Gmc 2001 Savana User Manual download pdf (Page 253)

5-19

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

partially disengages.

You may also hear this fan noise when you start

the engine. It will go away as the fan clutch

partially disengages.

If a Tire Goes Flat

It’s unusual for a tire to “blow out” while you’re driving,

especially if you maintain your tires properly. If air goes

out of a tire, it’s much more likely to leak out slowly.

But if you should ever have a “blowout,” here are a few

tips about what to expect and what to do:

If a front tire fails, the flat tire will create a drag that

pulls the vehicle toward that side. Take your foot off the

accelerator pedal and grip the steering wheel firmly.

Steer to maintain lane position, and then gently brake to

a stop well out of the traffic lane.

A rear blowout, particularly on a curve, acts much like a

skid and may require the same correction you’d use in a

skid. In any rear blowout, remove your foot from the

accelerator pedal. Get the vehicle under control by

steering the way you want the vehicle to go. It may be

very bumpy and noisy, but you can still steer. Gently

brake to a stop

-- well off the road if possible.

If a tire goes flat, the next part shows how to use your

jacking equipment to change a flat tire safely.

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Gmc 2001 Savana User Manual Page 253