National 710491 Drive Axle Shaft Seal - Front Inner

Brand National 710491
Position Front Inner
Helix Type Bi-Directional Lip Design
Housing Bore (Inch) 2.717
Housing Bore (MM) 69.000
Inside Diameter 1.575
Inside Diameter 40.000
Material Polyacrylate
Outside Diameter 2.724
Outside Diameter 69.200
Outside Diameter (Inch) 2.724
Outside Diameter (mm) 69.200
Part Description Oil Seal
Series 710400
Shaft (Inch) 1.560
Shaft (MM) 39.600
Thickness 0.531
Thickness 13.500
Type #
Unit of Dimension Inch
Width (Inch) 0.610
Width (mm) 15.500
Fits Chevrolet, GMC, Oldsmobile, and Isuzu · 123 vehicles

Polyacrylate seal. Helps resist wear while maintaining a reliable barrier against leaks.

Bi-directional lip design. Supports consistent sealing performance as operating conditions change.

Oil seal. Built for driveline and axle sealing applications.

Cross-references Carlson 15552, National 710491 and 8-26053-322-0 for the same application. See all 8.

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Drive Axle Shaft Seal for Front Inner Applications

The National 710491 drive axle shaft seal is built for front inner axle locations where a precise sealing surface matters. It is a polyacrylate oil seal with a bi-directional lip design, sized for a 1.575 in. shaft and a 2.724 in. outside diameter.

Use this seal when servicing driveline and axle sealing points on vehicles such as Chevrolet Astro, Chevrolet Blazer, GMC Jimmy, and GMC Safari applications that call for the specified front inner fitment. The National 710491 is engineered for the listed housing bore and shaft dimensions to support a proper seal at the axle interface.

Key Features

  • Polyacrylate sealing material for driveline and axle service
  • Bi-directional lip design for front inner axle sealing
  • Inside diameter: 1.575 in. (40.000 mm)
  • Outside diameter: 2.724 in. (69.200 mm)
  • Thickness: 0.531 in. (13.500 mm)
  • Width: 0.610 in. (15.500 mm)
  • Housing bore: 2.717 in. (69.000 mm)
  • Shaft size: 1.560 in. (39.600 mm)
  • Oil seal part description for axle sealing service

Detailed Description

National 710491 is a drive axle shaft seal designed for front inner positions on a wide range of GM light truck and SUV applications. It is listed for Chevrolet Express 1500, Chevrolet Express 2500, GMC Savana 1500, GMC Savana 2500, Chevrolet Trailblazer, GMC Envoy, GMC Envoy XL, GMC Envoy XUV, Chevrolet Astro, Chevrolet Blazer, GMC Jimmy, GMC Safari, Chevrolet S10, GMC Sonoma, Oldsmobile Bravada, and Isuzu Hombre models with the specified axle configuration. This part cross-references Carlson 15552 for the same application.

National has supplied sealing solutions for more than 75 years, and this seal reflects that focus on dimensional accuracy and axle sealing performance. Part number 710491 is part of the 710400 series and is specified for vehicles using a 7.25-inch ring gear and AAM axle with independent front suspension where noted in the fitment data.

What It Helps Address

  • Gear oil seepage at the front inner axle seal
  • Contamination entering the axle housing through a worn seal
  • Leak-related fluid loss around the axle shaft interface
  • Seal wear from age, mileage, or heat exposure
  • Service replacement for damaged or hardened axle seals

Installation Notes and Tips

Confirm the axle configuration, housing bore, shaft diameter, and front inner position before installation. Match the seal dimensions to the original part and inspect the sealing surface for scoring, corrosion, or debris that could affect sealing performance. Clean the bore and shaft area thoroughly before pressing the seal into place.

For fitment, this part is listed for 2003-2014 Chevrolet Express 1500, front inner; 2003-2014 GMC Savana 1500, front inner; 2002-2009 Chevrolet Trailblazer, front inner; 2002-2009 GMC Envoy, front inner; 2002-2006 GMC Envoy XL, front inner; 1997-2005 Chevrolet Astro, front inner; 1997-2005 Chevrolet Blazer, front inner; 2003-2005 Chevrolet Express 2500, front inner; 2004-2005 GMC Envoy XUV, front inner; 1997-2005 GMC Jimmy, front inner; 1997-2005 GMC Safari, front inner; 2003-2005 GMC Savana 2500, front inner; 1997-2004 Chevrolet S10, front inner; 1997-2004 GMC Sonoma, front inner; 1997-2004 Oldsmobile Bravada, front inner; and 1998-2000 Isuzu Hombre, front inner.

