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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. Adjustments
Brake Pedal
1.
With ignition OFF and brakes cool,
apply brakes three or four times, or until brake pedal becomes firm,
in order to deplete brake booster power reserve.
2.
Adjust steering wheel angle to highest
tilt position ...