<h1>2012 GMC Sierra – Remote Key Fob Programming Guide</h1> <p><font size="3"> The 2012 Sierra does not offer onboard programming for remote key fobs. Specialized tools are required to complete the programming process. </font></p> <p><font size="3"><b>Programming Procedure:</b> </font></p> <ul> <li><font size="3">Step 1: Arrange for service with a certified technician or vehicle electronics specialist who has access to professional diagnostic equipment compatible with GM systems. </font></li> <li><font size="3">Step 2: If your Sierra is operational, consider driving it to the service location instead of requesting mobile service, which may help reduce service costs. </font></li> <li><font size="3">Step 3: Once on-site, the technician will connect a diagnostic interface tool to your vehicle’s onboard system to program and synchronize the new keyless entry remote. </font></li> <li><font size="3">Step 4: After programming, all features of the remote should be tested—including locking, unlocking, and panic functions—to confirm successful setup.</font></li> </ul>
