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GMC Sierra Mufflers

2.7L I4, 3.0L I6 Duramax, 4.3L V6, 4.8L V8, 5.3L V8, 6.0L V8, 6.2L V8

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GMC Sierra Mufflers

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.


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Fitment Includes

  • 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.