2010 GMC Sierra 1500 Crew Cab Owner's Manual - Page 287

To match an RKE transmitter to your vehicle: 1. Press the trip odometer reset stem until RELEARN REMOTE KEY displays. 2. Press and hold the trip odometer reset stem for three seconds. The message REMOTE KEY LEARNING ACTIVE will display. 3. Press and hold the lock and unlock buttons on the first transmitter at the same time for about 15 seconds. On vehicles with memory recall seats, the first transmitter learned will match driver 1 and the second will match driver 2. A chime will sound indicating that the transmitter is matched. 4. To match additional transmitters at this time, repeat Step 3. Each vehicle can have a maximum of eight transmitters matched to it. 5. To exit the programming mode, you must cycle the key to LOCK/OFF. DIC Compass Your vehicle may have a compass in the Driver Information Center (DIC). Compass Zone The zone is set to zone eight upon leaving the factory. Your dealer will set the correct zone for your location. Under certain circumstances, such as during a long distance cross-country trip or moving to a new state or province, it will be necessary to compensate for compass variance by resetting the zone through the DIC if the zone is not set correctly. Compass variance is the difference between the earth's magnetic north and true geographic north. If the compass is not set to the zone where you live, the compass may give false readings. The compass must be set to the variance zone in which the vehicle is traveling. 4-63