Engine Fan Noise
If 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.
If your vehicle has electric cooling fans, you may
hear the fans spinning at low speed during
most everyday driving. The fans may turn off if no
cooling is required. Under heavy vehicle loading,
trailer towing, and/or high outside temperatures, or
if you are operating your air conditioning system,
the fans may change to high speed and you
may hear an increase in fan noise. This is normal
and indicates that the cooling system is
functioning properly. The fans will change to low
speed when additional cooling is no longer
required.
Power Steering Fluid
See Engine
Compartment Overview
on page 480 for
reservoir location.
514
Summary of Contents for Silverado Classic 2007
Page 6: ...These are some examples of symbols that may be found on the vehicle 6 ...
Page 106: ... NOTES 106 ...
Page 207: ... NOTES 207 ...
Page 354: ... NOTES 354 ...
Page 484: ...When you open the hood on the 8 1L V8 engine here is what you will see 484 ...
Page 606: ...606 ...
Page 634: ...Engine Drive Belt Routing A Air Conditioning Compressor V6 Engines V8 Engines 634 ...
Page 660: ... NOTES 660 ...