GMC 1999 Jimmy Owner's Manual page 127

Cargo Cover (If Equipped)
If you have the optional cargo cover, you can use it to
cover items in the cargo area of your vehicle.
Grasp the handle and unroll the cover. Latch the posts
into the sockets on the inside trim panel on the
passenger's side of the vehicle to secure it.
CAUTION:
An improperly stored cargo cover could be
thrown about the vehicle during a collision or
sudden maneuver. You or others could be
injured. If you remove the cover, always store it
outside of the vehicle. When you put it back,
always be sure that it is securely reattached.
Cargo Tie Downs
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There are four cargo tie
downs in the rear that allow
you to strap cargo in and
keep it from moving inside
the vehicle.
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