From pg 64 in the 2010 SHO OM:
Setting auto high beam sensitivity
The automatic high beam system has two sensitivity settings. The default
setting is near. If you would like the high beams to turn off when traffic
is further away, the sensitivity setting can be changed to far. The
procedure is as follows:
Preconditions:
• Vehicle is at a stop.
• Ignition is in the on position.
• The headlamp control is in the position.
• High-beams are off.
Programming Sequence:
1. Turn the headlamp control from (On) to (autolamp) three times within two seconds, ending in (On).
2. Cycle flash-to-pass three times using the multi-function lever.
3. The sensitivity setting has been changed.
Note: The programming sequence will end if either of the following occur:
• The vehicle speed is not zero.
• The battery voltage is out of normal range.