Chevrolet 2007 Colorado Owner's Manual page 402

Regular/Extended Cab
To access the tools:
Extended/Regular Cab
402
For regular and
extended cab vehicles,
the jack and wheel
blocks are located
under the cover at the
center of the vehicle
behind the front seats.
1. Move the seats
forward to access
the cover.
2. Turn the wing nut on the cover
counterclockwise to remove it.
For crew cab models, reach under the rear
seat to access the jack and wheel blocks.
To reinstall the jack and wheel block assembly
in the mounting bracket, insert the tabs into
the jack base by pushing the blocks up into
the assembly. The outer hole in the jack base
aligns with the tab on the bracket. When
reinstalling, make sure the jack is secure, but
do not overtighten the jack in the bracket.
3. Remove the wheel blocks and the wheel
block retainer by turning the wing nut
counterclockwise.
4. Put the wheel blocks at the front and rear
of the tire farthest away from the one being
changed. That would be the tire on the
other side, at the opposite end of the vehicle.
5. Locate the wing nut used to retain the storage
bag and tools which is under the front
passenger's seat. Remove it by turning the
wing nut counterclockwise.
You will use the jack handle extensions and the
wheel wrench to remove the underbody-mounted
spare tire.