2001 Chevrolet Impala Owner's Manual - Page 81

If your vehicle has the optional content theft-deterrent system, the first time the remote unlock is received, three flashes and chirps will be seen to indicate an alarm condition has occurred since last arming. See "Content Theft-Deterrent System" in the Index. Illumination on Remote Activation This feature provides interior illumination when a remote keyless entry unlock command is received and executed, the trunk release button is pressed or when the panic alarm is activated. The interior lamps will illuminate until the ignition is turned to ON or until an illumination period of 40 seconds has elapsed or the doors are locked with the power lock switch or the remote keyless entry transmitter. If a door is opened during the illumination period, the timed illumination will be canceled, and the interior lamps will remain on since a door is open. Matching Transmitter(s) to Your Vehicle Each remote keyless entry transmitter is coded to prevent another transmitter from unlocking your vehicle. If a transmitter is lost or stolen, a replacement can be purchased through your dealer. Remember to bring any remaining transmitters with you when you go to your dealer. When the dealer matches the replacement transmitter to your vehicle, any remaining transmitters must also be matched. Once your dealer has coded the new transmitter, the lost transmitter will not unlock your vehicle. Each vehicle can have only four transmitters matched to it. If you prefer, you can complete this procedure yourself. See "Vehicle Customization Settings" in the Index for more information. Battery Replacement Under normal use, the battery in your remote keyless entry transmitter should last about three years. You can tell the battery is weak if the transmitter won't work at the normal range in any location. If you have to get close to your vehicle before the transmitter works, it's probably time to change the battery. 2-11