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If equipped, this gauge is located near the driver side of the instrument panel cluster.
This gauge indicates vacuum during light to moderate throttle and boost under heavier throttle.
This gauge displays the air pressure level in the intake manifold before it enters the engine's combustion chamber.
This gauge is automatically centered at zero every time the engine is started. Actual vacuum or boost is displayed from this zero point. Changes in ambient pressure, such as driving in mountains and changing weather, will slightly change the zero reading.
Fuel Gauge
Reconfigurable Performance Display (RPD)Chevrolet Cobalt Service & Repair Manual. Malfunction Indicator Lamp, Diagnosis & Testing
The Malfunction Indicator Lamp
(MIL) is located on the Instrument Panel Cluster (IPC). The MIL informs
the driver that an emission system fault has occurred and that the engine
control system requires service. The Engine Control Module (ECM) monitors
the MIL control circuit fo ...