How to Code a New Key for a 2003 Chevrolet Truck

Chevrolet trucks often offer smart-key technologies; this includes the 2003 models. Smart keys, or transponder keys, are used to electronically sync with your engine. Once you set the code only a programmed key can be used to start your engine. You can complete the process in minutes using only your key and no professional equipment.

• 1

  Turn your new key in the car's ignition to the "on" position.

• 2

  Leave the key in the "on" position for 10 1/2 minutes. Turn it "off" within another 45 seconds.

• 3

  Repeat the procedure an additional two times, for a total of three cycles. End with the key in the "off" position.

• 4

  Turn the key back to the "on" position. Start the vehicle with the key to end the coding process.