Chevrolet Sonic Repair Manual: Brake Pad Inspection
- Inspect the disc brake pads at regular intervals, or whenever the tire and wheel assemblies are removed from the vehicle.
- If replacement is necessary, always replace disc brake pads in axle sets.
- Inspect both edges of the disc brake pad friction surfaces (3). The highest rate of wear normally occurs at the trailing edge of the disc brake pads.
- Inspect the thickness of the disc brake pads (3) in order to ensure that they have not worn prematurely. The disc brake pad wear should be approximately even per axle set.
- Front brake pads have integral, audible wear sensors (1). When the disc brake pad wear reaches the minimum allowable thickness, the wear sensor contacts the disc brake rotor (2). The wear indicator will then produce an audible, high-pitched warning noise during wheel rotation.
- Replace the disc brake pads when the friction surface (3) is worn to within 2.00 mm (0.079 in) of the mounting plates.
- Verify that any disc brake pad shims that may be required are in place and not damaged or excessively corroded. Replace any missing or damaged shims in order to preserve proper disc brake performance.
- Replace the disc brake pads if any have separated from the mounting plates.
- Inspect the disc brake pads friction surfaces for cracks, fractures, or damage which may cause noise or otherwise impair disc brake performance.
Warning:
Refer to Brake Dust Warning.
Brake Pads
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Brake Pad and Rotor Burnishing
Warning: Road test a vehicle under safe conditions and while obeying
all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle
control. Failure to adhere to these precautio ...
Other materials:
Engine Heater
The engine heater can provide easier starting and better fuel economy during
engine warm-up in cold weather conditions at or below −18°C (0°F). Vehicles with
an engine heater should be plugged in at least four hours before starting.
1. Turn off the engine.
2. Open the hood and unwrap ...
Torque Lock (Automatic Transmission)
If you are parking on a hill and you do not shift the transmission into P (Park)
properly, the weight of the vehicle may put too much force on the parking pawl in
the transmission. You may find it difficult to pull the shift lever out of P (Park).
This is called “torque lock.” To prevent t ...
Airbag Roof Side Rail Module Replacement - Rear
Airbag Roof Side Rail Module Replacement - Rear
Callout
Component Name
Warning: In order to prevent SIR deployment, personal injury,
or unnecessary SIR system repairs, do not strike the door or the door
pillar in the ...
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