1996 Chevrolet Blazer Owner's Manual - Page 232

Engine Fan Noise This 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 every day driving conditions, the clutch is not engaged. This improves fuel economy and reducesfan noise. Under heavy vehicle loading, trailer towingand/or high outside temperatures, the'fan speed increases when the clutch 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 whenadditional cooling is not required and the clutchdisengages. You may also hear this fan noise when you start the engine. It will go away as the fan clutch 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 likelyto leak out slowly. But if you should ever have a "blowout," here area few tips about what to expect and what do: to If a front tire fails, the flat tire willcreate a drag that pulls the vehicle toward thatside. 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 yourfoot from the accelerator pedal. Getthe vehicle under control by steering the way you want the vehicle go. It may be to very bumpy and noisy, butyou 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. 5-20