Why would brake system alert come on?
When this light comes on, it means one of two things. Either the hydraulic fluid (brake fluid) in the master cylinder is low, or the parking brake is engaged. If the system springs a leak, the fluid level will drop. A leak can cause your brakes to fail.
How many miles does a brake pad last?
Manufacturers offer a wide range for the effective “life” of their brake pads, typically between 25,000 and 65,000 miles. But the way you drive can have a big impact on brake pad wear.
How does the brake light work on a GMC C6500?
The low air pressure switch turns on the PRIMARY BRAKE warning lamp when the engine is started, and the lamp remains on until the system reaches normal pressure. If the system air pressure drops below 503 kPa (73 psi), when the ignition is on, the low air pressure switch turns on the warning lamp and the module sounds a constant tone alarm.
When does the GMC C6500 aux warning light and alarm sound?
If the system air pressure drops below 503 kPa (73 psi), when the ignition is on, the low air pressure switch turns on the warning lamp and the module sounds a constant tone alarm. If the coolant level becomes very low, the module also turns on the LOW COOLANT warning lamp and sounds an alarm at five beats per second.
When does the aux brake warning light and alarm sound?
This module turns on the PRIMARY BRAKE warning lamp on the instrument panel when the fluid level in the brake master cylinder is low, or when the flow of fluid from the power steering pump is low. If the module detects a malfunction in the auxiliary electric pump system, the module turns on the AUX BRAKE warning lamp and sounds a continuous alarm.
How does the flow switch work on a GMC C6500?
The switches are wired in series through the brake booster relay. The flow switch senses fluid flow through the primary hydraulic power system. If the primary system drops below a minimum level (about 0.75-1.50 gallons per minute), the switch closes and provides a ground signal to the coil in the brake booster relay.