Keyless Entry Remote Programming Instructions – 2003 Oldsmobile Alero

Important Notice: The 2003 Oldsmobile Alero does not support onboard programming for keyless entry remote fobs. Remote programming must be completed by a qualified technician using specialized diagnostic equipment.

Programming Procedure:

• Step 1: Contact a certified automotive technician or an authorized service provider experienced in keyless entry systems and equipped with the correct diagnostic tools for your vehicle.
• Step 2: Verify that the technician uses software compatible with the Alero’s electronic control unit to ensure secure and accurate programming.
• Step 3: If the vehicle is in drivable condition, consider taking it to the technician’s service location. This may help avoid additional charges for mobile service.
• Step 4: Schedule an appointment in advance to confirm tool availability and ensure the technician is prepared for your vehicle's model and year.
• Step 5: Bring all existing remotes with you. In many systems, all remotes must be reprogrammed together during the same session to ensure continued functionality.
• Step 6: Upon arrival, the technician will connect a diagnostic tool to your vehicle’s onboard diagnostic port, usually located beneath the dashboard.
• Step 7: The technician will initiate the key programming process through specialized software to link the new remote fob to your vehicle's internal system.
• Step 8: Once programming is complete, all remote features—including locking, unlocking, trunk access, and panic alarm—will be tested to confirm proper operation.
• Step 9: Personally test each remote before concluding the appointment to ensure all programmed fobs function as expected.
• Step 10: Store backup remotes in a secure location, and consider having an extra remote programmed for convenience or emergencies.