Pivot Shaft Bushing Replacement ("C" Series)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1990 GMC S15 Pickup, 1990 GMC S15 Jimmy, 1990 GMC Pickup, 1990 GMC Cab & Chassis, and 1990 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Upper control arm bushings are not replaceable on "C" Series models 1500 and 2500. Control arm and bushings are serviced as a unit. Information not available from manufacturer on bushing replacement procedures for other "C" Series.