2010 GMC Acadia Owner's Manual - Page 273

Driving and Operating 9-17 { WARNING Things you put inside your vehicle can strike and injure people in a sudden stop or turn, or in a crash. . Starting and Operating New Vehicle Break-In Notice: The vehicle does not need an elaborate break-in. But it will perform better in the long run if you follow these guidelines: . . Put things in the cargo area of your vehicle. Try to spread the weight evenly. Never stack heavier things, like suitcases, inside the vehicle so that some of them are above the tops of the seats. Do not leave an unsecured child restraint in your vehicle. When you carry something inside the vehicle, secure it whenever you can. Do not leave a seat folded down unless you need to. . If you have all-wheel drive, keep your speed at 88 km/h (55 mph) or less for the first 805 km (500 miles). Do not drive at any one constant speed, fast or slow, for the first 805 km (500 miles). Do not make full-throttle starts. Avoid downshifting to brake or slow the vehicle. Avoid making hard stops for the first 322 km (200 miles) or so. During this time the new brake linings are not yet broken in. Hard stops with new linings can mean premature wear and earlier replacement. Follow this breaking-in guideline every time you get new brake linings. Do not tow a trailer during break-in. See Driving Characteristics and Towing Tips on page 9‑48 for the trailer towing capabilities of your vehicle and more information. . . . . Following break‐in, engine speed and load can be gradually increased. .