How to Program a Keyless Entry for a 2003 Chevy Suburban

by Leonardo R. Grabkowski
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According to, keyless-entry is standard on the 2003 Chevrolet Suburban, including on the base-LS model. This means you shouldn't have any trouble programming a new keyless-entry remote to your Suburban. The module is already installed, the remote just needs to be synchronized with the system. The process of programming a remote for the 2003 Suburban is the same as it is in all 2000 to 2006 models.

Step 1

Gather your car key and the keyless-entry remote you want to program to the Suburban. Only a factory-replacement remote will synchronize with the system.

Step 2

Verify that all of the doors are closed, including the rear-hatch door. Open the driver's door, take a seat and close the door.

Step 3

Place the key in the ignition, but do not turn it. Press and hold the "Unlock" switch on your door's master-control panel.

Step 4

Turn the ignition in the following sequence: on, off, on, off. When turning the key to "On," do not start the engine. Perform this rapidly for success.

Step 5

Release the "Unlock" switch. You'll hear the doors lock. If you don't, start the procedure over.

Simultaneously press "Lock" and "Unlock" on the keyless-entry remote. Hold these buttons down for about 30 seconds. You'll hear the door locks cycle again. This lets you know the remote is programmed. Turn the ignition to "On," then "Off" to finish.


  • If your keyless-entry remote will not synchronize to the 2003 Suburban, try replacing the battery. According to the 2003 Suburban's owner's manual, the battery is easily replaced by inserting a coin into the edges of the remote and twisting it to open the device. Once it's open, pull the bad battery out with your fingers and insert the new one. The Suburban's remote uses battery CR2032.

Items you will need

  • Factory-replacement remote

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