1998 GMC Envoy Owner's Manual - Page 185

Driving in Water Light rain causes n o special off-road driving problems. But heavy rain can mean flash flooding, and flood waters demand extreme caution. Find o u t how deep the water is before you drive through it. If' it's deep enough to cover your wheel hubs. axles or exhaust pipe, don't try it -- you probably won't get through. Also, water that deep can damage your axle and other vehicle parts. If the water isn't too deep, then drive through it slowly. At fast speeds, water splashes o n your ignition system and your vehicle can stall. Stalling can also occur if you get your tailpipe under water. And, as long as your tailpipe is under water? you'll never be able to start your engine. When you go through water. remember that when your brakes get wet, it may take you longer to stop. ' Driving through rushing water can be dangerous. Deep water can sweep your vehicle downstream If and you and your passengers could drown. it's only shallowwater, it can still wash away the ground from under your tires, and you could lose traction and roll the vehicle over. Don't drive through rushingwater. See "Driving Through Wdter" in the Index for more information on driving through water. After Off-Road Driving Remove any brush or debris that has collected on the underbody, chassis or under the hood. These accumulations can be a fire hazard. After operation i n mud or sand, have the brake linings cleaned and checked. These substances can cause glazing and uneven braking. Check the body structure, steering, suspension, wheels, tires and exhaust system for da1nage. Also, check the fuel lines and cooling system for any leakage. 4-26