1996 Cadillac DeVille Owner's Manual - Page 221

Maintenance When TrailerTowing Your vehicle will need service more often when you're pulling a trailer. See the Maintenance Schedule more for on this. Things that are especially important in trailer operation are automatic transaxle fluid (don't overfill), engine oil, belt, cooling system and brake adjustment. Each of these is covered in this manual, and the Index If will help you find them quickly. you're trailering, it's a good idea to review these sections beforeyou start your trip. Check periodicallyto see that all hitch nuts and bolts are tight.