Dec 3, 2025 · L5P Loud vibration when towing up hill larry.hayes.75 Oct 15, 2025 Replies 7 Views 175 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 whole nine, crank …

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 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 maf sensor …

Dec 22, 2024 · Want to start a thread of how many miles are in your L5p and what serious issues have you had with it. I’ll start 2019 L5p with 109k miles have not had any issues with it so far.

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 back to the …

2018 L5P 117 Miles Injector 3 Problems Just took delivery of my 2018 Chevy 2500 LTZ L5P. I put 60 miles on the truck before the CEL came on after I hit the remote start from a restaurant celebrating …

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 have an …

Jun 10, 2021 · Wondering if any of you l5p gurus have some failure analysis input for me.So this truck came to me with a miss on one cylinder and a pop out of the intake,pulled the valve cover and found …

Jan 25, 2018 · What do we know about these new LP5 injectors? I was doing some browsing last night and came across a site selling stock GM LP5 injectors. 1500 dollars plus 800 dollar core charge for a …