Check Coolant Temp; Engine Overheated; Low Coolant - GMC 2001 Yukon XL Owner's Manual

The following situations can cause the transmission to
operate at higher temperatures:
D
Towing a trailer
D
Hot outside air temperatures
D
Hauling a heavy load
D
Low transmission fluid level
D
High transmission fluid level
D
Restricted air flow to the radiator and the auxiliary
transmission oil cooler (if equipped).
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" in the
Index for the proper transmission maintenance intervals.

Low Coolant

The engine may overheat. See "Engine Coolant" in the
Index and have your vehicle serviced as soon as you can.
This message is displayed
when the cooling system is
low on coolant.

Check Coolant Temp

Check the coolant temperature gage and the coolant
level. See "Engine Coolant" and "Engine Coolant
Temperature Gage" in the Index. See "Engine
Overheating" in the Index for further information.

Engine Overheated

This message will be displayed after the air conditioning
system has automatically turned off for the engine
coolant protection mode. See "Engine Overheating" in
the Index for further information.
This message is displayed
when the cooling system
temperature gets hot.
This message is displayed
when the cooling system
temperature gets too hot.
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