2004 Cadillac DeVille Owner's Manual - Page 278

Driving on Grades Reduce speed and shift to a lower gear before you start down a long or steep downgrade. If you do not shift down, you might have to use your brakes so much that they would get hot and no longer work well. On long uphill grades, reduce speed to 45 to 50 mph (70 to 90 km/h) and avoid prolonged use of SECOND (2) gear and engine speeds above 3800 rpm. Climbing grades steeper than four percent at temperatures above 90° F (32° C) with a loaded vehicle and trailer is not recommended. The cooling system may temporarily overheat. See Engine Overheating on page 5-29. Parking on Hills {CAUTION: You really should not park your vehicle, with a trailer attached, on a hill. If something goes wrong, your rig could start to move. People can 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 is how to do it: 1. Apply your regular brakes, but do not shift into PARK (P). 2. Have someone place chocks behind the trailer wheels. 3. When the wheel chocks are in place, release the regular brakes until the chocks absorb the load. 4. Reapply the regular brakes. Then shift into PARK (P) firmly and apply your parking brake. 5. Release the regular brakes. 4-44