Chevrolet 2001 Express Van Owner's Manual page 266

Storing a Flat or Spare Tire and Tools
CAUTION:
Storing a jack, a tire or other equipment in the
passenger compartment of the vehicle could
cause injury. In a sudden stop or collision, loose
equipment could strike someone. Store all these
in the proper place.
1. Put the tire on the ground at the rear of the vehicle
with the valve stem pointed down.
5-32
2. Pull the retaining bar through the center of the
wheel, making sure it is properly attached.