GMC Envoy Owner's Manual page 10

Heated Seats
To heat the entire seat, press the horizontal button with
the heated seat symbol. Press the button repeatedly
to cycle through the temperature settings of high,
medium, low and off. The indicator lights will glow to
designate the level of heat selected: three for high, two
for medium and one for low. The low setting warms
the seatback and cushion until the seat temperature is
near body temperature. The medium and high
settings heat the seatback and seat cushion to a slightly
higher temperature. You will be able to feel heat in
about two minutes.
Your vehicle may have
heated front seats. The
buttons used to control this
feature are located on
the front door armrests.
The engine must be
running for the heated seat
feature to work.
To heat only the seatback, press the button with the
words BACK ONLY. An indicator light on the switch will
glow to designate that only the seatback is being
heated. Additional presses will cycle through the heat
levels for the seatback only. Press the horizontal button
again to heat the whole seat.
The feature will shut off automatically when the ignition
is turned off.
Reclining Seatbacks
If your vehicle has a manual recliner, lift the lever
located on the outboard side of the seat and push the
seatback rearward to recline the seatback. To return the
seatback to the normal position, lift the lever without
pushing rearward on the seatback and the seatback will
move forward.
If your vehicle has power seat controls, the vertical
power seat control described earlier allows the seatback
to recline.
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