2009 GMC ENVOY DENALI lock

8. 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.
9. 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.
10. Disconnect the jack handle from the jack and
carefully remove the jack. Use one hand to push
against the spare while rmly pulling the jack out
from under the spare tire with the other hand.
11. If the spare tire is
hanging from the
cable, insert the socket
end of the extension
into the hoist shaft hole
on a 45 degree
angle downward.
12. Be sure that the socket end of the extension
connects to the hoist shaft.Turn the wheel wrench counterclockwise to lower
the spare the rest of the way.
13. Tilt the retainer at the end of the cable and pull it
through the wheel opening. Pull the tire out from
under the vehicle.
Notice:If you drive away before the spare tire or
secondary latch system cable has been reinstalled,
you could damage your vehicle. Always reinstall
this cable before driving your vehicle.
14. 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 tire using the
hoist assembly until it has been repaired or replaced.
5-99

Follow this diagram to store the underbody-mounted at
or spare tire.
A. Wheel Wrench
B. Hoist Shaft
C. Extension
D. Retainer
E. Spare or Flat Tire
(Valve Stem
Pointed Up)
1. Put the tire (E) on the ground at the rear of the
vehicle.
2. Remove the hubcap, if the vehicle has one, from the
at tire by tapping the backside of the hubcap with
the wheel wrench (A). Store in a safe location until
the at tire is repaired. Once the tire is repaired,
replace the hubcap.
3. Make sure the valve stem is pointed up and to
the rear.
4. Pull the retainer (D) through the wheel.
5. Put the socket end of the extension (C) through the
hole just above the rear bumper at a 45 degree
angle downward. Connect the socket end of
the extension to the hoist shaft (B).6. Raise the tire fully against the underside of the
vehicle. Continue turning the wheel wrench (A)
clockwise until you hear two clicks or feel it skip
twice. This indicates that the tire is secure and the
cable is tight. The spare tire hoist cannot be
overtightened.
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 and socket end of the
extension to tighten the cable.
8. Return the equipment to the proper location in the
vehicle as shown next.
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A. Handle
B. Wheel Wrench
C. Instruction Label
D. Extension(s)E. Knob
F. Wheel Blocks
and Jack
1. Attach the handle (A), wheel wrench (B), and
extension (D) in the slots provided.
2. Roll up the instruction label (C) and return to the
slot in the tool kit.
3. Assemble the wheel blocks (F) to the jack.
4. Turn the knob (E) on the jack clockwise to raise the
jack head.
5. Return the rear seat to its proper position.
Spare Tire
This vehicle may have a spare tire. Although the spare
tire was fully inated when the vehicle was new, it can
lose air after a time. Check the ination pressure
regularly. SeeInflation - Tire Pressure on page 5-60
andLoading the Vehicle on page 4-31for information
regarding proper tire ination and loading your vehicle.
For instruction on how to remove, install or store a spare
tire, seeRemoving the Flat Tire and Installing the Spare
Tire on page 5-92andStoring a Flat or Spare Tire and
Tools on page 5-100.
After installing the spare tire on your vehicle, you should
stop as soon as possible and make sure the spare is
correctly inated. The spare tire is made to perform well
at speeds up to 70 mph (112 km/h) at the recommended
ination pressure, so you can nish your trip.
Have the damaged or at road tire repaired or replaced
as soon as you can and installed back onto your vehicle.
This way, a spare tire will be available in case you need it
again. Do not mix tires and wheels of different sizes,
because they will not t. Keep your spare tire and its
wheel together.
5-102

Electrical System
Add-On Electrical Equipment
Notice:Do not add anything electrical to the
vehicle unless you check with your dealer/retailer
rst. Some electrical equipment can damage
the vehicle and the damage would not be covered
by the vehicle’s warranty. Some add-on electrical
equipment can keep other components from
working as they should.
Add-on equipment can drain the vehicle battery, even if
the vehicle is not operating.
The vehicle has an airbag system. Before attempting to
add anything electrical to the vehicle, seeServicing
Your Airbag-Equipped Vehicle on page 1-68.
Headlamps
The headlamp wiring is protected by four fuses. An
electrical overload will cause a lamp to go on and off.
If this happens, have the headlamp wiring checked
right away.
Windshield Wiper Fuses
The windshield wiper motor is protected by a circuit
breaker and a fuse. If the motor overheats due to heavy
snow, etc., the wiper will stop until the motor cools. If the
overload is caused by some electrical problem, have it
xed.
Power Windows and Other Power
Options
Circuit breakers in the fuse block protect the power
windows and other power accessories. When the current
load is too heavy, the circuit breaker opens and closes,
protecting the circuit until the problem is xed or
goes away.
5-112

Fuses and Circuit Breakers
The wiring circuits in the vehicle are protected from
short circuits by a combination of fuses and circuit
breakers. 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 the 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.
Engine Compartment Fuse Block
The fuse block is located under the hood in the engine
compartment on the driver side of the vehicle. See
Engine Compartment Overview on page 5-12for more
information on location.
Remove the primary cover by pressing the two locking
tabs. Remove the secondary cover by snapping off while
lifting. To reinstall the fuse panel cover, reverse the
sequence.
Notice:Spilling liquid on any electrical components
on the vehicle may damage it. Always keep the
covers on any electrical component.
5-113

Fuses Usage
5 Driver Side High-Beam Headlamp
6 Driver Side Low-Beam Headlamp
7 Windshield Wiper
8 Active Transfer Case
9 Windshield Washer
10 Powertrain Control Module B
11 Fog Lamps
12 Stoplamp
13 Cigarette Lighter
14 Ignition Coils
15Transmission Control Module
Canister
16 Truck Body Controller, Ignition 1
17 Crank
18 Airbag
19 Trailer Electric Brake
21 Horn
22 Ignition E
23 Electronic Throttle Control
24Instrument Panel Cluster, Driver
Information CenterFuses Usage
25Brake Transmission Shift
Interlock
26 Engine 1
27 Backup
28 Engine Control Module 1
29 Engine Control Module
30 Air Conditioning
31 Injector A
32 Trailer
33 Antilock Brakes (ABS)
34 Ignition A
35 Blower
36 Ignition B
50 Passenger Side Trailer Turn
51 Driver Side Trailer Turn
52 Hazard Flashers
53 Transmission
54 Oxygen Sensor B
55 Oxygen Sensor A
56 Injector B
57 Headlamp Driver Module
5-115

Fuses Usage
58 Body Controller 1
59 Electric Adjustable Pedals
61Vehicle Stability Enhancement
System
62 Regulated Voltage Control
63 Air Solenoid
64 Air Pump
Relays Usage
37 Headlamp Wiper
38 Rear Window Wiper/Washer
39 Fog Lamps
40 Horn
41 Fuel Pump
42 Windshield Washer
43 High-Beam Headlamp
44 Air Conditioning
46 Headlamp Driver Module
47 Starter
Relays Usage
49 Electric Adjustable Pedal
60 Powertrain
69 Air Solenoid
Miscellaneous Usage
48 Instrument Panel Battery
Rear Underseat Fuse Block
5-116

Fuses Usage
07 Truck Body Controller 2
08 Power Seats
09 Rear Wiper
10 Driver Door Module
11 Amplier
12 Passenger Door Module
13 Rear Climate Controls
14 Driver Side Rear Parking Lamps
15 Blank
16Vehicle Center High-Mounted
Stoplamp (CHMSL)
17Passenger Side Rear Parking
Lamps
18 Locks
19Liftgate Module/Driver Seat
Module
20 BlankFuses Usage
21 Lock
23 Blank
24 Unlock
25 Blank
26 Blank
27OnStar
®Overhead
Battery/OnStar®System
28 Sunroof
29 Not Used
30 Parking Lamps
31 Truck Body Controller Accessory
32 Truck Body Controller 5
33 Front Wipers
34 Vehicle Stop
35 Transmission Control Module
36Heat Ventilation Air
Conditioning B
5-118