GMC Sierra 3500 Catalytic Converters
This page brings together catalytic converters for the GMC Sierra 3500, covering model years 2001–2007. The range includes both direct-fit and universal options, as well as diesel oxidation catalysts for diesel-equipped trucks. Select your year above and we'll show only the catalytic converters that fit your GMC Sierra 3500. Fitment is checked against our vehicle data for every part listed.
Magnaflow 457105 Universal Catalytic Converter 2.25 Inch Inlet/Outlet
Magnaflow 459056 Universal Catalytic Converter 2.50 Inch Inlet/Outlet
AP Exhaust 606007 Universal Pre-OBDII Catalytic Converter Federal EPA Super Duty
Magnaflow 51309 Universal Catalytic Converter 3.00 Inch Inlet/Outlet
Magnaflow 337304 Universal Catalytic Converter 2.00 Inch Inlet/Outlet
Representative Photo, actual item may vary
Magnaflow 447209 Universal Catalytic Converter 3 Inch Inlet/Outlet
Magnaflow 60020 OEM Grade Universal Diesel Catalytic Converter 3.5in Weld-On
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What's here for your GMC Sierra 3500
- Direct-fit catalytic converters sized and positioned for bolt-on replacement
- Universal catalytic converters for custom or modified exhaust configurations
- Manifold-style catalytic converters that integrate closely with the exhaust manifold
- OE replacement catalytic converters engineered to match original specifications
- Diesel oxidation catalysts designed for diesel-powered Sierra 3500 applications
The widest selection here comes from AP Exhaust, Magnaflow, Walker Exhaust, and Bosal, each offering a broad range of converter styles and fitments for 2001–2007 Sierra 3500 trucks. Other categories GMC Sierra 3500 owners shop for: GMC Sierra 3500 Shocks and Struts, GMC Sierra 3500 Exterior Lights and GMC Sierra 3500 Seats and Seat Parts, or browse all GMC Sierra 3500 parts and accessories.