1998 GMC Suburban Owner's Manual - Page 18

Seatback Latches (2-Door Utility) r If the seatbackisn't locked, it could move forward in a sudden stop or crash. That could cause injury to the person sitting there. Always press rearward on the seatback to be sure it is locked. The front seatback folds forward to let you access the rear of the vehicle. To return the seatback to the upright position, just push the seatback rearward until it latches. After returning the seatback to its upright position, pull the seatback forward to make sure it is locked. 1-6