Oct 15, 2025 · L5P Loud vibration when towing up hill larry.hayes.75 Oct 15, 2025 Replies 7 Views 133 Oct 17, 2025

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 …

My 2017 L5P has been shooting P228B P228C when I'm towing pulling up in the hills. It's been to the dealership 3 times for the same reason and they kept saying everything is fine. lol so today …

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 …

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 …

Jun 6, 2024 · My truck is throwing a code for the Bank 1, sensor 1 NOX sensor. (Code # P2A00) Chevrolet is out of them nationwide and cannot give me any information on when they will get …

Sep 9, 2022 · I recently bought an 2017 L5P that had been deleted but possibly not done correctly. i have a service emission system, see owners manual code come up but no check …

Mar 27, 2019 · So how hard is it going to be to make an l5d in the new medium duty produce the same power as an l5p? I assume the turbos will need swapped and a tune. Would one be able …

May 29, 2020 · I'm gonna toss this here since it's currently a technical study. But hopefully this helps with stand alone and engine swaps going forward. So please add anything of value …

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 …