Front Brake Hose Replacement for GMC Truck Sonoma Pickup - 2WD 2003

Caution: Refer to Brake Dust Caution in the Preface section.

Caution: Refer to Brake Fluid Irritant Caution in the Preface section.

Notice: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in the Preface section.

Important: The following service procedure covers vehicles equipped with both the single and dual piston calipers.

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the front tires and wheels assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
3. Clean all dirt and foreign material from the brake hoses and the brake pipes.
4. Using a backup wrench on the brake pipe fitting, disconnect the brake pipe from the brake hose hose.

Important: Install a plug or cap in the brake pipe to the exposed brake pipe fitting end in order to prevent fluid loss and contamination.

5. Disconnect the brake pipe fitting from the flex brake hose at the frame.
6. Remove the front brake hose retainer at the frame bracket.



7. Remove the hose front flex brake hose bolt and gaskets from the brake caliper.
8. Remove the brake hose from the brake caliper.
9. Remove the copper gaskets from the brake hose bolt. These gaskets maybe stick to the brake caliper or the brake hose bolt.

Important: DO NOT reuse the old copper gaskets. Always use NEW metal copper gaskets.

1. Install the copper gaskets on the brake hose.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the brake caliper bolt to the brake caliper.

Tighten
Tighten the brake hose bolt to 44 N·m (32 lb ft).




3. Remove the plug or cap from the exposed brake pipe fitting.
4. Install the brake hose to the brake pipe.

Important: Ensure that the brake hose is not twisted and does not come in contact with any of the suspension components.

5. Using a backup wrench on the brake pipe fitting, tighten the brake hose fitting.

Tighten
Tighten the brake hose fitting to 17 N·m (13 lb ft).

6. Install the brake pipe retaining clips.
7. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding .
8. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
9. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.