Brakes
Antilock Brake System (ABS)
The Antilock Brake System (ABS) helps prevent a braking skid and maintain steering while braking hard. ABS performs a system check when the vehicle is first driven. A momentary motor or clicking noise may be heard while this test is going on, and the brake pedal may move slightly. This is normal.
If there is a problem with ABS, this warning light stays on. See Antilock Brake System (ABS) Warning Light 0 106.
ABS does not change the time needed to get a foot on the brake pedal and does not always decrease stopping distance. If you get too close to the vehicle ahead, there will not be enough time to apply the brakes if that vehicle suddenly slows or stops. Always leave enough room ahead to stop, even with ABS.
Using ABS
Do not pump the brakes. Just hold the brake pedal down firmly. Hearing or feeling ABS operate is normal.
Braking in Emergencies
ABS allows steering and braking at the same time. In many emergencies, steering can help even more than braking.
Electric Parking Brake
The vehicle has an Electric Parking Brake (EPB). The EPB can always be activated, even if the ignition is off. To prevent draining the battery, avoid repeated cycles of the EPB system when the engine is not running. The system has aY or PARK Electric Parking Brake light, and a 8 Service Parking Brake light. See Electric Parking Brake Light 0 105 and Service Electric Parking Brake Light 0 105.
Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) - 2020 - CRC - 6/11/19
Before leaving the vehicle, check for theY or PARK light to ensure that the parking brake is applied.
EPB Apply
To apply the EPB: 1. Be sure the vehicle is at a
complete stop. 2. Lift up the EPB switch
momentarily. TheY or PARK light will flash and then stay on once the EPB is fully applied. If theY or PARK light flashes continuously, then the EPB is only partially applied or there is a problem with the EPB. A DIC message will display. Release the EPB and try to apply it again. If the light does not come on, or keeps flashing, have the vehicle serviced. Do not drive the vehicle if theY or PARK light is flashing. See your dealer. See Electric Parking Brake Light 0 105.
If the 8 light is on, press the EPB switch and hold it. Continue to hold the switch until theY or PARK light remains on. If the 8 light remains on, see your dealer. If the EPB is applied while the vehicle is moving, the vehicle will decelerate as long as the switch is pressed. If the switch is pressed until the vehicle comes to a stop, the EPB will remain applied. The vehicle may automatically apply the EPB in some situations when the vehicle is not moving. This is normal, and is done to periodically check the correct operation of the EPB system. If the EPB fails to apply, block the rear wheels to prevent vehicle movement.
EPB Release
To release the EPB: 1. Turn the ignition on or to ACC/
ACCESSORY. 2. Apply and hold the brake
pedal.
3. Press the EPB switch momentarily.
The EPB is released when theY or PARK light is off. If the 8 light is on, release the EPB by pressing and holding the EPB switch. Continue to hold the switch until theY or PARK light is off. If either light stays on after release is attempted, see your dealer.
Caution
Driving with the parking brake on can overheat the brake system and cause premature wear or damage to brake system parts. Make sure that the parking brake is fully released and the brake warning light is off before driving.
Automatic EPB Release
The EPB will automatically release if the vehicle is running, placed into gear, and an attempt is made to
Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) - 2020 - CRC - 6/11/19
Driving and Operating 163
drive away. Avoid rapid acceleration when the EPB is applied, to preserve parking brake lining life.
Brake Assist
Brake Assist detects rapid brake pedal applications due to emergency braking situations and provides additional braking to activate the Antilock Brake System (ABS) if the brake pedal is not pushed hard enough to activate ABS normally. Minor noise, brake pedal pulsation, and/or pedal movement during this time may occur. Continue to apply the brake pedal as the driving situation dictates. Brake Assist disengages when the brake pedal is released.
Hill Start Assist (HSA)
Warning
Do not rely on the HSA feature. HSA does not replace the need to pay attention and drive safely.
You may not hear or feel alerts or warnings provided by this system. Failure to use proper care when driving may result in injury, death, or vehicle damage. See Defensive Driving 0 141.
When the vehicle is stopped on a grade, Hill Start Assist (HSA) temporarily prevents the vehicle from rolling in an unintended direction during the transition from brake pedal release to accelerator pedal apply. The brakes release when the accelerator pedal is applied or automatically release after a few seconds. The brakes may also release under other conditions. Do not rely on HSA to hold the vehicle. HSA is available when the vehicle is facing uphill in a forward gear, or when facing downhill in R (Reverse). The vehicle must come to a complete stop on a grade for HSA to activate.
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