GMC 2010 Yukon/Yukon XL Owner's Manual page 293

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. This message clears and
the chime stops when the fluid temperature reaches a
safe level.
This message displays and a chime sounds if a turn
signal is left on for 3/4 of a mile (1.2 km). Move the turn
signal/multifunction lever to the off position.
This message displays when the windshield washer
fluid is low. Fill the windshield washer fluid reservoir as
soon as possible. See Engine Compartment Overview
on page 6 16 for the location of the windshield washer
fluid reservoir. Also, see Windshield Washer Fluid on
page 6 41 for more information.
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