Product Description
National extension housing seal designed for automatic transmissions on GMC Sierra 2500 HD model years 2001 through 2007. New direct replacement part supplied as one piece. Matches interchange references including Timken, SKF, C737, VEMO and King 52-55.
Product Specifications
BrandNational
TypeAutomatic Transmission Extension Housing Seal
Manufacturer Part NumberSX-ATST 2007 2006 2005 2004 2003 2002
Manufacturer Warranty1 Year
Interchange Part NumberTimken SKF C737 VEMO King 52-55
Placement on VehicleTransmission > Gaskets Sealing Systems
Compatible MakeGMC
Compatible ModelSierra 2500 HD
Compatible Year2007 2006 2005 2004 2003 2002 2001
Core ChargeFree - No Core Charge
Fitment TypeDirect Replacement
Bundle Description1 pc National Extension Housing Seal
UPCDoes not apply
Manufacturer Warranty1 Year
Core ChargeFree - No Core Charge
Fitment TypeDirect Replacement
Bundle Description1 pc National Extension Housing Seal
Placement on VehicleTransmission > Gaskets Sealing Systems
UPCDoes not apply
Vehicle Fitment
Always compare the part number and listed specifications with your original part before ordering.