Hummer H2 2004 Owner's Manual page 382

The spare tire and wheel blocks are stored in the rear
cargo area. Remove the tire cover to get to them.
A. Spare or Flat Tire
B. Receiver Extension (If Equipped) Not used for tire
changing procedure. See "Receiver Extension" under
If You Are Stuck: In Sand, Mud, Ice or Snow on
page 4-53.
C. Tire Retainer Plate
D. Nut
E. Wheel Blocks
5-78
Follow the instructions to remove the wheel blocks and
spare tire:
1. Remove the wheel blocks from the tire retainer
plate by turning the wingnut counterclockwise.
2. Place the flat end of the wheel wrench through the
hole in the spanner wrench.