<h1>1999 GMC Yukon – Remote Fob Programming Instructions</h1> <p><font size="3">This model supports onboard programming using the OBDII Data Link Connector (DLC) found beneath the dashboard. Follow the steps below to program one or more remote fobs. </font></p> <p><font size="3"><b>Programming Procedure</b> </font></p> <ul> <li><font size="3">Step 1: Locate the Data Link Connector (DLC) under the driver’s side dashboard. – The connector is rectangular and wider across the top row. – Identify terminals 8 and 4 (refer to a DLC pinout diagram for accuracy if needed). </font></li> <li><font size="3">Step 2: Ensure that both terminal 8 and terminal 4 contain metal contacts. – Use a jumper wire to connect terminal 8 to terminal 4. – Keep the jumper wire connected for the duration of the programming process. – Within a few seconds, the door locks will cycle (lock and unlock), confirming that the vehicle is in programming mode. </font></li> <li><font size="3">Step 3: On the first remote, press and hold both the LOCK and UNLOCK buttons simultaneously. – After about 15 seconds, the door locks will cycle again to confirm successful programming. – Release the buttons. </font></li> <li><font size="3">Step 4: If you have additional remotes to program, repeat Step 3 for each one within one minute. </font></li> <li><font size="3">Step 5: Remove the jumper wire from the DLC to exit programming mode. </font></li> <li><font size="3">Step 6: Test all remotes to ensure proper operation.</font></li> </ul>
