CHEVROLET 2010 HHR - Manual (Page 200)

Boost Gage
For vehicles with this gage, it indicates vacuum during
light to moderate throttle and boost under heavier
throttle.
This gage displays the air pressure level in the intake
manifold before it enters the engine’s combustion
chamber.
It 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.
Reconfigurable Performance
Display (RPD)
For vehicles with the RPD, the screen displays
information that can be used to monitor vehicle
performance. The RPD knob located next to the screen
is used to configure the display and select information
to be viewed.
A short video plays whenever the ignition key is turned
on. Press the RPD knob to stop the video and go
directly to RPD displays.
United States Canada
RPD Screen Example US Version Shown, Canada
Similar (French Display Currently Not Available)
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