GMC Terrain 2017 Owner's Manual page 12

Lumbar Adjustment
Eight-Way Power Seat Shown,
Four-Way Similar
If available, press and hold the front
or rear of the switch to increase or
decrease lumbar support. Release
the switch when the seatback
reaches the desired level of lumbar
support.
See Lumbar Adjustment 0 45.
Reclining Seatbacks
Manual Reclining Seatbacks
To recline a manual seatback:
1. Lift the lever.
2. Move the seatback to the
desired position, and then
release the lever to lock the
seatback in place.
3. Push and pull on the seatback
to make sure it is locked.
In Brief
To return the seatback to the upright
position:
1. Lift the lever fully without
applying pressure to the
seatback, and the seatback will
return to the upright position.
2. Push and pull on the seatback
to make sure it is locked.
Power Reclining Seatbacks
To adjust a power seatback,
if available:
Tilt the top of the control
rearward to recline.
Tilt the top of the control forward
to raise.
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