2001 Chevrolet Impala Owner's Manual - Page 324

6. Turn the old bulb counterclockwise and remove it from the retaining ring by gently pulling it away from the headlamp. 7. Remove the electrical connector from the bulb by raising the lock tab and pulling the connector away from the bulb's base. 8. Install the electrical connector to the bulb. 9. Install the new bulb by inserting the smallest tab on the bulb base into the matching notch in the retaining ring. Turn the bulb a quarter-turn clockwise until it stops. 10. Reinstall the dust caps and reconnect the electrical connector. 11. Reverse Steps 1 through 5 to reinstall the headlamp assembly. Then, check the lamps. Headlamp Aiming If your vehicle is damaged in an accident, the headlamp aim may be affected. Aim adjustment to the low beam may be necessary if it is difficult to see lane markers (for horizontal aim), or if oncoming drivers flash their high beams at you (for vertical aim). If you believe your headlamps need to be re-aimed, we recommend that you take your vehicle to the dealer for service. However, it is possible for you to re-aim your headlamps by following the procedure in the service manual for your vehicle. Fog Lamps (If Equipped) The fog lamps are located in the lower part of the front bumper below the headlamps. To change the fog lamp bulbs do the following: 1. Remove the T15 TORXR screw. 2. Pull out the lamp assembly. 3. Remove the old bulb. 4. Insert new bulb into the assembly. 5. Reinstall the lamps and screw. 6-37