GMC Hummer H3 2008 Owner's Handbook Manual page 109

Instrumentation and Controls
In light rain or snow, you can use
the delay feature. Turn the band to
one of the delay settings to choose
the desired delay time between
sweeps. The closer the setting is to
the top of the lever, the shorter the
delay.
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To turn off the wipers, rotate the
band to the "off" setting
The ignition has to be on for this
feature to work.
NOTICE
Clear any ice or snow from the
wiper blades before using them
to prevent damage to the
blades and overloading the
wiper motor.
The wipers are protected by a
circuit breaker and a fuse. If there
is an electrical overload, the wiper
system will stop until the motor
cools.
Wiper blades will eventually wear
out and not wipe properly, reduc-
ing forward vision. Replace worn
wiper blades.
.