Muffler isn't original on truck

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! If your 2009 GMC Sierra 1500 is roaring like a lion when you'd prefer it purr like a kitten, it sounds like you need a quieter muffler. The original equipment manufacturer (OEM) muffler is designed to provide a balance of performance and noise reduction, so going back to an OEM or equivalent muffler is a good bet for a quieter ride. Aftermarket options can vary widely in sound levels, so if you're looking for peace and quiet, stick with OEM or a reputable brand known for noise reduction. A local auto parts store or dealership can help you find the right match for your truck. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.