1996 GMC Sonoma Owner's Manual - Page 10

For vehicles without easy entry seats, move the lever under the front of the seat toward the driver's door to unlock it. Slide the seat to where you want it. For vehicles with easy entry seats, move the lever under the front of the seat up to unlock it. 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 into place. Then release the lever and try to move the seat with your body to make sure the seat is locked into place. 1-2