Buy 2003 Gmc Sierra 2500 HD SLT Extended Cab Pickup Fleetside 6.0L Vortec V8 CNG M/T RWD AXLE HOUSING. DIFFERENTIAL, Driveline - OEM Gmc Part # 12471442

1 Ton; 10. 50. 1 Ton; 11. 50; 1 Ton. 1 Ton; 11. 50; 3/4 Ton. 1 Ton; 9. 50. 1 Ton; Crew Cab; 1 Piece; 153" Wheelbase. 1 Ton; Crew Cab; 2 Piece; 153" Wheelbase; Auto TRANS. 1 Ton; Crew Cab; 2 Piece; 153" Wheelbase; Manual Trans; W/6 Speed. 1 Ton; Crew Cab; 2 Piece; 153" Wheelbase; Manual Trans; W/O 6 Speed. 1 Ton; Crew Cab; 2 Piece; 167" Wheelbase. 1 Ton; Extended Cab; 1 Piece; 143" Wheelbase; Front; W/6 Speed. 1 Ton; Extended Cab; 1 Piece; 143" Wheelbase; Front; W/O 6 Speed. 1 Ton; Extended Cab; 1 Piece; 143" Wheelbase; Rear; W/6 Speed. 1 Ton; Extended Cab; 1 Piece; 143" Wheelbase; Rear; W/O 6 Speed. 1 Ton; Extended Cab; 1 Piece; 157" Wheelbase. 1 Ton; Extended Cab; 2 Piece; Manual Trans; 5 Speed. 1 Ton; Extended Cab; 2 Piece; Manual Trans; 6 Speed. 1 Ton; Standard Cab; 1 Piece; W/6 Speed. 1 Ton; Standard Cab; 1 Piece; W/O 6 Speed. 11. 50; W/LIMITED Slip. 11. 50; W/O Limited Slip. 8. 625; 3. 08 Ratio. 8. 625; 3. 23 Ratio. 8. 625; 3. 42 Ratio. 8. 625; 3. 73 Ratio. 8. 625; 4. 10 Ratio. 8. 625; Left.