Chevrolet:
2002-2006 Avalanche 2500 Front Axle; 3.73 Ratio (Opt GT4)
2001-2003 Silverado 1500 Pickup Front Axle; Crew Cab, 3.73 Ratio (Opt GT4)
2004-2006 Silverado 1500 Pickup Front Axle; Crew Cab, 8 Lug Wheel, 3.73 Ratio (Opt GT4)
2007-2007 Silverado 1500 Pickup Front Axle; Classic Style (Creased Door Skin), 8 Lug Wheel, 3.73 Ratio (Opt GT4)
1999-2010 Silverado 2500 Pickup Front Axle; 3.73 Ratio (Opt GT4)
2001-2010 Silverado 3500 Pickup Front Axle; 3.73 Ratio (Opt GT4)
2000-2007 Suburban 2500 Front Axle; 3.73 Ratio (Opt GT4)
2008-2013 Suburban 2500 Front Axle
GMC:
2001-2003 Sierra 1500 Pickup Front Axle; Crew Cab, 3.73 Ratio (Opt GT4)
2004-2005 Sierra 1500 Pickup Front Axle; Crew Cab, 8 Lug Wheel, 3.73 Ratio (Opt GT4)
2006-2006 Sierra 1500 Pickup Front Axle; 8 Lug Wheel, 3.73 Ratio (Opt GT4)
2007-2007 Sierra 1500 Pickup Front Axle; Classic Style (Creased Door Skin), 8 Lug Wheel, 3.73 Ratio (Opt GT4)
1999-2010 Sierra 2500 Pickup Front Axle; 3.73 Ratio (Opt GT4)
2001-2010 Sierra 3500 Pickup Front Axle; 3.73 Ratio (Opt GT4)
2000-2007 Yukon XL 2500 Front Axle; 3.73 Ratio (Opt GT4)
2008-2013 Yukon XL 2500 Front Axle