Chevrolet 2006 TrailBlazer EXT Owner's Manual page 12

1-6
If your vehicle has power
seats, the power reclining
seatback control is
located on the outboard
side of the front seat
cushions. Press the control
rearward to recline the
seatback. Press the control
forward to raise the
seatback.
But do not have a seatback reclined if your vehicle is
moving.