2001 Chevrolet Impala Owner's Manual - Page 308

To change the passenger compartment air filter, use the following steps: 1. Turn off the ignition when the windshield wipers are in the up position. 2. Raise the hood. 3. Disconnect the windshield washer pump hose from the fender rail and air inlet grille. 4. Reposition the hood weatherstrip from the passenger's side of the vehicle (peel back halfway to center). 5. Remove the air inlet grille retainers. 6. Remove the air inlet grille. 7. Remove the air deflector grille in the compartment. 8. Remove the old passenger compartment air filter. 9. Then reverse the steps to install the new air filter. For the type of filter to use, see "Normal Maintenance Replacement Parts" in the Index. Automatic Transaxle Fluid When to Check and Change A good time to check your automatic transaxle fluid level is when the engine oil is changed. Change both the fluid and filter every 50,000 miles (83 000 km) if the vehicle is mainly driven under one or more of these conditions: D In heavy city traffic where the outside temperature regularly reaches 90_F (32_C) or higher. D In hilly or mountainous terrain. D When doing frequent trailer towing. D Uses such as found in taxi, police or delivery service. If you do not use your vehicle under any of these conditions, change the fluid and filter at 100,000 miles (166 000 km). See "Scheduled Maintenance Services" in the Index. 6-21