GMC 2001 Denali Owner's Manual page 17

Heated Front Seats
The ignition must be in RUN for this feature to operate.
To activate the heated seats, press the button once for the
HI heat setting. Press the button again for the LO heat
setting. To turn off the heated seats, press the button a third
time. An indicator light on the button will illuminate for
each heat setting anytime the heated seats are operating.
The heated front seats will be canceled after the ignition
is turned to OFF. If you still want to use the heated front
seat feature after you restart your vehicle, you will need
to press the heated seat button again.
You vehicle also has rear heated seats. See the section
on "Rear Heated Seats" later in this section for
more information.
1-4
The control for the driver's
side heated seat is located
on the driver's side door
panel. The control for the
passenger's side heated seat
is located on the passenger's
side door panel.
Reclining Front Seatbacks
Your vehicles front seatbacks have a recline feature.
Vertical Control: You can use the vertical control to
adjust the angle of the seatback. Move the reclining front
seatback rearward or forward by moving the control
toward the rear or toward the front of the vehicle.