Transmission Messages; Tire Low Add Air To Tire; Service 4 Wheel Drive; Transmission Hot Idle Engine - GMC 2012 Yukon/Yukon XL Owner's Manual

is re-learning the tire positions on
your vehicle. The tire positions must
be re-learned after rotating the tires
or after replacing a tire or sensor.
See Tire Inspection on page 10 62,
Tire Rotation on page 10 62, Tire
Pressure Monitor System on
page 10 58, and Tire Pressure on
page 10 56 for more information.

TIRE LOW ADD AIR TO TIRE

On vehicles with the Tire Pressure
Monitor System (TPMS), this
message displays when the
pressure in one or more of the
vehicle's tires needs to be checked.
This message also displays LEFT
FRT (left front), RIGHT FRT (right
front), LEFT RR (left rear),
or RIGHT RR (right rear) to indicate
the location of the low tire. The low
tire pressure warning light will also
come on. See Tire Pressure Light
on page 5 26. You can receive more
than one tire pressure message at a
time. To read the other messages
that may have been sent at the
same time, press the set/reset
button or the trip odometer reset
stem. If a tire pressure message
appears on the DIC, stop as soon
as you can. Have the tire pressures
checked and set to those shown on
the Tire Loading Information label.
See Tires on page 10 48, Vehicle
Load Limits on page 9 16, and Tire
Pressure on page 10 56. The DIC
also shows the tire pressure values.
See DIC Operation and Displays
(With DIC Buttons) earlier in this
section.

Transmission Messages

SERVICE 4 WHEEL DRIVE

This message displays if a problem
occurs with the four-wheel-drive
system. If this message appears,
stop as soon as possible and turn
off the vehicle. Make sure the key is
in the LOCK/OFF position for at
least one minute and then restart
the vehicle and check for the
message on the DIC display.
Instruments and Controls
If the message is still displayed or
appears again when you begin
driving, the four-wheel-drive system
needs service. See your dealer.
TRANSMISSION HOT IDLE
ENGINE
If you drive the vehicle
while the transmission fluid is
overheating and the transmission
temperature warning is displayed
on the instrument panel cluster
and/or DIC, you can damage the
transmission. This could lead to
costly repairs that would not be
covered by the warranty. Do not
drive the vehicle with overheated
transmission fluid or while the
transmission temperature
warning is displayed.
This message displays along with a
sound if the transmission fluid in the
vehicle gets hot. Driving with the
transmission fluid temperature high
can cause damage to the vehicle.
Stop the vehicle and let it idle to
allow the transmission to cool.
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