Chevrolet Sonic manuals

Chevrolet Sonic Repair Manual: Hydraulic Brake Component Operation Visual Inspection

Chevrolet Sonic Repair Manual / Chassis / Brakes / Hydraulic Brakes / Hydraulic Brake Component Operation Visual Inspection

Disc Brake

    With the tire and wheel assemblies removed and the brake rotors retained
  1. With the tire and wheel assemblies removed and the brake rotors retained by wheel lug nuts, visually inspect the brake caliper piston dust boot (2) sealing area to ensure that there are no brake fluid leaks.
  2. If any evidence of a brake fluid leak is present, the brake caliper requires overhaul or replacement.
  3. While the brake system is at rest (4), observe the position of the brake caliper piston (1) in relation to the brake caliper housing.
  4. Have an assistant apply and release the brake pedal several times while you observe the operation of the hydraulic brake caliper.
    1. Observe the brake caliper piston (1) for unrestricted and even movement during each apply of the brake system (5).
    2. Observe the brake caliper piston (1) for an unrestricted and even return motion during each release of the brake system (6).
  5. If the brake caliper piston (1) did not exhibit unrestricted and even movement during brake system apply and/or release, the piston square seal (3) may be worn or damaged and the brake caliper may require overhaul or replacement.
Drum Brakes

    With the rear tire and wheel assemblies and the brake drums removed,
  1. With the rear tire and wheel assemblies and the brake drums removed, visually inspect the wheel cylinder pistons boot sealing areas to ensure that there are no brake fluid leaks.
  2. If any evidence of a brake fluid leak is present, the brake wheel cylinder requires replacement.
  3. Using firm hand pressure, simultaneously and evenly apply force on both brake shoes in order to compress the wheel cylinder pistons into their bore.
  4. Evenly release the force from both brake shoes to allow the wheel cylinder pistons to return.
  5. If one or both of the wheel cylinder pistons did not exhibit unrestricted and even movement during apply and/or release of force, the wheel cylinder may require replacement.
Hydraulic Brakes
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Hydraulic Brake System Bleeding (Manual)
Warning: Refer to Brake Fluid Irritant Warning. Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution. Caution: Only use products that comply with GM spe ...

Other materials:

Securing a Child Restraint Designed for the LATCH System
Warning If a LATCH-type child restraint is not attached to anchors, the child restraint will not be able to protect the child correctly. In a crash, the child could be seriously injured or killed. Install a LATCH-type child restraint properly using the anchors, or use the vehicle safety belts ...

Water Pump Replacement (LUW)
Removal Procedure Drain the cooling system. Refer to Cooling System Draining and Filling. Remove the water pump pulley. Refer to Water Pump Pulley Replacement. Remove the 5 water pump bolts (2). Remove the water pump (1). Insta ...

Transmission Fluid Cooler Flushing and Flow Test
GM studies indicate that plugged or restricted transmission oil coolers and pipes cause insufficient transmission lubrication and elevated operating temperatures which can lead to premature transmission failure. Many repeat repair cases could have been prevented by following published procedur ...

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