GMC 2006 Sierra 1500 Pickup Owner's Manual page 241

Do not drive your vehicle with overheated
transmission fluid or while the transmission
temperature warning is displayed.
If the transmission fluid in the vehicle gets hot, this
message will appear on the DIC along with a continuous
chime. 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 will clear and the chime will stop when the fluid
temperature reaches a safe level. See Transmission
Temperature Gage on page 3-44.
TRANSMISSION HOT
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 the transmission
temperature warning is displayed.
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.
If the vehicle has the Tow/Haul mode, use this feature
if the transmission is operating at higher temperatures
and/or the following situations exist, which can cause
the transmission to operate at higher temperatures:
•
Towing a trailer
•
Hot outside air temperatures
•
Hauling a large or heavy load
•
Over-loading
•
Low transmission fluid level
•
High transmission fluid level
•
Restricted air flow to the radiator and the auxiliary
transmission oil cooler
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 (Gasoline
Engine) on page 6-4 for the transmission your vehicle is
equipped with for the proper transmission maintenance
intervals. Also see Transmission Temperature Gage on
page 3-44 for more information.
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