GMC 2010 GMC Sierra, Owner'S Manual, Page: 201 / 660

Park Tilt Mirrors
If the vehicle has the memory package, the passenger
and/or driver mirror tilts to a preselected position when
the vehicle is in R (Reverse). This feature lets the driver
view the curb when parallel parking. The mirror(s)
return to the original position when the vehicle is shifted
out of R (Reverse), or the ignition is turned off or to
OFF/LOCK.
Turn this feature on or off through the Driver Information
Center (DIC). See
DIC Vehicle Customization (With DIC
Buttons) on page 4 ‑ 76 for more information.
Outside Convex Mirror
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WARNING:
A convex mirror can make things, like other
vehicles, look farther away than they really are.
If you cut too sharply into the right lane, you could
hit a vehicle on the right. Check the inside mirror
or glance over your shoulder before changing
lanes.
The passenger side mirror is convex shaped. A convex
mirror's surface is curved so more can be seen from the
driver seat.
Outside Heated Mirrors
For vehicles with heated mirrors:
<
(Rear Window Defogger): Press to heat the
mirrors. If the vehicle has a towing mirror, only the
upper glass of the mirror is heated. The lower convex
part of the towing mirror is not heated.
Depending on the vehicle's features, see “ Rear Window
Defogger ” under, Climate Control System (With Heater
Only) on page 4 ‑ 19 or Climate Control System (With
Air Conditioning) on page 4 ‑ 20 or Dual Automatic
Climate Control System on page 4 ‑ 23 for more
information.
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