1998 Pontiac Grand Prix Owner's Manual - Page 232

Driving On Grades Reduce speed and shift to a lower gear you start before down a long or steep downgrade. you don't shift If down, you might have to use your brakes much that so they would gethot and no longer work well. On a long uphill grade, shift down and reduce your speed to around mph (70km/h) to reduce the 45 possibility of engine and transaxle overheating. Parking on Hills You really should not park your vehicle, a trailer with If attached, on a hill. something goes wrong, your rig could startto move. Peoplecan be injured, 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 to do it: 1. Apply your regular brakes, but don't shift into PARK (P) yet. If you have overdrive, you may want to drive in THIRD (3), instead of DRIVE (D). 2. Have someone place chocks under trailer wheels. the 3. When the wheel chocks are in place, release the regular brakes until the chocks absorb the load. 4. Reapply the regular brakes. Then apply your parking brake, and then shift to PARK (P). 5. Release the regular brakes. 4-39