GMC Yukon XL Denali 2005 Owner's Manual page 202

TRANSMISSION HOT
If the transmission fluid temperature becomes high, this
message will appear on the DIC display.
When the transmission enters the protection mode, you
may notice a change in the transmission shifting
patterns. When the transmission fluid temperature
returns to normal, the display will turn off and the
transmission shifting patterns will return to normal.
Notice: If you drive your 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
your warranty. Do not drive your vehicle with
overheated transmission fluid or while transmission
temperature warning is displayed.
The following situations can cause the transmission to
operate at higher temperatures:
•
Towing a trailer
•
Hot outside air temperatures
3-60
•
Hauling a large or heavy load
•
Over-loading
•
Low transmission fluid level
•
High transmission fluid level
•
Restricted air flow to the radiator
A temporary solution to hotter transmission operating
temperatures may be to let the transmission cool down. If
the transmission is operated at higher temperatures on a
frequent basis, see Scheduled Maintenance on page 6-4
for the proper transmission maintenance intervals.
TURN SIGNAL ON
If a turn signal is left on for 3/4 of a mile (1.2 km), this
message will appear on the display and you will hear a
chime. Move the turn signal/multifunction lever to the
off position. Pressing any of the four DIC buttons,
if equipped, will clear the message from the DIC display.
If your vehicle is not equipped with the four DIC
buttons, pressing the trip odometer reset stem will clear
the message from the DIC display.