GMC 2010 T-Series, Owner'S Manual

Page: 115 / 294

Air Pressure Gage
If your vehicle has air
brakes, this gage shows
the air pressure for both
your front and rear brake
systems.
If the needle on the gage indicates that the air pressure
is below 415 kPa (60 psi), the low air warning light will
come on. An alarm will also sound if this happens.
The bottom yellow pointer shows the pressure available
for the front secondary system, while the top white
pointer shows pressure for the rear primary system.
There should be no more than 28 kPa (4 psi ) difference
showing between the systems.
Don't drive until both pointers are showing at least
827 kPa (120 psi), so you'll have enough air if you
need to apply your brakes.
Hourmeter Gage
To access the engine hourmeter gage press the trip
odometer button three times.
The instrument panel cluster displays the accumulated
engine run time hours using the reconfigurable
odometer display. The engine run time hours displays
only when the ignition is in the LOCK/OFF or ACC/
ACCESSORY position and the trip reset switch is
pressed for about four seconds.
When the ignition is in the LOCK/OFF or ACC/
ACCESSORY position, the instrument panel cluster
displays the engine accumulated hours for up to
30 seconds. The value of the accumulated hours
does not change when the battery is disconnected.
The hourmeter resets to 0.0 when 10,000 hours are
accumulated. The instrument panel cluster begins to
reaccumulate the engine run time hours from 0.0 hours.
3-39