1998 Chevrolet Venture Owner's Manual - Page 35
1998 Chevrolet Venture Manual
Page 35 highlights
6. Remove the seat by rocking it slightly towards the rear of the vehicle and then pulling it out. Replacing the Split Bench Sections Don't put the sections of the bench seat in so they face rearward because they won't latch that way. If you want more storage room behind the seat, adjust each section by sliding it forward. The split benches have seat position labels, located on the backof each seat, showing where the seat must go. Follow that diagram. The left (40) section of the 40/60 split bench uses the A and B sets of floor cups. Repeat Steps 1 through 5 for the other section of the split bench seat. The right (60) section of the 40/60 split bench uses the C and D sets of floor cups. The left section of the 50/50 split benchuses the G and H sets of floor cups. The right section of the 50/50 split bench uses the 1 and J sets of floor cups. See "Seat Controls'' in the beginningof this section for more details. The seat must be placed in the proper location for the legs to attach correctly. Make sure the seat is in full the rear position before beginning this procedure. 1-22