2007 GMC SIERRA CLASSIC lock

Secondary Latch System
Your vehicle has an underbody-mounted tire hoist
assembly that has a secondary latch system. It
is designed to stop the spare tire from suddenly
falling off your vehicle. For the secondary latch to
work, the spare must be installed with the valve
stem pointing down. SeeStoring a Flat or
Spare Tire and Tools on page 584.
{CAUTION:
Before beginning this procedure read all
the instructions. Failure to read and follow
the instructions could damage the hoist
assembly and you and others could get
hurt. Read and follow the instructions
listed next.To release the spare tire from the secondary latch,
do the following:
1. Check under the vehicle to see if the cable
end is visible.
If the cable is not visible, proceed to Step 6.
2. If it is visible, rst try to tighten the cable by
turning the wheel wrench clockwise until you
hear two clicks or feel it skip twice. You
cannot overtighten the cable.
3. Loosen the cable by turning the wheel wrench
counterclockwise three or four turns.
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4. Repeat this procedure at least two times. If
the spare tire lowers to the ground, continue
with Step 5 ofRemoving the Spare Tire
and Tools on page 566.
5. Turn the wrench counterclockwise until
approximately 6 inches (15 cm) of cable
is exposed.
6. Stand the wheel blocks on their shortest ends,
with the backs facing each other.
7. Place the bottom
edge of the jack (A)
on the wheel
blocks (B),
separating them so
that the jack is
balanced securely.8. Attach the jack handle, extension, and wheel
wrench to the jack and place it (with the
wheel blocks) under the vehicle towards the
front of the rear bumper.
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9. Position the center lift point of the jack under
the center of the spare tire.
10. Turn the wheel wrench clockwise to raise the
jack until it lifts the end tting.11. Continue raising the jack until the spare tire
stops moving upward and is held rmly in
place. The secondary latch has released and
the spare tire is balancing on the jack.
12. Lower the jack by turning the wheel wrench
counterclockwise. Keep lowering the jack
until the spare tire slides off the jack or
is hanging by the cable.
{CAUTION:
Someone standing too close during the
procedure could be injured by the jack. If
the spare tire does not slide off the jack
completely, make sure no one is behind
you or on either side of you as you pull
the jack out from under the spare.
13. Disconnect the jack handle from the jack.
Carefully remove the jack from underneath
the vehicle.
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14. Use one hand to push against the spare while
rmly pulling the jack out from under the
spare tire with the other hand.
If the spare tire is hanging from the cable, insert
the hoist handle, extension, and wheel wrench
into the hoist shaft hole in the bumper and turn
the wheel wrench counterclockwise to lower the
spare the rest of the way.
15. Tilt the retainer at
the end of the cable
and pull it through
the wheel opening.
Pull the tire out
from under
the vehicle.16. Turn the wheel wrench clockwise to raise the
cable back up if the cable is hanging under
the vehicle.
Have the hoist assembly inspected as soon as
you can. You will not be able to store a spare or
at tire using the hoist assembly until it has
been replaced.
To continue changing the at tire, seeRemoving
the Flat Tire and Installing the Spare Tire on
page 571.
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G. Hoist Shaft Access
Hole
H. Wheel WrenchI. Jack Handle
Extensions
J. Spare Tire Lock
(If Equipped)
1. Put the tire on the ground at the rear of the
vehicle with the valve stem pointed down,
and to the rear.
2. Tilt the retainer (D)
downward and
through the wheel
opening. Make
sure the retainer
is fully seated across
the underside of
the wheel.3. Attach the wheel wrench (H) and
extensions (I) as shown.
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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.
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.7. Make sure the tire is stored securely. Push,
pull (A), and then try to turn (B) the tire. If the
tire moves, use the wheel wrench to tighten
the cable.
8. Reinstall the spare tire lock (if equipped).
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To store the jack and jack tools, do the following:
A. Wing Nut
B. Wheel Blocks
C. Retaining
Bracket and
Wing NutD. Wheel Wrench
and Extensions
E. Tool Bag
F. Mounting Bracket
G. Jack
H. Retaining Hook1. Put the tools (D) in the tool bag (E) and place
them in the retaining bracket (C).
2. Tighten down the wing nut (C).
3. Assemble the wheel blocks (B) and jack (G)
together with the wing nut (A) and
retaining hook (H).
4. Position the jack (G) in the mounting
bracket (F). Position the holes in the base of
the jack (G) onto the pin in the mounting
bracket (F).
5. Return them to their original location in the
vehicle. For more information, refer to
Removing the Spare Tire and Tools on
page 566for more information.
587

Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected
from short circuits by a combination of fuses, circuit
breakers and fusible thermal links. This greatly
reduces the chance of res caused by electrical
problems.
Look at the silver-colored band inside the fuse. If
the band is broken or melted, replace the fuse.
Be sure you replace a bad fuse with a new one of
the identical size and rating.
If you ever have a problem on the road and
don’t have a spare fuse, you can borrow one
that has the same amperage. Just pick some
feature of your vehicle that you can get along
without – like the radio or cigarette lighter – and
use its fuse, if it is the correct amperage. Replace
it as soon as you can.
Instrument Panel Fuse Block
The fuse block access
door is on the driver’s
side edge of the
instrument panel.
Pull off the cover to
access the fuse block.
To remove fuses, hold the end of the fuse
between your thumb and index nger and pull
straight out.
You may have spare fuses located behind the
fuse block access door. These can be used
to replace a bad fuse. However, make sure it
is of the correct amperage.
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