GMC SIERRA 2020 Owner's Manual page 409

408 Vehicle Care
the spare tire lock, insert the
ignition key, turn, and pull
straight out.
2. Assemble the wheel wrench (7)
and the two jack handle
extensions (6), as shown.
Spare Tire Cable (If Equipped)
3. If the vehicle is equipped with a
spare tire cable disconnect the
cable from the attachment on
the frame by unclipping it from
the frame attachment bracket.
4. Insert the hoist end (open
end) (10) of the extension
through the hole (9) in the rear
bumper.
Do not use the chiseled end of
the wheel wrench.
Be sure the hoist end of the
extension (10) connects to the
hoist shaft. The ribbed square
end of the extension is used to
lower the spare tire.
5. Turn the wheel wrench
counterclockwise to lower the
spare tire to the ground.
Continue to turn the wheel
wrench until the spare tire can
be pulled out from under the
vehicle.
6. Pull the spare tire out from
under the vehicle.