The muffler of any exhaust system has the biggest effect on the exhaust note you hear, and the 1999-2017 GMC Sierra mufflers offered by AmericanTrucks are chosen to make everyone within hearing sit up and take notice. A deep, growling, commanding note is what you can expect from most of these mufflers, which are also tuned so that your cab will remain free of droning and high-pitched noises. Generally made out of high quality stainless steel with extra-strong, welded seams that won’t leak even under the pressure of a boosted air and exhaust system, these mufflers are designed to work over the long haul and often come with a limited lifetime warranty. They’re also high flow designs, with offset/offset, offset/center, and center/center piping choices, which will fit in with an aftermarket cat-back to produce greatly improved scavenging from the cylinders – putting even more pep in your Sierra.
Shop All Truck Performance Mufflers
Fitment Includes:
- 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 and 2024 Sierras
- Base, C3, Classic, HT, Hybrid, Nevada Edition, SL, Z71, Denali, SLE, 1500, SLT and WT Sierras
- Engines: 4.3L Vortec V6, 4.8L Vortec V8, 5.3L Vortec V8, 5.3L Flex-Fuel Vortec V8, 5.3L Vortec V8 Hybrid, 6.0L Vortec V8, 6.2L VVT Vortec V8, 4.3L EcoTec3 V6, 5.3L EcoTec3 V8, 6.2L EcoTec3 V8 Sierras
*Please see Sierra parts pages for any exceptions.
