Driving and Operating 245or other objects. Avoid jerky orsudden maneuvers. Signal well inadvance.If the trailer turn signal bulbs burnout, the arrows on the instrumentcluster will still flash for turns. It isimportant to check occasionally tobe sure the trailer bulbs are stillworking.Driving on GradesReduce speed and shift to a lowergear before starting down a long orsteep downgrade. If thetransmission is not shifted down, thebrakes might get hot and no longerwork well.Vehicles can tow in D (Drive). Shiftthe transmission to a lower gear ifthe transmission shifts too oftenunder heavy loads and/or hillyconditions.When towing at high altitude onsteep uphill grades, consider thefollowing: Engine coolant will boil ata lower temperature than at normalaltitudes. If the engine is turned offimmediately after towing at highaltitude on steep uphill grades, thevehicle may show signs similar toengine overheating. To avoid this,let the engine run while parked,preferably on level ground, with theautomatic transmission in P (Park)for a few minutes before turning theengine off. If the overheat warningcomes on, see Engine Overheating0 269.Parking on Hills{ WarningParking the vehicle on a hill withthe trailer attached can bedangerous. If something goeswrong, the rig could start to move.People can be injured, and boththe vehicle and the trailer can bedamaged. When possible, alwayspark the rig on a flat surface.If parking the rig on a hill:1. Press the brake pedal, but donot shift into P (Park) yet. Turnthe wheels into the curb iffacing downhill or into traffic iffacing uphill.2. Have someone place chocksunder the trailer wheels.3. When the wheel chocks are inplace, release the regularbrakes until the chocks absorbthe load.4. Reapply the brake pedal. Thenapply the parking brake andshift into P (Park).5. Release the brake pedal.Leaving After Parking on a Hill1. Apply and hold the brakepedal.2. Start the engine.3. Shift into a gear.4. Release the parking brake.5. Let up on the brake pedal.6. Drive slowly until the trailer isclear of the chocks.7. Stop and have someone pickup and store the chocks.
