GMC Sierra Hybrid 2011 Owner's Manual page 24

5-4 Instruments and Controls
Listed are four situations that may
occur with the fuel gauge, none of
these indicate a problem:
At the gas station, the fuel
pump shuts off before the
gauge reads F (full).
It takes a little more or less fuel
to fill up than the fuel gauge
indicated. For example, the
gauge may have indicated the
tank was half full, but it actually
took a little more or less than
half the tank's capacity to fill
the tank.
The gauge moves a little while
turning a corner or while
accelerating.
The gauge does not go back to
E (empty) when the ignition is
turned off.
Fuel Economy Gauge
Metric
English
This gauge shows displays how
efficiently the vehicle is being
driven.
There are three zones on the drive
efficiency gauge.
Green Zone: Fuel efficient driving
behavior makes the indicator
display in the green zone on the
gauge.