GM Service Manual Online
For 1990-2009 cars only

Warning Lamp for Chevrolet Chevy P42 Commercial Chassis 1997

There are four lamps used to show brake system operation and malfunctions.

The BRAKE warning lamp in the instrument cluster alerts the driver of a malfunction in the brake system operation.

The low air pressure warning lamps in the instrument cluster are provided for brake systems #1 and #2. The appropriate lamp lights up when the air pressure in that part of the system drops to 60 psi. A warning buzzer is also attached to system #1 and comes on when the air pressure in that system drops to 60 psi.

The PARKING BRAKE warning lamp illuminates when the parking brake is applied.