GMC 2003 Sierra - Manual (Page 179)

Operation Tips
• Keflp !iie hood arwJ front air iniets free of ice, snow,
or any other obstruction (skKJh as leaves), The
heater and defroster will work far bettor, reducing
the chance of togging the inside of your windows.
■ Keep the air path under the front ssats clear of
objects. This helps air to circulate throughout your
vehicle.
+ Adding outside equipmenl to the front of your vehicle,
such as hcod-air deflectorSn elo.^ may alfect The
performance of the heating and air conditionit>g
systenrr. Check with your dealer before adding
equipment to the outside of your vehicle.
Dual Automatic Climate Control
System
Your vehicle may hava tha optionall dual automatic
climate control system Wilh this syslonn you can control
the heating^ coolmg and vontifation for your vehicle.
If your vehide is equipped with the dual aulomatic
climate conlrol system, memory seals, ar>d meimory
mirrors, you can store and recall the climate control
settings for lemperatuna, air delivery mode* and
fan speed for two different ditvers. The person-al choice
settings recalled are determined by the transmitter
used to enter the vehicle. After Ihe buHon with
the unlock symbol on a remote keyless aniry (ransmitter
is pressed* the climate control will adjust to the last
settings of the identified driver. The settings can also be
3-£4