Feb 19, 2025 · Hearing chirps or squeaks from your GM 6.2L or 6.6L V8? Don’t worry—these engine noises are normal. Here’s why your truck sounds different.

Some 2020 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of …

Oct 4, 2021 · Brand new ‘21 Sierra Denali 3.0 diesel truck, going on 2k miles. Upon acceleration, the engine makes a pinging or knock noise. Sounds like a gas engine with low octane fuel. Dealer said …

Aug 9, 2023 · It now has 6,000 miles on it and makes a knocking or ticking sound while cold starting. I took it to the dealer and they said that this was the direct injection working under a cold start.

Jun 15, 2024 · I am speculating my 2.7 engine with 9k miles is ‘clogged’ and/or something is wrong as the engine sounds like its loud and rough and there is a heavy knocking sound when cold. Someone …

Oct 26, 2015 · this is a addition to my loss of power topic i posted the other day. i brought the truck ( 2015 2500 Hd 6.0) in to the dealer and theres no indication of any power loss. as far as the tapping …

Nov 6, 2018 · If engine replacement is necessary, there is no need to order an insert. The new engine will come with the oil filter adapter which has it installed already. If the insert is missing and no other …

May 22, 2024 · Have enjoyed this engine but I’m at a loss today. 2020 Silverado with 114k miles, engine began running rough, developed a knock and “Service Def System” reduced power popped up. …

Mar 7, 2020 · Picked up a 3L GMC Sierra last week and noticed after a short trip with 400kms on the truck it smelled like burning crap when we got home, I wonder if that’s a passive regen? i was …

Feb 16, 2026 · Get up to speed on GM’s rumored 5.7L and 6.7L sixth-gen V8s for the 2027 Silverado and Sierra, real power guesses, and how a plug-in hybrid 1500 could follow.