Horn
Press 
on the steering wheel pad
to sound the horn.
See also:
Windshield Washer
(Windshield Washer): To
spray washer fluid
on the windshield, press the windshield washer
paddle. The wipers will clear the window and then
either stop or return to your preset speed.
CAUTION:
...
Technology and notable features
Buick's first truck in its lineup since 1923, the Rendezvous was billed as a
combination of the best attributes of a minivan (large cargo capacity, seating
for up to seven), a luxury automobile (r ...
Cargo Net
There is a cargo net for storing items on the side of the trunk. ...