Chevrolet Avalanche 2004 Owner's Manual page 458

A. Wheel Blocks
B. Knob
C. Wing Nut
D. Retaining Hook
5-92
E. Jack
F. Jack Head
G. Mounting Bracket
2. Release the jack (E) from the mounting bracket (G)
by turning the knob (B) on the jack counterclockwise
to lower the jack head (F) from the mounting
bracket.
3. Remove the wheel blocks (A) attached to
the jack (E) by turning the wing nut (C)
counterclockwise. Place the wheel blocks where
needed as indicated in the previous Caution.
The tools for changing a flat tire are located in the
passenger's side Top-Box storage unit.