2013 Chevrolet Impala Owner Manual - Page 200

9-20 Driving and Operating WARNING (Continued) . Running the Vehicle While Parked It is better not to park with the engine running. If the vehicle is left with the engine running, follow the proper steps to be sure the vehicle will not move. See Shifting Into Park on page 9‑17 and Engine Exhaust on page 9‑19. If parking on a hill and pulling a trailer, see Driving Characteristics and Towing Tips on page 9‑36. There are holes or openings in the vehicle body from damage or aftermarket modifications that are not completely sealed. Automatic Transmission The automatic transmission has a shift lever located on the console between the seats, or on the steering column. Gear positions are indicated on the instrument cluster. If unusual fumes are detected or if it is suspected that exhaust is coming into the vehicle: . Drive it only with the windows completely down. Have the vehicle repaired immediately. . Never park the vehicle with the engine running in an enclosed area such as a garage or a building that has no fresh air ventilation.