Nov 17, 2025 · L5P Loud vibration when towing up hill larry.hayes.75 Oct 15, 2025 Replies 7 Views 159 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 …

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 …

May 2, 2018 · New 3500 Denali bought new about 2 months ago. It has 1800 miles on it. while getting on the freeway at 35-45 mph relatively light acceleration truck stumbles I cant tell if its …

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 …

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 …

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.

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 …

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 …