Hummer 2004 H2 - Manual (Page 398)

Rear Flat Tire: Attach the jack handle extension (D)
to the jack handle (E) and then press the clip (arrow)
so it engages. Then attach the jack handle (E) with
the hook end connected to the u-hook/clevis on the
jack (A). Slide the ratchet (F) onto the jack handle
extension (D) with the UP mark facing you.
5. Turn the ratchet (F) clockwise to raise the jack
head to the lifting point.
Front Flat Tire: Position
the jack under the vehicle
on the frame behind
the flat tire where the
frame sections overlap.
See the graphic following
for an approximate
measurement of the jack
location on the frame.
Front Position
5-84