AP02 NP246 Transfer Case 4L80 Fits Silverado Suburban Sierra 2500 Yukon XL 2003-2007 Electric Shift, 32 Spline Specifications: Input Shaft (Internal Spline): 32 Front Output: 32 (Internal Spline, one tooth missing) Rear Output (External Spline): 32 OE Number: NP246 / 412-487 / RTC246G4 / 4L80 24228439, 12575942, 24233726, 24237190, 24237288 24238848, 24239525, 24240016, 12577835, 12580185 12580860, 12584881, 12585240, 12586467, 24238533 Fits Following Models: This is for the Electric Shift model. Fits 2003-2007 GM Trucks with RPO code NP8. (32 spline input shaft 4L80 Transmission) - Avalanche 2500 2003-2006 - Silverado 2500 2003-2004 - Suburban 2500 2003-2007 Sierra 2500 2003-2004 Yukon XL 2500 2003-2007 Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.