2009 GMC SIERRA clock reset

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Page 275 of 596

GMC SIERRA 2009  Owners Manual H(Clock) (AM-FM Radio):The radio may have a
clock button for setting the time. With this type of radio,
the clock can be set with either the radio turned on
or off. SeeSetting the Clock on page 3-86fo

Page 333 of 596

GMC SIERRA 2009  Owners Manual If the system fails to turn on or activate, the StabiliTrak
light along with one of the following messages will be
displayed on the Driver Information Center (DIC):
TRACTION CONTROL OFF, SERVICE TRACT