2012 Chevrolet Impala Owner's Manual - Page 183

Climate Controls . 8-5 If the airflow seems low when the fan is at the highest setting, the passenger compartment air filter, if equipped, may need to replaced. For more information, see Passenger Compartment Air Filter on page 8‑5 and Maintenance Schedule on page 11‑3. If fogging reoccurs while in vent or bi-level modes with mild temperature throughout the vehicle, turn on the air conditioner to reduce windshield fogging. Maintenance Passenger Compartment Air Filter The vehicle has a passenger compartment particulate air filter. It is located in the engine compartment, below the air inlet grille on the passenger side. The filter traps most of the pollen from air entering the climate control system. It needs to be changed periodically to ensure system performance. For information on how often to change the passenger compartment air filter, see Maintenance Schedule on page 11‑3. To change the passenger compartment air filter: 1. Turn off the ignition when the windshield wipers are in the up position. 2. Raise the vehicle hood. 3. Pull back the hood weatherstrip from the passenger side of the vehicle halfway to center. . 4. Remove the air inlet grille retainers.