GMC Sierra 2500 HD Catalytic Converters
This page brings together catalytic converters for the GMC Sierra 2500 HD spanning model years 2001–2024, including universal, direct-fit, OE replacement, and manifold styles in stainless steel and other constructions. Choose your model year above and this page keeps only the catalytic converters that fit your GMC Sierra 2500 HD. Each listing is matched to our vehicle fitment data before it appears here.
Magnaflow 457105 Universal Catalytic Converter 2.25 Inch Inlet/Outlet
Magnaflow 459056 Universal Catalytic Converter 2.50 Inch Inlet/Outlet
Magnaflow 51559 Universal Catalytic Converter 3 Inch Inlet/Outlet
Magnaflow 51309 Universal Catalytic Converter 3.00 Inch Inlet/Outlet
Magnaflow 459006 Universal Catalytic Converter 2.50 Inch Inlet/Outlet
Magnaflow 337304 Universal Catalytic Converter 2.00 Inch Inlet/Outlet
Magnaflow 458006 Universal Catalytic Converter 2.50 Inch Inlet/Outlet
Magnaflow 334006 Universal Catalytic Converter 2.50 Inch Inlet/Outlet
Magnaflow 447209 Universal Catalytic Converter 3 Inch Inlet/Outlet
Magnaflow 459009 Universal Catalytic Converter 3.00 Inch Inlet/Outlet
Magnaflow 60020 OEM Grade Universal Diesel Catalytic Converter 3.5in Weld-On
Magnaflow 60010 OEM Grade Universal Diesel Oxidation Catalyst 3.50in Inlet/Outlet
Magnaflow 60021 Universal Diesel Oxidation Catalyst 4.00in Inlet/Outlet
- 1
- 2
What's here for your GMC Sierra 2500 HD
- Catalytic converters in universal-fit configurations
- Direct-fit catalytic converters designed for straightforward installation
- OE replacement catalytic converters
- Manifold-style catalytic converters
- Stainless steel construction options
The widest range of GMC Sierra 2500 HD catalytic converters here comes from Magnaflow, AP Exhaust, Bosal, and Catco. Other categories GMC Sierra 2500 HD owners shop for: GMC Sierra 2500 HD Shocks and Struts, GMC Sierra 2500 HD Exterior Lights and GMC Sierra 2500 HD Springs and Suspension Parts, or browse all GMC Sierra 2500 HD parts and accessories.