GMC 2002 Savana Van Owner's Manual page 13

2. Locate the blue or yellow handle on the inboard side
of the seat. If the vehicle has floor mats, the pins will
be located under a flap that has been cut into the mat.
1-6
3. Turn the handle up.
4. Once the blue or yellow handle is turned up, pull the
handle to remove the locking pin. If the vehicle has
floor mats, the pins will be located under a flap that
has been cut into the mat.