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Found 2 results

  1. Alright, before you say you don’t hear anything let me explain first. This video posted below is my 2021 Trail Boss 3500k miles and has the most annoying exhaust sound. I know there’s some serious pro’s on here who could tell me what’s going on. Essentially any time I start it up high RPM, accelerate, or decrease RPM’s I’m greeted with this annoying metallic rattling noise coming from exhaust. Took it to dealer who claims it’s normal (per-usual) and says it’s the liters I can hear in the exhaust tone. They checked exhaust donuts and heat shields and found no issue. However you can hear a rattle and what sounds like an exhaust leak. Was told it’s a flapper but it’s not, flapper is toward back passenger side. This is front passenger side. I could best describe it as escaping air coming from somewhere near the manifold I’d assume. Almost like a metallic farting exhaust noise for lack of better description. Videos to follow of noise while commuting.
  2. I’m new here so thank you for your patience. I bought a new 2018 Sierra SLE 4WD Crew Cab in November 2017. Within a few months of ownership, I began to notice what sounds like exhaust noise from the drivers firewall/floor area when feathering the gas at various speeds. It’s especially apparent in 4 cylinder mode but I hear it in both modes. It’s driving me absolutely nuts. The dealer says that there is nothing wrong and it’s just lifter noise. Thoughts?
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