<h1>2025 GMC Sierra Smart Key Programming Instructions</h1> <p><font size="3"><b> Important Notice:</b> This vehicle does not support DIY programming for smart key fobs. Programming is technician-only. </font></p> <p><font size="3"><b>Programming Instructions:</b> </font></p> <ul> <li><font size="3">Step 1: Connect to the vehicle using authorized GM diagnostic tools. </font></li> <li><font size="3">Step 2: Follow on-screen instructions to pair each remote. </font></li> <li><font size="3">Step 3: Exit programming mode once all remotes are registered. </font></li> <li><font size="3">Step 4: Test all keyless functions to confirm successful setup.</font></li> </ul>
