Piston Pins
WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Using a small screwdriver and Piston Pin Retaining Ring Installer (J39507), install retaining rings. Opening in an installed retaining ring should face downward (toward crankshaft).