GMC VE UTE Series Owner's Handbook Manual page 43

1A-37
Chapter 1A
DASHBOARD
3
mAnuAL HEATER, AIR CondITIonIng cont.
noTES
Unsealed roads (prevention of dust entry)
When following another vehicle on unsealed roads (and the dust is airborne), select
recirculation. If the dust is not airborne select outside air (recirculation off) and set
the fan to high speed. This builds up positive air pressure to help prevent dust entry.
Ensure in both cases that all windows are closed.
Note Recirculation reuses interior air and is therefore not recommended for long
periods of time.
Automatic transmission
3
If the vehicle is stopped for long periods in hot weather with the engine running and
the air conditioning operating, select N (neutral) or P (park) with the transmission gear
selector.
Hissing
Occasionally a slight hissing sound may be heard for a short time when the air
conditioning switches off and pressure in the system equalises. This is normal.
Water
Water condensation forms when the air conditioning is operating, this condensation
is discharged underneath the vehicle. Therefore, traces of clean, clear water on the
ground underneath the vehicle are normal under these circumstances.
Engine performance/fuel economy
The air conditioning uses power from the vehicle's engine. A small decrease in engine
power and a slight increase in fuel consumption will be noticed when the air conditioning
is in use. When driving at high speeds, the air conditioning compressor may switch off
momentarily so that full engine power is available.
The system is protected by switches that guard against abnormal loads and loss of
refrigerant. The air conditioning compressor may switch off until the fault is rectified.
Have the system checked by a Holden Dealer if this occurs.
Cigarette smoke
If occupants are smoking, it is recommended that the recirculate position not be used.
Note Recirculate mode reuses interior air and is therefore not recommended for long
periods of time.
Regular running
It is important that once every 2 weeks, with the engine running, the air conditioning
is switched on for 5 to 10 minutes (even in winter) to lubricate the air conditioning
system seals.
Pollen/dust filter
A passenger compartment air filter may be fitted to filter outside air entering the vehicle.
The filter removes contaminants such as pollen and dust. This can be fitted at your
request by your Holden Dealer.