Oil Pump
WARNING: This page does not describe the selected car, but rather 124 other vehicles, including the 1991 Chevrolet Pickup, 1991 Chevrolet Cab & Chassis, 1988 GMC Vandura Special, 1988 GMC Vandura, and 1988 GMC Value Van. However, it is still accessible from the selected car via links, so may be relevant.
If front seal requires replacement, pry seal out before removing pump assembly. Remove pump attaching bolts and install Oil Pump Remover (J-24773-1). Remove oil pump assembly, pump seal and gasket. See Fig 1.