GMC 2007 Acadia Owner's Manual page 16

Power Reclining Seatbacks
In vehicles with seats that have power reclining
seatbacks, the control used to recline them
is located on the outboard side of the seat behind
the power seat control. See Power Seats on
page 10 for more information.
•
To recline the seatback, tilt the top of the
control rearward.
•
To bring the seatback forward, tilt the top of
the control forward.
16
CAUTION:
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Sitting in a reclined position when your
vehicle is in motion can be dangerous.
Even if you buckle up, your safety belts
cannot do their job when you are reclined
like this.
The shoulder belt cannot do its job
because it will not be against your body.
Instead, it will be in front of you. In a
crash, you could go into it, receiving neck
or other injuries.
The lap belt cannot do its job either. In a
crash, the belt could go up over your
abdomen. The belt forces would be there,
not at your pelvic bones. This could cause
serious internal injuries.
For proper protection when the vehicle is
in motion, have the seatback upright.
Then sit well back in the seat and wear
your safety belt properly.