2017 GMC SIERRA DENALI Owners Manual

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
392 Vehicle Care To replace one of these bulbs:
1. Remove the two screws and lift
off the lamp assembly.
2. Turn the bulb socket
counterclockwise and pull it
straight out.
3. Pull the bulb straight out from
the socket.
Replacement Bulbs For replacement bulbs, contact your
dealer. Electrical System High Voltage Devices and
Wiring For an eAssist vehicle, see the
Silverado/Sierra eAssist
supplement.
Electrical System
Overload The vehicle has fuses to protect
against an electrical system
overload. Fuses also protect power
devices in the vehicle.
Replace a bad fuse with a new one
of the identical size and rating.
If there is a problem on the road and
a fuse needs to be replaced, there
are some spare fuses and a fuse
puller in the left instrument panel
fuse block. The same amperage
fuse can also be borrowed. Choose
some feature of the vehicle that is
not needed to use and replace it as
soon as possible. Headlamp Wiring An electrical overload may cause
the lamps to go on and off, or in
some cases to remain off. Have the
headlamp wiring checked right away
if the lamps go on and off or
remain off.
Windshield Wipers If the wiper motor overheats due to
heavy snow or ice, the windshield
wipers will stop until the motor cools
and will then restart.
Although the circuit is protected
from electrical overload, overload
due to heavy snow or ice may
cause wiper linkage damage.
Always clear ice and heavy snow
from the windshield before using the
windshield wipers.
If the overload is caused by an
electrical problem and not snow or
ice, be sure to get it fixed.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
Vehicle Care 393
Fuses The wiring circuits in the vehicle are
protected from short circuits by
fuses. This greatly reduces the
chance of fires caused by electrical
problems.
{ DangerFuses and circuit breakers are
marked with their ampere rating.
Do not exceed the
specified amperage rating when
replacing fuses and circuit
breakers. Use of an oversized
fuse or circuit breaker can result
in a vehicle fire. You and others
could be seriously injured or
killed.
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. Fuses of the same amperage can
be temporarily borrowed from
another fuse location, if a fuse goes
out. Replace the fuse as soon as
you can.
Engine Compartment
Fuse Block If the vehicle has a diesel engine,
see the Duramax diesel
supplement.
The engine compartment fuse block
is in the engine compartment, on
the driver side of the vehicle.
Lift the cover to access the fuse
block. CautionSpilling liquid on any electrical
component on the vehicle may
damage it. Always keep the
covers on any electrical
component.
A fuse puller is available in the left
instrument panel fuse block.
The vehicle may not be equipped
with all of the fuses, relays, and
features shown.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
394 Vehicle Care
Fuses Usage
1 Trailer brake Fuses Usage
2 Trailer battery
3 ABS pump Fuses Usage
4 Instrument
panel BEC 1
5 MSB passenger
6 4WD transfer case
electronic control
7 Electric park brake
8 Instrument
panel BEC 2
9 MSB driver
10 Rear window
defogger
11 Starter
12 Cooling fan 1
13 Cooling fan 2
14 Left trailer stop/
Turn lamps
15 Trailer parking
lamps
16 Trailer reverse
lamps
17 Right trailer stop/
Turn lamps
18 Fuel pump

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
Vehicle Care 395Fuses Usage
19 Integrated chassis
control module
20 Electronic
suspension control
module
21 Fuel pump power
module
22 Upfitter 1
23 Upfitter 2
24 Front wiper
25 ABS Valves
26 Upfitter 2
27 Upfitter 3
28 Right parking
lamps
29 Left parking lamps
30 Upfitter 3
31 Upfitter 4
32 Upfitter 4
33 Reverse lamps
34 Engine control
module/Ignition Fuses Usage
35 A/C clutch
36 Heated mirrors
37 Upfitter 1
38 Center
high-mounted
stoplamp
39 Miscellaneous/
Ignition
40 Transmission/
Ignition
41 Fuel pump 2
42 Cooling fan clutch
43 Engine
44 Fuel injectors A
– odd
45 Fuel injectors B
– even
46 O2 Sensor B
47 Throttle control
48 Horn
49 Fog lamps
50 O2 Sensor A Fuses Usage
51 Engine control
module
52 Interior heater
53 Accessory power
module/TPM pump
54 Front washer
55 A/C/Battery
regulated voltage
control
56 A/C module/
Battery pack
57 Transmission
control module/
Engine control
module
58 Headlamps
74 Electric running
boards (if
equipped)
76 Fuel pump prime
Relays Usage
59 Fuel pump
60 Upfitter 2

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
396 Vehicle Care Relays Usage
61 Upfitter 3
62 Upfitter 4
63 Trailer parking
lamps
64 Run/Crank
65 Upfitter 1
66 Fuel pump 2
67 A/C control
68 Starter
69 Rear window
defogger
70 Engine control
module
71 Cooling fan clutch
72 CKT 95
73 CKT 92
75 Fuel pump prime Instrument Panel Fuse
Block (Right)
The right instrument panel fuse
block access door is on the
passenger side edge of the
instrument panel.
Pull off the cover to access the fuse
block.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
Vehicle Care 397
The vehicle may not be equipped
with all of the fuses, relays, and
features shown. Fuses Usage
1 Accessory power
outlet 3 Fuses Usage
2 Accessory power
outlet 4
7 Body control module 4
8 Body control module 8
9 Rear seat
entertainment
10 Cargo lamp
15 Steering wheel
controls
18 Radio
19 –
20 Sunroof
23 Airbag/Info
26 Export/Power take off/
SEO battery 1
27 Obstacle detection/
USB ports
28 Body control module 2
32 SEO battery 2
35 AC inverter
36 Amplifier
37 –

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
398 Vehicle Care Fuses Usage
39 Rear sliding window
42 Right door window
motor
43 Front blower
44 SEO
45 Body control module 6
46 Body control module 7
47 Passenger seat
50 Retained accessory
power
51 Rear sliding
window open
52 Rear sliding window
close Instrument Panel Fuse
Block (Left)
The left instrument panel fuse block
access door is on the driver side
edge of the instrument panel.
Pull off the cover to access the fuse
block.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 4/18/17
Vehicle Care 399
The vehicle may not be equipped
with all of the fuses, relays, and
features shown. Number Usage
1 Accessory power
outlet 2 Number Usage
2 SEO/Retained
accessory power
3 Universal garage door
opener/Interior
rearview mirror
6 Body control module 3
7 Body control module 5
8 Driver window switch/
Mirror switch
9 –
10 Accessory power
outlet/Retained
accessory power
11 Accessory power
outlet battery
12 Accessory power
outlet 1/Cigarette
lighter
13 Discrete logic ignition
switch
14 Switch backlighting
17 Body control module 1
19 –