Cab Air Filter; Microphone - Mack Granite GU Series Operator's Handbook Manual

Cab Air Filter

To provide comfortable and clean fresh air in the cab, the heating and air conditioning
system is designed with a replaceable filter.
Under normal operating conditions the filter should be replaced every 6 months to
ensure the efficiency of the heating and air conditioning system. Failure to replace
the filter may cause damage to heater/AC components.

Microphone

The microphone is located above the driver in the headliner. It is available on
the Mid-Level radio with Blue Tooth/Hands free option. This is what is used to
talk into when the phone is connected to the truck. For more information on the
microphone, please refer to the Radio Manual that is supplied with the vehicle.
INSTRUMENTS AND CONTROLS 99
Microphone
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