FITS FOR GMC and CHEVY 01-06 6.0L & 6.5L EQUIPPED 1500HD, 2500, 2500HD, & 3500 SILVERADO & SIERRA SERIES TRUCKS WITH NP261, NP261HD, NP263, OR NP263HD TRANSFER CASE FITS FOR GMC and CHEVY 07 6.0L & 6.5L EQUIPPED 1500HD, 2500, 2500HD, & 3500 SILVERADO & SIERRA CLASSIC SERIES TRUCKS WITH NP261, NP261HD, NP263, OR NP263HD TRANSFER CASE FITS FOR GMC and CHEVY 99-00 4.3L, 4.8L, 5.3L, & 6.0L EQUIPPED 1500 SILVERADO & SIERRA, & 2500 SILVERADO & SIERRA TRUCKS WITH NP261, NP261HD, NP263, OR NP263HD TRANSFER CASE KIT INCLUDES: All GASKETS, SEALS: INPUT, FRONT OUTPUT, & REAR OUTPUT, O-RINGS: DETENT, INDICATOR SWITCH, PUMP PICK-UP TUBE, RUBBER TAIL HOUSING PLUG FITS FOR GM TRUCKS WITH EITHER RPO CODE NP1 OR NP2, AND WITH EITHER RPO CODE MT1, MN8, M30, MW3, MG5. NOT FOR DURAMAX 261XHD OR 263XHD EQUIPPED TRANSFER CASES