GMC TopKick 2007 Owner's Manual page 18

Lever Located On
Inboard Side
To recline the seatback, do the following:
1. Lift the recline lever.
2. Move the seatback to the desired position,
the release the lever to lock the seatback in
place.
3. Push and pull on the seatback to make sure it
is locked.
18
To return the seatback to an upright position, do
the following:
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.