1994 GMC Safari Owner's Manual - Page 202

8. Then replace the pressure cap.At any time during this procedure if coolant begins to flow outof the filler neck, reinstall the pressure cap.Be sure the arrows on the pressurecap line up like this. Engine Fan Noise This vehicle has a clutchedengine 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 reduces fan noise. Under heavy vehicle loading, trailer towing and/or high outside temperatures, the fan speed increases whenthe clutch engages. So you may hear an increasein fan noise. This is norrnal and should be not mistaken as the transmission slippingor making extra shifts. It is merely the cooling system functioning properly. The fan will slow down when additional cooling is not required and theclutch disengages. You may also hear this fan noise when you start the engine. will go away It as the fan clutch disengages. If a Tire Goes Flat It's unusualfor a tire to "blow out" whileyou're driving, especially if you more likely to maintain your tires properly.If air goes out of a tire, it's much leak out slowly. But if you should ever have a "blowout,"here are a few tips about what toexpect and whatto do: If a front tire fails, the flat tire will create a drag that pulls thevehicle toward that side. Take your foot off the accelerator pedal and the grip steering wheel firmly.Steer to maintain lane position, then gentlybrake to a stop well out of the traffic lane. A rear blowout, particularly a curve, acts much like a skid and may on require the same correction you'd use in a skid. any rear blowout, remove In your foot from the accelerator pedal, Get the vehicle under control by steering the wayyou want the vehicle to go. It may be very bumpy and noisy, but you can still steer. Gently brake a stop, well off the road to if possible. If a tire goes flat, the next section shows how to use your jacking equipment to change a flat tire safely. 5-18