Please make sure you need the 263 XHD not the 263 HD!!!
OE Part Number:
24228417, 12575648, 12576352, 12579909, 12581004, 12584758
12585237, 12588516, 15005450, 15057935, 15772805, 24228411
24238188, 24238841, 412456, 12573382, 412-540, NP263XHD
263XHD, NP263, NP 263 XHD
Compatible Models
Replacement for CHEVY SILVERADO 2500 2001-2006
Replacement for CHEVY SILVERADO 2500 CLASSIC 2007
Replacement for CHEVY SILVERADO 3500 2001-2006
Replacement for CHEVY SILVERADO 3500 CLASSIC 2007
Replacement for GMC SIERRA 2500 HD 2001-2006
Replacement for GMC SIERRA 2500 CLASSIC 2007
Replacement for GMC SIERRA 3500 HD 2001-2006
Replacement for GMC SIERRA 3500 CLASSIC 2007
Specifications:
263XHD Transfer Case
29 Input Splines
31 Output Splines (Rear)
32 Output Splines (Front)
6.6 Diesel Duramax
8.1 Gas Engine
Bolts Up to Allison Transmissions and ZF6 Manuals