GMC Sonoma 2001 Owner's Manual page 124

Outside Manual Adjust Mirror
Adjust your outside mirrors so you can see a little of the
side of your vehicle.
You can fold them in before entering a car wash.
Pull the mirrors in toward the vehicle. Push the mirrors
back out when finished.
Power Remote Control Mirror
(If Equipped)
Move the upper control to the left or right to choose the
mirror, then press the arrows located on the control pad
to adjust the mirror.
2-52
These controls are located
on the driver's door armrest.
Convex Outside Mirror
A convex mirror's surface is curved so you can see more
from the driver's seat.
CAUTION:
A convex mirror can make things (like other
vehicles) look farther away than they really are.
If you cut too sharply into the right or left lane,
you could hit a vehicle. Check your inside
mirror or glance over your shoulder before
changing lanes.