Quality Assurance

National designs sealing components for modern vehicle service and backs this axle shaft seal with the brand’s long-standing sealing expertise. Part number 710491 is manufactured to the listed dimensions and application requirements for the specified front inner driveline use.

This part fits 123 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelDrive TypePositionNotes
2014ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2014GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2013ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2013GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2012ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2012GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2011ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2011GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2010ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2010GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2009ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2009ChevroletTrailblazer4WDFront Inner—
2009GMCEnvoy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2009GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2008ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2008ChevroletTrailblazer4WDFront Inner—
2008GMCEnvoy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2008GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2007ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2007ChevroletTrailblazer4WDFront Inner—
2007GMCEnvoy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2007GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2006ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2006ChevroletTrailblazer4WDFront Inner—
2006GMCEnvoy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2006GMCEnvoy XL4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2006GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005ChevroletAstroAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005ChevroletBlazer4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005ChevroletExpress 2500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005ChevroletTrailblazer4WDFront Inner—
2005GMCEnvoy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005GMCEnvoy XL4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005GMCEnvoy XUV4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005GMCJimmy—Front InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005GMCSafariAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2005GMCSavana 2500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004ChevroletAstroAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004ChevroletBlazer4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004ChevroletExpress 2500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004ChevroletS10—Front InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004ChevroletTrailblazer4WDFront Inner—
2004GMCEnvoy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004GMCEnvoy XL4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004GMCEnvoy XUV4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004GMCJimmy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004GMCSafariAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004GMCSavana 2500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004GMCSonoma—Front InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2004OldsmobileBravadaAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003ChevroletAstroAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003ChevroletBlazer4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003ChevroletExpress 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003ChevroletExpress 2500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003ChevroletS104WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003ChevroletTrailblazer4WDFront Inner—
2003GMCEnvoy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003GMCEnvoy XL4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003GMCJimmy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003GMCSafariAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003GMCSavana 1500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003GMCSavana 2500AWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003GMCSonoma4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2003OldsmobileBravadaAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2002ChevroletAstroAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2002ChevroletBlazer4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2002ChevroletS104WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2002ChevroletTrailblazer4WDFront Inner—
2002GMCEnvoy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2002GMCEnvoy XL4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2002GMCJimmy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2002GMCSafariAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2002GMCSonoma4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2002OldsmobileBravadaAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2001ChevroletAstroAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2001ChevroletBlazer4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2001ChevroletBlazerAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2001ChevroletS104WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2001GMCJimmy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2001GMCJimmyAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2001GMCSafariAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2001GMCSonoma4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2001OldsmobileBravadaAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2000ChevroletAstroAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2000ChevroletBlazer4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2000ChevroletBlazerAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2000ChevroletS104WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2000GMCJimmy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2000GMCJimmyAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2000GMCSafariAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2000GMCSonoma4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2000IsuzuHombre4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
2000OldsmobileBravadaAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1999ChevroletAstroAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1999ChevroletBlazer4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1999ChevroletBlazerAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1999ChevroletS104WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1999GMCJimmy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1999GMCJimmyAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1999GMCSafariAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1999GMCSonoma4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1999IsuzuHombre4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1999OldsmobileBravadaAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1998ChevroletAstroAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1998ChevroletBlazer4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1998ChevroletS104WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1998GMCJimmy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1998GMCSafariAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1998GMCSonoma4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1998IsuzuHombre4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1998OldsmobileBravadaAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1997ChevroletAstroAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1997ChevroletBlazer4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1997ChevroletBlazerAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1997ChevroletS104WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1997GMCJimmy4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1997GMCSafariAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1997GMCSonoma4WDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
1997OldsmobileBravadaAWDFront InnerFor vehicles with a 7.25-inch Ring Gear and AAM Axle, featuring Independent Front Suspension.
Directly replaces or cross-references 8 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Carlson — 15552National — 7104918-26053-322-08-12471586-08-12471680-0124715861247168026053322