Disc Rotor
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1990 Pontiac Bonneville, 1990 Oldsmobile Ninety-Eight, 1990 Oldsmobile Eighty-Eight, 1990 Cadillac Fleetwood, and 1990 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Raise and support vehicle. Remove front wheel and reinstall one wheel nut to retain rotor during caliper removal. Remove cotter pin and nut securing brake hose to upper control arm. Remove caliper and wire up out of way. Mark rotor and hub for reassembly and remove rotor. To install, reverse removal procedure.