Instrument Cluster Description and Operation: Odometer

The instrument panel cluster (IPC) contains a season odometer and trip odometer A or B in the trip/fuel menu. Momentarily press the trip/fuel switch in order to cycle through the trip/fuel menu. Press the set/reset switch momentarily, while a trip odometer is displayed, in order to reset the trip odometer. Pressing the set/reset switch for 2 seconds will reset a trip odometer to the distance travelled since the last ignition cycle. The vehicle mileage and trip mileage is displayed as determined by the IPC. The IPC calculates the mileage based on the GMLAN vehicle speed information from the ECM PCM. The IPC receives the vehicle odometer information from the body control module (BCM) via a GMLAN serial data circuit. The odometer will display 'error' if an internal IPC memory failure is detected. The odometer displays either miles or kilometers as requested through the English/Metric screen in the DIC Vehicle Information Menu.