Cadillac 2005 DeVille - Manual (Page 10)

When you press a button, the feature will turn on at the
highest setting. Each time you press the button, the
feature will go down one temperature setting.
To turn the feature off, keep pressing the button until
the display lights turn off.
Reclining Seatbacks
The recliner controls are
located on the outboard
sides of the front seats.
Press the recliner control forward or rearward to adjust
the seatback forward or rearward.
But do not have a seatback reclined if your vehicle
is moving.
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