Image Coming Soon

Suspension

Ring Gear - Pinion

For GMC, Chevrolet and General Motors vehicles

OEM Part Numbers

12479329

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network and the Amazon Associates Program. The Hollander Part Description Text appearing is Copyright © 2026 by Hollander, LLC, All rights reserved.

  • Fitments

model VIN C/K (5th digit) front axle 8 lug wheel 3.73 ratio (opt GT4)

1989 GMC GMC 2500 PICKUP

Front Axle 8 lug wheel 3.73 ratio (opt GT4)

1990 GMC GMC 2500 PICKUP
1991 GMC GMC 2500 PICKUP
1992 GMC GMC 2500 PICKUP
1993 GMC GMC 2500 PICKUP
1994 GMC GMC 2500 PICKUP
1995 GMC GMC 2500 PICKUP
1995 Chevrolet SUBURBAN 1500
1996 Chevrolet SUBURBAN 1500
1997 Chevrolet SUBURBAN 1500
1998 Chevrolet SUBURBAN 1500
1999 Chevrolet SUBURBAN 1500

Front Axle (8 lug) 3.73 ratio (opt GT4)

1996 GMC GMC 2500 PICKUP
1997 GMC GMC 2500 PICKUP
1998 GMC GMC 2500 PICKUP
1992 Chevrolet SUBURBAN 2500
1993 Chevrolet SUBURBAN 2500
1994 Chevrolet SUBURBAN 2500
1995 Chevrolet SUBURBAN 2500
1996 Chevrolet SUBURBAN 2500
1997 Chevrolet SUBURBAN 2500
1998 Chevrolet SUBURBAN 2500
1999 Chevrolet SUBURBAN 2500

7.4L front axle (8 lug) 3.73 ratio (opt GT4)

1999 GMC GMC 2500 PICKUP
2000 GMC GMC 2500 PICKUP

Front 3.73 ratio

2001 GMC SIERRA 3500 PICKUP

front 3.73 ratio

2002 GMC SIERRA 3500 PICKUP
2003 GMC SIERRA 3500 PICKUP
2004 GMC SIERRA 3500 PICKUP
2005 GMC SIERRA 3500 PICKUP
2006 GMC SIERRA 3500 PICKUP
2008 GMC SIERRA 3500 PICKUP
2009 GMC SIERRA 3500 PICKUP
2010 GMC SIERRA 3500 PICKUP
2002 Chevrolet AVALANCHE 2500
2003 Chevrolet AVALANCHE 2500
2004 Chevrolet AVALANCHE 2500
2005 Chevrolet AVALANCHE 2500
2006 Chevrolet AVALANCHE 2500
2001 Chevrolet SILVERADO 2500 PICKUP
2002 Chevrolet SILVERADO 2500 PICKUP
2003 Chevrolet SILVERADO 2500 PICKUP
2004 Chevrolet SILVERADO 2500 PICKUP
2005 Chevrolet SILVERADO 2500 PICKUP
2006 Chevrolet SILVERADO 2500 PICKUP
2008 Chevrolet SILVERADO 2500 PICKUP
2009 Chevrolet SILVERADO 2500 PICKUP
2010 Chevrolet SILVERADO 2500 PICKUP
2001 Chevrolet SILVERADO 3500 PICKUP
2002 Chevrolet SILVERADO 3500 PICKUP
2003 Chevrolet SILVERADO 3500 PICKUP
2004 Chevrolet SILVERADO 3500 PICKUP
2005 Chevrolet SILVERADO 3500 PICKUP
2006 Chevrolet SILVERADO 3500 PICKUP
2008 Chevrolet SILVERADO 3500 PICKUP
2009 Chevrolet SILVERADO 3500 PICKUP
2010 Chevrolet SILVERADO 3500 PICKUP

new style (smooth door skin) front 3.73 ratio

2007 GMC SIERRA 3500 PICKUP
2007 Chevrolet SILVERADO 2500 PICKUP
2007 Chevrolet SILVERADO 3500 PICKUP

Front Axle 3.73 ratio (opt GT4)

2000 GMC YUKON XL 2500
2001 GMC YUKON XL 2500
2002 GMC YUKON XL 2500
2003 GMC YUKON XL 2500
2004 GMC YUKON XL 2500
2005 GMC YUKON XL 2500
2006 GMC YUKON XL 2500
2007 GMC YUKON XL 2500
2000 Chevrolet SUBURBAN 2500
2001 Chevrolet SUBURBAN 2500
2002 Chevrolet SUBURBAN 2500
2003 Chevrolet SUBURBAN 2500
2004 Chevrolet SUBURBAN 2500
2005 Chevrolet SUBURBAN 2500
2006 Chevrolet SUBURBAN 2500
2007 Chevrolet SUBURBAN 2500
1988 Chevrolet CHEVROLET 3500 PICKUP

front axle

2008 GMC YUKON XL 2500
2009 GMC YUKON XL 2500
2010 GMC YUKON XL 2500
2011 GMC YUKON XL 2500
2012 GMC YUKON XL 2500
2013 GMC YUKON XL 2500
2008 Chevrolet SUBURBAN 2500
2009 Chevrolet SUBURBAN 2500
2010 Chevrolet SUBURBAN 2500
2011 Chevrolet SUBURBAN 2500
2012 Chevrolet SUBURBAN 2500
2013 Chevrolet SUBURBAN 2500

Front Axle Crew Cab 3.73 ratio

2001 GMC SIERRA 1500 PICKUP
2002 GMC SIERRA 1500 PICKUP
2003 GMC SIERRA 1500 PICKUP

Front Axle 8 lug wheel 3.73 ratio

2004 GMC SIERRA 1500 PICKUP
2005 GMC SIERRA 1500 PICKUP
2006 GMC SIERRA 1500 PICKUP

classic style (creased door skin) front axle 8 lug wheel 3.73 ratio

2007 GMC SIERRA 1500 PICKUP

Front 3.73 ratio (opt GT4)

1999 Chevrolet SILVERADO 2500 PICKUP

front 3.73 ratio (opt GT4)

2000 Chevrolet SILVERADO 2500 PICKUP

Front Axle turbo diesel 3.73 ratio (opt GT4)

1994 General Motors BLAZER/JIMMY (full size)

model VIN C/K (5th digit) front axle 3.73 ratio (opt GT4)

1989 Chevrolet CHEVROLET 3500 PICKUP