Section 12 (Limited-Slip Differentials): Lubrication
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1997 Pontiac Firebird, 1997 Chevrolet Camaro, 1996 Pontiac Firebird, 1996 Chevrolet Caprice, and 1996 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
Fill differential with 3.5 pts. (1.65L) of synthetic 75W-90 Gear Lubricant (12378261). Add 4 ounces (.12L) of Limited Slip Additive (1052358).