The Auto Trans Dip Stick Tube acts as a housing for the transmission dipstick. Frequently replaced due to rust, the Dorman replacement is constructed of high quality materials for durability and a longer service life. Vehicle model years this part fits: Cadillac Escalade ESV: 2003 Cadillac Escalade EXT: 2002, 2003 Cadillac Escalade: 2002, 2003 Chevrolet Avalanche 2500: 2002, 2003, 2004, 2005, 2006 Chevrolet Silverado 1500 HD Classic: 2007 Chevrolet Silverado 1500 HD: 2001, 2002, 2003, 2005, 2006 Chevrolet Silverado 1500: 2002, 2003, 2004, 2005, 2006 Chevrolet Silverado 2500 HD Classic: 2007 Chevrolet Silverado 2500 HD: 2001, 2002, 2003, 2004, 2005, 2006 Chevrolet Silverado 2500: 2001, 2002, 2003, 2004 Chevrolet Silverado 3500 Classic: 2007 Chevrolet Silverado 3500: 2001, 2002, 2003, 2004, 2005, 2006 Chevrolet Suburban 1500: 2001, 2002, 2003 Chevrolet Suburban 2500: 2001, 2002, 2003, 2004, 2005, 2006, 2007 GMC Sierra 1500 HD Classic: 2007 GMC Sierra 1500 HD: 2001, 2002, 2003, 2005, 2006 GMC Sierra 1500: 2001, 2002, 2003, 2004, 2006 GMC Sierra 2500 HD Classic: 2007 GMC Sierra 2500 HD: 2001, 2002, 2003, 2004, 2005, 2006 GMC Sierra 2500: 2001, 2002, 2003, 2004 GMC Sierra 3500 Classic: 2007 GMC Sierra 3500: 2001, 2002, 2003, 2004, 2005, 2006 GMC Yukon XL 1500: 2001, 2002, 2003 GMC Yukon XL 2500: 2001, 2002, 2003, 2004, 2005, 2006, 2007 GMC Yukon: 2001