GMC T-Series 1999, Руководство пользователя, Страница: 105 / 344

yellow blue
3-3
Heating
On cold days, use the fan control lever with the
temperature selector all the way toward the red area.
When the inside of the vehicle has reached a
comfortable temperature, maintain it by using the
temperature selector lever.
If your vehicle is equipped with a diesel engine, and you
idle your engine for a long time when it’s cold outside,
your heater may blow out cool air. This is normal. When
you increase the engine speed under load, your heater
should blow out warmer air. If it doesn’t, your coolant
level may be low. See “Engine Coolant” in the Index to
check your coolant level.
When idling your diesel engine for a prolonged period
of time, you can use RECIRC to recirculate the air in the
cab to help maintain interior heat. This will preserve
engine coolant temperature and cab heat when idling
cannot be avoided.
Using RECIRC while in a heating mode is not
recommended while driving because interior window
fogging can result.
Air Conditioning (If Equipped)
When you first turn on your vehicle’s air conditioning,
open the windows long enough to clear the vehicle of
hot air, then close them. Using RECIRC can also help.
For normal cooling on hot days, use A/C with the
temperature selector toward the blue area.
See “Air Conditioning Filter” in the Index for
information on cleaning the air conditioning filter.
Defrosting
Use DEFROST with the temperature selector toward the
red area when there is fog or ice on the windshield. This
will direct airflow toward the windshield and front side
windows. Set the temperature selector toward the red
area and the fan control at a comfortable level. When the
windshield is clear, use the temperature selector lever
and the fan control to maintain a comfortable
temperature level.