2008 Saturn Astra Owner's Manual - Page 64

2-4 Keys, Doors and Windows Matching Transmitter(s) to Your Vehicle Each RKE transmitter is uniquely coded to prevent another transmitter from unlocking the vehicle. If a transmitter is lost or stolen, a replacement can be purchased through your dealer/retailer. All transmitters need to be re-coded to match the new transmitter. The lost transmitter will no longer work after the new transmitters are re-coded. The vehicle can have a maximum of five transmitters coded to it. To replace the battery: 1. Extend the key. See Keys on page 2-2 for additional information. Remote Keyless Entry (RKE) System Operation c (Lock): Press to lock the doors, liftgate and fuel tank door. Battery Replacement Replace the battery if the Remote Control Battery check message appears in the DIC. See "Remote Control Battery Check" under DIC Warnings and Messages (Base and Uplevel Systems) on page 4-37. Notice: When replacing the battery, do not touch any of the circuitry on the transmitter. Static from your body could damage the transmitter. If the driver door is open, the doors will not lock. d (Unlock): Press to unlock the doors, liftgate and fuel tank door. Press and hold the windows. d to lower all 2. Open the RKE transmitter. 3. Remove the old battery. Do not use a metal object. 4. Insert the new battery, positive side facing up. Replace with a CR2032 or equivalent battery. 5. Close the RKE transmitter. Synchronization After changing the battery, turn the ignition to ON/RUN. This will synchronize the key.