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 need to be working
If the warning light comes on, there is a brake problem. Have the brake system inspected right away.
Warning
The brake system might not be working properly if the brake system warning light is on. Driving with the brake system warning light on can lead to a crash. If the light is still on after the vehicle has been pulled off the road and carefully stopped, have the vehicle towed for service.

This light should come on briefly when the ignition is turned to ON. If it does not come on then, have it fixed so it will be ready to warn if there is a problem.
When the ignition is on, the brake system warning light will also come on when the parking brake is set. The light will stay on if the parking brake does not fully release. If it stays on after the parking brake is fully released, it means there is a brake problem.
If the light comes on while driving, carefully pull off the road and stop. The pedal may be harder to push or may go closer to the floor. It may take longer to stop. If the light is still on, have the vehicle towed for service. See Towing the Vehicle.
Service Vehicle Soon Light
Antilock Brake System (ABS) Warning LightFog Lamps
For vehicles with front fog lamps, the button is on the outboard side of the
instrument panel.
The ignition must be on to turn on the fog lamps.
(Fog Lamps): Press to turn the
fog lamps on or off. An indicator light on the instrument cluster comes on when
the fog lamps are on.
The fog la ...
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 specifications and
check manufacturer information respectively. We recommend the use of GM genuine
...
Oil Pan Cleaning and Inspection
Warning: Wear safety glasses when using compressed air in order
to prevent eye injury.
Caution: To ensure proper engine lubrication, clean clogged or
contaminated oil galleries in an approved solvent and with compressed air.
Failure to clean oil galleries may cause ...