page 4-28 of the manual i believe. you can access the configuration menu and in there under "vehicle settings" you will have an option to set it to:
- lights
- horn
- lights and horn
very simple..............
__________________
IOM 2SSRS LS3 R6P - VIN 7553 Delivered 5/22/2009 Kooks, Corsa and Roto-Fab - SOLD 9/2010
VR 2SSRS LS3 - Borla, SLP CAI