To remove and install the brake components on the 199D-91 Eldorado and Seville, begin by using a syringe to extract one-third of the brake fluid from the master cylinder reservoir, then raise and securely support the vehicle. Remove the wheel and tire assembly, reinstall two lug nuts to hold the disc brake rotor, and detach the disc brake caliper from the rotor and mounting bracket without disconnecting the brake hose, suspending the caliper from the strut. Unsnap the outboard disc brake pad springs from the caliper holes, press in on the edge of the inboard pad to release it, and remove the bushings from the caliper mounting bracket. Extract the two-way check valve from the caliper piston using a small prybar. For installation, use adjustable pliers to bottom the caliper piston in the bore, ensuring the boot lays flat, then lubricate and install new bushings in the mounting bolt holes. Lubricate and install a new two-way check valve into the caliper piston, followed by the inboard disc brake pad, ensuring proper engagement with the retainer and alignment with the piston. Install the outboard pad with the wear sensor at the trailing edge, snap the pad springs into place, and reinstall the caliper. After lowering the vehicle and reattaching the wheel and tire assembly, apply the brake pedal several times to seat the pads and check the brake fluid level, adding as necessary. For the 1992-98 Eldorado and Seville and 1994-98 Deville, repeat the fluid removal process, raise the vehicle, and remove the wheel and tire assembly, reinstalling two lug nuts. Detach the cable support bracket from the caliper without disconnecting the parking brake cable or brake hose, then remove the sleeve bolt and pivot the caliper upward to access the disc brake pads and clips. Use a suitable tool to turn the piston and press out trapped air, ensuring the boot lays flat. Install new pad clips and position the disc brake pads with the wear sensor downward, then pivot the caliper down, compressing the sleeve boot to avoid damage. Tighten the sleeve bolt and cable support bracket, reinstall the wheel and tire assembly, lower the vehicle, apply the brake pedal to seat the pads, and check the brake fluid level, adding as necessary.
