1982 GMC Pick-up Truck Differential Spool C1500 - GM 8.5 in. - w/ 10 Bolt Cover - 28 Spline - Spartan Locker - Installs into standard open carrier case - Rear guaranteed to replace your current 1982 GMC Pick-up Truck Differential Spool C1500 - GM 8.5 in. - w/ 10 Bolt Cover - 28 Spline - Spartan Locker - Installs into standard open carrier case - Rear. 1982 GMC Pick-up Truck Differential Spool comes new OEM 1982 GMC Pick-up Truck Differential Spool aftermarket new 1982 GMC Pick-up Truck Differential Spool of remanufactured 1982 GMC Pick-up Truck Differential Spool C1500 - GM 8.5 in. - w/ 10 Bolt Cover - 28 Spline - Spartan Locker - Installs into standard open carrier case - Rear.