1996 GMC Sonoma Owner's Manual - Page 209

Removing the Spare Tireand Tools The jacking equipment you'll need is stored inside the plastic jack cover which is behind the front seats, either on the center of the wall (extended cab) oron the passenger's side of the wall (regular cab). Turn the wing nut counterclockwise and remove the wheel blocks, jack and wheel wrench. Your spare tire is stored underneath the rear of your vehicle. See "Compact Spare Tire" later in this section for more information about the compact spare. NOTICE: Never removeor restow a tirefrodto a stowage is position under the vehicle while the vehicle supported by a jack. Always tighten the tire fully against the underside of the vehicle when restowing. This is the jack cover for the extended cab. The cover for the regular cab is similar. To remove it, turn the plastic wing nut counterclockwise. Remove the