Keyless Entry Control Module
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1990 Pontiac Bonneville, 1990 Oldsmobile Toronado, 1990 Oldsmobile Ninety-Eight, 1990 Oldsmobile Eighty-Eight, and 1990 Cadillac Fleetwood. However, it is still accessible from the selected car via links, so may be relevant.
Remove defrost grille, carefully prying it from upper dash area. Unclip light monitor from underside of defrost grille. Push unit through trim pad. Unscrew and remove trim pad. Disconnect 2 electrical connectors from control module. Unbolt and remove control module. See Fig 1 . To install, reverse removal procedure.