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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. Vehicle, Road Test
The vehicle road test purpose
is to verify a customer concern or to verify a repair has been completed
correctly.
For transmission road test, ensure
that transmission or transaxle is brought to operating temperature and all
forward gears and reverse gear engage pr ...