How to Program a 2003 Chevrolet Silverado Keyless Entry Remote Fob Smart Key?
1. Close all vehicle doors. Then insert the key into the ignition.
2. Hold down the power UNLOCK button on the driver’s door panel-continue to hold down until instructed to release in step 4.
3. Turn the ignition switch to the ON-OFF-ON-OFF position in fairly rapid succession (as far as you can go without starting the engine).
4. Release the power unlock button on the door panel. The vehicle will lock and unlock the doors automatically.
5. Hold down the LOCK and UNLOCK buttons on the transmitter simultaneously until the door locks and unlocks. This step may take up to 30 seconds.
6. Repeat step 5 NOW for each additional transmitter (including any existing transmitters).
7. Turn the ignition switch to the ON position in order to exit the transmitter programming mode.