Chevrolet Sonic Repair Manual: Brake System External Leak Inspection
Warning:
Refer to Brake Fluid Irritant Warning.
Caution:
Refer to Brake Fluid Effects on Paint and Electrical Components Caution.
- In order to inspect for external brake fluid leaks, first inspect the fluid
level in the master cylinder.
While a slight brake fluid level drop can be considered a normal condition due to brake lining wear, a very low level may indicate a brake fluid leak in the hydraulic system.
- If the fluid level is abnormally low, adjust the brake fluid level. Refer to Master Cylinder Reservoir Filling.
- Start the engine and allow it to idle.
- Apply constant, moderate foot pressure to the brake pedal.
If the brake pedal gradually falls away while under foot pressure, there may be a brake fluid leak.
- Turn the ignition OFF.
- Visually inspect the following brake system components for brake fluid leaks, excessive corrosion, and damage. Give particular attention to all brake pipe and flexible hose connections to ensure that there are not any slight brake fluid leaks – even though the brake pedal may feel firm and hold steady:
- Master cylinder brake pipe fittings
- All brake pipe connections
- Brake pipes
- Brake hoses and connections
- Brake calipers and/or wheel cylinders
Brake Pressure Modulator Valve Replacement
Removal Procedure
Warning: Refer to Brake Fluid Irritant Warning.
Caution: Refer to Brake Fluid Effects on Paint and Electrical
Components Caution.
Caution: Always ...
Brake System Warning Light
The vehicle brake system consists of two hydraulic circuits. If one circuit is
not working, the remaining circuit can still work to stop the vehicle. For normal
braking performance, both circuits ...
Other materials:
Traction Control System (TCS)/StabiliTrak® Light
The StabiliTrak or Traction Control System (TCS) indicator/warning light comes
on briefly when the engine is started.
If the light does not come on, have the vehicle serviced by your dealer. If the
system is working normally, the indicator light turns off.
If the light is on and not flashing ...
Brake Drum Surface and Wear Inspection
Special Tools
CH-8001 Dial Indicator Set
For equivalent regional tools, refer to Special Tools.
Warning: Refer to Brake Dust Warning.
With the brake drum removed, clean the brake shoe lining contact surface
of the brake drum with denatured alcohol or an equivalent approved brak ...
Transmission Control Replacement
Transmission Control Replacement
Callout
Component Name
Preliminary Procedures
Remove the front floor console. Refer to
Front Floor Console Replacement.
Disconnect the range selector lever cable. Refer
to Range Select ...
0.0059