To maintain good brake function, look for wear or leaks in the rubber hoses connecting brake assemblies to steel brake lines by raising the car using jackstands about every 6 months. If any hose shows these conditions, replace it. First, remove the wheel from the truck using an open-end wrench. Then raise the vehicle with a jack, keeping it stable while you do your work. Use the flare-nut wrench to loosen the brake line fitting from the hose at the bracket, then hold the hose end with a wrench. Lift the hose end through a hollow U-clip after removing it from a female fitting in the bracket. When you reach the caliper end, erase the bolt that draws the hose inlet to it, disconnecting the hose from the caliper, and reinstall the two copper sealing washers. Insert the inlet fitting bolt onto the caliper and add new sealing washers, tightening it to the correct torque. Place the hose in the frame bracket without kinks, join the brake fitting onto it, put the U-clip back on, and secure the fitting tightly. Following those steps, press the brake pedal until only air comes out of the caliper, put the wheel back on, lower the vehicle, and finally tighten all the lug nuts according to the specified torque. Before starting, raise your vehicle and put it on jack stands, blocking the front wheels. Loosen and detach the brake line fitting from the hose at the chassis bracket with a flare-nut wrench. Remove the U-clip, and feed the hose through. Loosen and remove two brake line fittings from the axle housing and bolt that holds the fitting block to the axle. Disconnect and take out the brake lines. To install the brake system, follow these steps in reverse: bleed both rear brakes as you return everything back into place. Always get the right brake line replacement parts, and never use copper instead of steel. To fix your brake lines, get them from a shop or store that sells auto parts, and use ready-made lines with threaded ends that you shape with your hands. Put the new line in place and make sure it won't move when the suspension moves or when engine heat builds up nearby. Before you can drive, refill the master cylinder, depressurize the brake system, and make sure the brakes work correctly.