1996 GMC Suburban Owner's Manual - Page 10

If your vehicle has a manual bucket, split bench or full bench seat, you can adjust it with this lever at the front of the seat. Power Driver's Seat (Option) Slide the lever at the front of the seat toward the passenger's side to unlock it. Using your body, slide the seat to where you want it. Then, release the lever and try to move the seat with your body, to make sure the seat is locked in place. If your vehicle has a power seat on the driver's side, you can adjust it with these controls at the outside edge of the seat. 1-2