GMC 15882534 Hose Assembly, Front Brake

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Every six months, it is important to inspect the rubber hoses that connect the steel brake lines with the front and rear brake assemblies for any cracks, chafing, leaks, blisters, or other damage. This inspection should be thorough, using a light and mirror if necessary. If any of these conditions are found, the hose should be replaced with a new one. To replace the front flexible brake hoses, start by loosening the wheel lug nuts and raising the vehicle on jackstands. Remove the wheel and unscrew the brake line fitting from the hose at the bracket. Use a flare-nut wrench to prevent rounding off the corners of the fitting nut. Remove the clip from the bracket and detach the hose. At the caliper end of the hose, remove the inlet fitting bolt and separate the hose from the caliper. Replace the copper sealing washers with new ones. To install the hose, connect the fitting to the caliper with the inlet fitting bolt and new sealing washers. Route the hose into its original location, ensuring it isn't twisted, and tighten the hose bracket bolt securely. Connect the brake line fitting and tighten it securely. Bleed the caliper, install the wheel, lower the vehicle, and tighten the lug nuts. For the rear flexible brake hose replacement, raise the rear of the vehicle on jackstands and block the front wheels. Unscrew the brake line fitting from the hose at the chassis end using a flare-nut wrench. Remove the clip from the bracket and detach the hose. At the brake fitting junction block on top of the left side of the rear axle housing, remove the hose from the junction block. To install the hose, connect the fitting to the junction block with a new sealing washer. Route the hose into its original location, ensuring it isn't twisted, and secure it with its clip. Connect the brake line fitting and tighten it securely. Bleed the rear brakes, install the wheel, lower the vehicle, and tighten the lug nuts. When replacing metal brake lines, use the correct parts and avoid using copper tubing. Prefabricated brake lines are available and must be bent to the proper shapes using a tubing bender. Ensure the new line is securely supported in the brackets and has enough clearance between moving or hot components. Check the master cylinder fluid level, add fluid if necessary, bleed the brake system, and test the brakes before driving the vehicle in traffic.

To install the hose, connect the fitting to the caliper with the inlet fitting bolt and new sealing washers.