Transfer Case Input Shaft (Internal Spline): 27 Front Output: 32 (Internal Spline, One Tooth Missing) Rear Output (External Spline): 32 1998-2002, Electric Shift 27 Splines 4L60E Transmission OEM Part Number: 24228410, 12575125, 15007093, 15017351 15017912, 15017942, 15037093, 15037351 15039438, 15052506, 15709322, 15753790 15761465, 15769438, 24228404, 12572904 52800113, 412-426 Fit For the Following Models: Escalade 1999-2000 Avalanche 1500 2002 K1500 Suburban 1998-1999 Silverado 1500 1999-2002 Suburban 1500 2000 Tahoe 1998-2002 K1500 Suburban 1998-1999 Sierra 1500 1999-2002 Yukon 1998-2002 Yukon XL 1500 2000-2002 Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.