Chevrolet 2010 Colorado Owner's Manual page 348

1. Assemble the wheel wrench (D), the jack handle
extensions (A) and the jack handle (C) as shown.
6-82
2. Insert the chiseled end of the jack handle (C) at a
slight angle through the hole in the rear bumper
and into the funnel-shaped guide.
3. Turn the wheel wrench (D) 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.
If the spare tire does not lower to the ground, the
secondary latch is engaged causing the tire
not to lower. See Secondary Latch System on
page 6-91.