2003 GMC Sierra

<h1>2003 GMC Sierra – Programming Keyless Remote Fobs</h1> This model allows you to program new or existing remotes using a built-in procedure through the ignition and door controls. <ul> <li>Step 1: Close all vehicle doors. </li> <li>Step 2: Insert the key into the ignition but do not turn it yet. </li> <li>Step 3: Press and hold the UNLOCK button on the driver’s door and keep it held. </li> <li>Step 4: Cycle the ignition quickly in this order: ON → OFF → ON → OFF (Do not start the engine during this process.) </li> <li>Step 5: Let go of the UNLOCK button. The locks will cycle to show the vehicle has entered programming mode. </li> <li>Step 6: On your remote, press and hold LOCK and UNLOCK together. Keep holding until the door locks cycle again. </li> <li>Step 7: Repeat for all additional remotes. </li> <li>Step 8: Turn ignition to ON to exit programming mode. </li> <li>Step 9: Remove the key and test the remotes.</li> </ul>

2003 GMC Sierra

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