The standard instrument cluster contains a microprocessor. The instrument cluster microprocessor communicates with other modules in the vehicle over the Class 2 serial data line. The information passed over the Class 2 serial data line, along with dedicated circuits to specific sensors and modules, provides the inputs which are used to operate all the gauges, indicators and lamps in the cluster. The instrument cluster continuously processes class 2 serial data in order to determine the correct gauge values to display and the correct state of the indicators and lamps.

The high beam, turn signals, and panel lamps are the only replaceable bulbs in the instrument cluster. If the instrument cluster assembly is replaced, federal law requires that the odometer reading of the replacement unit be set to register the same mileage as the prior odometer. If the same mileage cannot be set, the law requires that the replacement odometer be set at zero and a label be installed on the drivers door frame in order to show the previous odometer reading and the date of replacement.

The instrument cluster includes the following components: