GMC Yukon Owner's Manual page 538

To store the tools, do the following:
A. Wheel Blocks
B. Tool Bag with
Jack Tools
C. Retaining Bracket
D. Wing Nut Retaining
Tool Bag
1. Return the tools (wheel wrench, jack handle, and
jack handle extensions) to the tool bag (B).
2. Assemble wheel blocks (A) and jack (E) together
with the wing nut (F).
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E. Jack
F. Wing Nut Retaining
Wheel Blocks
G. Jack Knob
3. Position the jack (E) and wheel blocks (A) in the
driver's side trim panel over the wheelhouse.
4. Turn the jack knob (G) clockwise until the jack is
secured tight in the mounting bracket. Be sure to
position the holes in the base of the jack onto the
pin in the mounting bracket.
5. Use the retaining bracket (C) to fasten the tool
bag (B) on the stud and turn the wing nut (D)
clockwise to secure.
6. Return the storage tray to its original stored
position.