1995 GMC Safari Owner's Manual - Page 168

Driving On Grades Reduce speed and shift to a lower gear before you start down a long or steep downgrade. If you don't shift down, you might have to use your brakes so much that they would get hot andno longer work well. On a long uphill grade, shift down and reduce your speedto around 45 mph (70 km/h) to reduce the possibility of engine and transmission overheating. When towing at high altitude on steep uphill grades, consider the following: Engine coolant will boil at a lower temperature than at normal altitudes. If you turn your engine off immediately after towing at high altitudeon steep signs similar to engine overheating. uphill grades, your vehicle may show To avoid this, let the engine run while parked (preferably level ground) on with the automatic transmission in PARK(P) for a few minutes before turning the engine off. If you do get the overheat warning, see "Engine Overheating" in the Index. Parking on Hills You really should not park your vehicle, with a trailer attached, on a hill. If something goes wrong, your rig could startto move. People can beinjured, and both your vehicle and the trailer can be damaged. But if you ever have to park your rig on a hill, here's how doit: to 1. Apply your regular brakes, but don't shift into PARK (P) yet. Turn your wheels into the curb when facing downhill and away from the curb when facing uphill. 2. Have someone place chocks under the trailer wheels. 3. When the wheel chocks are in place, release the regularbrakes until the chocks absorb the load. 4. Reapply the regular brakes.Then apply your parking brake, and shift to PARK (P). 5. Release the regular brakes. When You Are Ready to Leave After Parking on a Hill 1. Apply your regular brakes and hold the pedal down while you: 0 0 0 Start your engine; Shift into a gear; and Release the parking brake. 2. Let up on the brake pedal. 3. Drive slowly until the traileris clear of the chocks. 4. Stop and have someone pick up and store the chocks. 4-32