5-19
5. Then replace the pressure cap. Be sure the pressure
cap is hand
-
tight.
Engine Fan Noise
Your vehicle has a clutched engine cooling fan. When
the clutch is engaged, the fan spins faster to provide
more air to cool the engine. In most everyday driving
conditions, the fan is spinning slower and the clutch is
not fully engaged. This improves fuel economy and
reduces fan noise. Under heavy vehicle loading, trailer
towing and/or high outside temperatures, the fan speed
increases as the clutch more fully engages. So you may
hear an increase in fan noise. This is normal and should
not be mistaken as the transmission slipping or making
extra shifts. It is merely the cooling system functioning
properly. The fan will slow down when additional
cooling is not required and the clutch disengages.
You may also hear this fan noise when you start
the engine. It will go away as the fan clutch
partially disengages.
Summary of Contents for 2002 Avalanche
Page 1: ......
Page 2: ......
Page 11: ...ix ...
Page 166: ...2 98 The Instrument Panel Your Information System ...
Page 384: ...6 61 GM Vehicle Care Appearance Materials ...
Page 391: ...6 68 ...
Page 403: ...Scheduled Maintenance 7 7 ...
Page 404: ...Scheduled Maintenance 7 8 ...
Page 422: ...7 26 Maintenance Record DATE ODOMETER READING SERVICED BY MAINTENANCE PERFORMED ...
Page 423: ...7 27 Maintenance Record DATE ODOMETER READING SERVICED BY MAINTENANCE PERFORMED ...
Page 424: ...7 28 Maintenance Record DATE ODOMETER READING SERVICED BY MAINTENANCE PERFORMED ...
Page 436: ...8 12 ...
Page 437: ...8 13 ...