan 16, 2025
LLY Glow Plug Control Module Problems - Chevy and GMC Duramax …
Nov 14, 2024 · Mechanic replaced my glow plugs on my 2004.5 LLY last spring and discovered the glow plug control module (GPCM) was not activating the glow plugs. So, of course he replaced the …
L5P Service Emissions System Message - Chevy and GMC Duramax …
Apr 29, 2025 · I went ahead and cleaned out all connections related to the problem including, Can Bus Plugs, Driver Fuel Pump Control Module, Turbocharger etc. After this, I found one Can bus plug that …
Anyone need wiring diagrams for free? - Chevy and GMC Duramax …
Dec 26, 2020 · New thread allows you to search for diagrams without the need of me. I would like to say thank you to everyone on this forum. I was 16 years old when I started this thread and now have …
OBD port not working, but has power - Chevy and GMC Duramax …
Jul 1, 2025 · I have tried several of my readers and each one times out after a while. One says there is no communication with the ECU. Power is there. Any ides where to start? I searched for some …
L5P Battery Wiring | Chevy and GMC Duramax Diesel Forum
My personal truck is a 2007 GMC Sierra LBZ CCSB 4x4 with HSP piping, Danville 68stage2r turbo, PPE manifolds and up-pipes, Limitless 1078 TC, Stock trans with Trans Go Jr. and Ratio Tech kit.