GMC Yukon 2007 Owner's Manual page 266

Timer
Press the trip/fuel button until TIMER displays.
This display can be used as a timer.
To start the timer, press the set/reset button while
TIMER is displayed. The display will show the
amount of time that has passed since the timer
was last reset, not including time the ignition is off.
Time will continue to be counted as long as the
ignition is on, even if another display is being shown
on the DIC. The timer will record up to 99 hours,
59 minutes and 59 seconds (99:59:59) after which
the display will return to zero.
To stop the timer, press the set/reset button briefly
while TIMER is displayed.
To reset the timer to zero, press and hold the
set/reset button while TIMER is displayed.
Transmission Temperature
Press the trip/fuel button until TRANS TEMP
displays. This display shows the temperature of
the automatic transmission fluid in either degrees
Fahrenheit (°F) or degrees Celsius (°C).
266
Instantaneous Economy and Active Fuel
Management™ Indicator
If your vehicle has this display, press the trip/fuel
button until INST ECONOMY V8 MODE displays.
This display shows the current fuel economy at a
particular moment and will change frequently as
driving conditions change. This display shows the
instantaneous fuel economy in miles per gallon
(mpg) or liters per 100 kilometers (L/100 km).
Unlike average economy, this screen cannot
be reset.
An Active Fuel Management™ indicator will
display on the right side of the DIC, while
INST ECONOMY displays on the left side. Active
Fuel Management™ allows the engine to
operate on either four or eight cylinders, depending
on your driving demands. When Active Fuel
Management™ is active, V4 MODE will display on
the DIC. When Active Fuel Management™ is
inactive, V8 MODE will display. See Active Fuel
Management™ on page 149 for more information.
Blank Display
This display shows no information.