Chevrolet 2007 Silverado 1500 Pickup Owner's Manual page 584

3. Attach the wheel wrench (H) and
extensions (I) as shown.
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5. Raise the tire part way upward. Make sure the
retainer (D) is seated in the wheel opening.
6. Raise the tire fully against the underside of
the vehicle by turning the wheel wrench
clockwise until you hear two clicks or feel it
skip twice. You cannot overtighten the cable.
4. Insert the hoist
end (F) through the
hole (G) in the rear
bumper. Be sure
the hoist end of the
extension (F)
connects to the hoist
shaft (E). The ribbed
square end of the
extension is used to
lower the spare tire.