Pioneer Cables 759026 Automatic Transmission Oil Pump Seal - Front

Automatic Transmission Oil Pump Seal

Pioneer Cables 759026 is an automatic transmission oil pump seal built as an exact-fit replacement for a wide range of GM and related applications. It is used in front-position transmission service where a precise seal is needed to help maintain fluid control and restore proper sealing at the pump.

• Exact-fit replacement for automatic transmission oil pump service
• Width: 0.625 in., outer diameter: 2.875 in., inner diameter: 1.75 in.
• Supersedes part number 759025
• Cross-references National 4950 for the same application
• Compatible with many Chevrolet, GMC, Cadillac, Buick, Pontiac, Hummer, Isuzu, Saab, and Oldsmobile vehicles

Fitment Coverage

Fits 2007-2008 Chevrolet Avalanche, N/A; Fits 2004-2008 Chevrolet Colorado, N/A; Fits 1996-2008 Chevrolet Express 1500, N/A; Fits 1996-2008 Chevrolet Express 2500, N/A; Fits 2006-2008 Chevrolet Express 3500, N/A; Fits 1999-2008 Chevrolet Silverado 1500, N/A; Fits 2000-2008 Chevrolet Suburban 1500, N/A; Fits 1995-2008 Chevrolet Tahoe, N/A; Fits 2002-2008 Chevrolet Trailblazer, N/A; Fits 2004-2008 GMC Canyon, N/A; Fits 2002-2008 GMC Envoy, N/A; Fits 1996-2008 GMC Savana 1500, N/A; Fits 2003-2008 GMC Savana 2500, N/A; Fits 2006-2008 GMC Savana 3500, N/A; Fits 1999-2008 GMC Sierra 1500, N/A; Fits 1994-2008 GMC Yukon, N/A; Fits 2000-2008 GMC Yukon XL 1500, N/A; Fits 2006-2008 Hummer H3, N/A; Fits 2003-2008 Isuzu Ascender, N/A; Fits 2005-2008 Saab 9-7x, N/A; Fits 2004-2007 Hummer H2, N/A; Fits 2002-2006 Cadillac Escalade, N/A; Fits 1994-2005 Chevrolet Astro, N/A; Fits 1994-2005 Chevrolet Blazer, N/A; Fits 1994-2005 Chevrolet Corvette, N/A; Fits 1993-2004 Chevrolet S10, Front; Fits 1994-2004 GMC Jimmy, N/A; Fits 1993-2004 GMC Sonoma, N/A; Fits 1996-2004 Oldsmobile Bravada, N/A; Fits 1994-2002 Chevrolet Camaro, N/A; Fits 1994-2002 Pontiac Firebird, N/A; Fits 1994-1999 Chevrolet C1500, N/A; Fits 1994-1999 GMC C1500, N/A; Fits 1994-1998 Chevrolet C2500, N/A; Fits 1994-1998 GMC C2500, N/A; Fits 1994-1996 Buick Roadmaster, N/A; Fits 1994-1996 Cadillac Fleetwood, N/A; Fits 1994-1996 Chevrolet Caprice, N/A; Fits 1994-1996 Chevrolet Impala, N/A; Fits 1994-1995 Chevrolet G10, N/A; Fits 1994-1995 GMC G1500, N/A; Fits 1993 Chevrolet Astro, Front; Fits 1987-1990 Cadillac Brougham, Front; Fits 1982-1990 Chevrolet Caprice, Front; Fits 1978-1987 Buick Regal, Front; Fits 1978-1987 Chevrolet El Camino, Front; Fits 1980-1985 Buick LeSabre, Front; Fits 1977-1985 Chevrolet Impala, Front; Fits 1978-1984 Oldsmobile 98, Front; Fits 1978-1981 Buick Century, Front; Fits 1977 Chevrolet Nova, Front; Fits 1976-1982 Chevrolet LUV, Front.

Common Repair Uses

• Restores sealing at the transmission oil pump
• Addresses fluid seepage at the front of the transmission
• Supports transmission rebuild and overhaul work
• Replaces a worn or hardened pump seal during service
• Helps correct leak-related fluid loss in GM automatic transmissions

Installation Notes

Verify seal dimensions and transmission family before installation. This part is listed for N/A and Front positions depending on application, so match the vehicle row and any transmission-specific notes before ordering. Clean the pump bore and sealing surface thoroughly, and inspect the pump and related components for wear that could affect seal retention.

Quality Assurance

Pioneer Transmission Components are positioned as exact-fit replacement parts for transmission service. Part number 759026 replaces 759025 and is listed with direct cross-reference coverage for National 4950 and related interchange numbers.