Oct 15, 2025 · L5P Loud vibration when towing up hill larry.hayes.75 Oct 15, 2025 Replies 7 Views 145 Oct 17, 2025

Apr 24, 2025 · I have a 2017 L5P, it’s deleted and tuned. Had a head gasket failure. Ran fan coming in my shop started great, sounded great etc. get the cab back on, plug everything up …

Sep 27, 2024 · It was wrecked, it’s possible the doc or dpf or scr are broke and plugging the exhaust. After driving that first few miles it started plugging all flowing holes up. What’s your …

Dec 23, 2024 · I have a 2017 2500HD LT L5P with a "DEF EMPTY" issue which the tank is COMPLETELY FULL. WTFO? The DEF pump was just replaced 5 months ago and has been …

Sep 7, 2021 · I bought a used 2018 2500HD Duramax L5P and a week after owning got a reduced engine power warning and got it scanned and received the P0191 code and took it …

Feb 23, 2023 · I just purchased a 2018 L5P with 184k mi. I have a 'Service Exhaust Fluid System' message; followed by 'See Owner's Manual Now'; then '58 Miles Until 65 mph Max Speed'. I …

Oct 6, 2020 · 4000 Kms and the check engine light comes on. Diagnostic says the #8 injector needs to be replaced and 2 others are questionable. Coincidentally met another guy with the …

Jan 3, 2025 · Did you install another factory fuel pump, or an aftermarket lift pump? I'm looking for a high-capacity factory replacement. 2024 Chevrolet 3500HD Z71, LTZ, 4x4, 6.6 ltr. L5P long …

Jan 30, 2025 · '17 l5p LTZ okay so at first it was giving me a little starting issues but day or 2 after it just would not start back up.. I cracked a hp line at the rail during prime closed her up and …

Oct 28, 2024 · Injection pigtails connectors are a known issue with the L5P. Somewhat similar to the LLY issue. And too much slip in either the TCC or any clutch will cause the ECM to pull …