Oct 15, 2025 · L5P Loud vibration when towing up hill larry.hayes.75 Oct 15, 2025 Replies 7 Views 133 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 …

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 …

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 …

Jul 23, 2023 · And there’s been lots of software glitches in the infotainment system, locked black screens, GPS issues, map issues, and when I’ve used the new system it seems really slow to …

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 …

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 …

4 posts · Joined 2018 #17 · Jun 6, 2018 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 …

Nov 5, 2019 · P228C Possible Causes Clogged or Damage Fuel Filter Faulty Fuel Pressure Regulator Faulty Fuel Pump Faulty Fuel Pressure Sensor 2020 GMC Sierra SLT 3500 CC/SB …