2011 Chevrolet Impala Owner's Manual - Page 225

Driving and Operating 9-17 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: . . Do not tow a trailer during break-in. See Trailer Towing on page 9‑45 for the trailer towing capabilities of your vehicle and more information. To shift out of P (Park), the ignition must be in ON/RUN and the brake pedal must be applied. Notice: Using a tool to force the key to turn in the ignition could cause damage to the switch or break the key. Use the correct key, make sure it is all the way in, and turn it only with your hand. If the key cannot be turned by hand, see your dealer. A (STOPPING THE ENGINE/ LOCK/OFF): When the vehicle is stopped, turn the ignition switch to LOCK/OFF to turn the engine off. Retained Accessory Power (RAP) will remain active. See Retained Accessory Power (RAP) on page 9‑21 This position locks the ignition. It also locks the transmission. This is the only position in which the ignition key can be inserted or removed. Following break‐in, engine speed and load can be gradually increased. 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. Ignition Positions . The ignition switch has four different positions.