See also:

Initialization
Items to initialize The following items must be initialized for normal system operation in cases such as after the battery is reconnected, or maintenance is performed on the vehicle. ...

Erasing the entire HomeLink® memory (all three programs)
Press and hold the 2 outside but- tons for 10 seconds until the indi- cator light flashes. If you sell your vehicle, be sure to erase the programs stored in the HomeLink® memory.  - Befo ...

DAC (Downhill Assist Control system)
The DAC helps to prevent excessive speed on steep downhill slopes. The system will operate when the vehicle is traveling under 15 mph (25 km/h) and the four-wheel drive control switch is in the L4 ...