Chevrolet Venture 2003 Owner's Manual page 170

The tray sill can be folded down onto the stowable seat
to close the space between the two while the stowable
seat is folded down. To do this, flip the sill plate up and
over toward the stowable seat.
The cover of the convenience center can be left in its
upright position while the vehicle is moving.
The convenience center has six hooks on the inside
cover for hanging items on. The prop rods can hold up
to 49 lbs. (21.8 kg) on the cover of the convenience
center while in its upright position.
2-60
The convenience center and the stowable seat both
have a maximum weight capacity of 400 lbs. (181.6 kg).
Notice: Loading objects that weigh over 400 lbs
(181 kg) onto the sliding rear convenience tray may
cause damage. Repairs would not be covered by
your warranty. Do not load heavy objects on
the sliding rear convenience tray.