Jeep 2009 Grand Cherokee - Owner Manual - Manual (Page 394)

Jack Location
The scissor-type jack and tire changing tools are located
in the passenger side compartment, behind the second
row seat.
Spare Tire Stowage
The spare tire is stowed under the rear of the vehicle by
means of a cable winch mechanism. To remove or stow
the spare, use the jack handle to rotate the “spare tire
drive” nut. The nut is located under a plastic cover at the
center-rear of the cargo floor area, just inside the liftgate
opening.
CAUTION!
Do not use power tools to winch the tire up or down.
Impact type tools can damage the winch mechanism.
Jack Storage Location
392 WHAT TO DO IN EMERGENCIES