1993 Oldsmobile Bravada Owner's Manual - Page 192

Problems on the Road Engine Fan Noise This vehicle has a clutched engine cooling fan. Whenthe clutch is engaged, the fBn spins faster to provide more air to cool the engine. In most everyday driving conditions the clutch is not engaged. This improves fuel economy and reduces fan noise. Under heavy vehicle loading, trailer towing and/or high outsidetemperatures, the fhn speed increases whenthe 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 when additional cooling is not required andthe clutch disengages. You may also hear this fan noise when you start the engine. Itwill go away as the fan clutch disengages. Ifa Tire Goes Hat 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 ifyou should ever have a "blowout:' here are a few tips about what to expect and what do: to If a front tire fails, the flat tire will create a drag that pulls vehicle the toward that side. Take your foot off the accelerator pedal and grip the steering wheel firmly. Steer to maintainlane position, then gently brake to a stop well out of the trafficlane. A rear blowout, particularly on acurve, acts much like a skid and may require the same correction you'd use in askid. 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 roadif possible. If your tire goes flat, the next section shows how to use your jacking equipment to change a flat safely. tire