2018 GMC YUKON XL fuel pump

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
Instruments and Controls 137
Fuel Gauge
English Standard Theme Shown,
Metric Similar
When the ignition is on, the fuel
gauge indicates about how much
fuel is left in the tank.
There is an arrow near the fuel
gauge pointing to the side of the
vehicle the fuel door is on.
When the indicator nears empty, the
low fuel light comes on. There still is
a little fuel left, but the vehicle
should be refueled soon. Here are four things that some
owners ask about. None of these
show a problem with the fuel gauge:
.
At the service station, the fuel
pump shuts off before the gauge
reads full.
.
It takes a little more or less fuel
to fill up than the gauge
indicated. For example, the
gauge may have indicated the
tank was half full, but it actually
took a little more or less than
half the tank's capacity to fill
the tank.
.
The gauge moves a little while
turning a corner or speeding up.
.
The gauge takes a few seconds
to stabilize after the ignition is
turned on, and goes back to
empty when the ignition is
turned off. Engine Oil Pressure
Gauge
Metric Standard Theme

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/21/17
256 Driving and Operating If your vehicle is able to use E85 or
FlexFuel, GM Fuel System
Treatment Cleaner - FlexFuel is the
only recommended additive for use.
Do not use any other additives with
an E85 or FlexFuel vehicle. See
E85 or FlexFuel 0 256 .
E85 or FlexFuel Vehicles marked as “ E85 ” or
FlexFuel can use either unleaded
gasoline or ethanol fuel containing
up to 85% ethanol (E85). All other
vehicles should use only the
unleaded gasoline as described in
Fuel 0 254 .
The use of E85 or FlexFuel is
encouraged when the vehicle is
designed to use it. E85 or FlexFuel
is made from renewable sources.
Many fuel stations will not have an
85% ethanol fuel (E85) pump
available. Those stations that do
have E85 should have a label
indicating the FlexFuel ethanol
content. Do not use the fuel if the
ethanol content is greater than 85%. The starting characteristics of E85
or FlexFuel make it unsuitable for
use when temperatures fall below
− 18 °C (0 °F). Use gasoline or add
gasoline to the E85 or FlexFuel.
Because E85 or FlexFuel has less
energy per liter (gallon) than
gasoline, the vehicle will need to be
refilled more often. See Filling the
Tank 0 256 .
CautionSome additives are not
compatible with E85 or FlexFuel
and can harm the vehicle's fuel
system. Do not add anything to
E85 or FlexFuel. Damage caused
by additives would not be covered
by the vehicle warranty.
Caution
Do not use fuel containing
methanol. It can corrode metal
parts in the fuel system and also
(Continued) Caution (Continued) damage plastic and rubber parts.
That damage would not be
covered under the vehicle
warranty.
Filling the Tank
{ WarningFuel vapors and fuel fires burn
violently and can cause injury or
death.
.
To help avoid injuries to you
and others, read and follow
all the instructions on the
fuel pump island.
.
Turn off the engine when
refueling.
.
Keep sparks, flames, and
smoking materials away
from fuel.
.
Do not leave the fuel pump
unattended.
(Continued)

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/21/17
Driving and Operating 257Warning (Continued).
Do not use a cell phone
while refueling.
.
Do not reenter the vehicle
while pumping fuel.
.
Keep children away from
the fuel pump and never let
children pump fuel.
.
Fuel can spray out if the
refueling nozzle is inserted
too quickly. This spray can
happen if the tank is nearly
full, and is more likely in hot
weather. Insert the refueling
nozzle slowly and wait for
any hiss noise to stop prior
to beginning to flow fuel. To open the fuel door, push and
release the rearward center edge of
the door.
The vehicle has a capless refueling
system and does not have a fuel
cap. The filling nozzle must be fully
inserted and latched prior to starting
fuel flow. { WarningOverfilling the fuel tank by more
than three clicks of a standard fill
nozzle may cause:
.
Vehicle performance issues,
including engine stalling and
damage to the fuel system.
.
Fuel spills.
.
Potential fuel fires.
Be careful not to spill fuel. Wait a
few seconds after you have finished
pumping before removing the
nozzle. Clean fuel from painted
surfaces as soon as possible. See
Exterior Care 0 360 .
{ Warning
If a fire starts while you are
refueling, do not remove the
nozzle. Shut off the flow of fuel by
shutting off the pump or by
notifying the station attendant.
Leave the area immediately.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/21/17
258 Driving and Operating Filling the Tank with a Portable
Gas Can
If the vehicle runs out of fuel and
must be filled from a portable
gas can:
1. Locate the capless funnel
adapter from inside the vehicle.
2. Insert and latch the funnel into
the capless fuel system.
{ Warning
Attempting to refuel without using
the funnel adapter may cause fuel
spillage and damage the capless
fuel system. This could cause a
fire and you or others could be
badly burned and the vehicle
could be damaged. 3. Remove and clean the funnel
adapter and return to the
storage location.
Filling a Portable Fuel
Container
{ WarningFilling a portable fuel container
while it is in the vehicle can cause
fuel vapors that can ignite either
by static electricity or other
means. You or others could be
badly burned and the vehicle
could be damaged. Always:
.
Use approved fuel
containers.
.
Remove the container from
the vehicle, trunk, or pickup
bed before filling.
.
Place the container on the
ground.
.
Place the nozzle inside the
fill opening of the container
before dispensing fuel, and
(Continued) Warning (Continued) keep it in contact with the fill
opening until filling is
complete.
.
Fill the container no more
than 95% full to allow for
expansion.
.
Do not smoke, light
matches, or use lighters
while pumping fuel.
.
Avoid using cell phones or
other electronic devices.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
312 Vehicle Care Fuses Usage
4 Passenger
motorized seat belt
5 Suspension
leveling
compressor
6 4WD transfer case
electronic control
7 –
8 –
10 Electric parking
brake/ –
11 –
12 –
13 Interior BEC LT2
14 Rear BEC 1
15 –
16 –
17 Driver motorized
seat belt
18 –
19 –
20 – Fuses Usage
21 Automatic
headlamp leveling/
Exhaust solenoid
22 Fuel pump
23 Integrated chassis
control module
24 Real time
dampening
25 Fuel pump power
module
26 – /Battery regulated
voltage control
27 –
28 Upfitter 2
30 Wiper
31 Trailer interface
module
32 –
33 –
34 Reverse lamps
35 Antilock brake
system valve
36 Trailer brakes Fuses Usage
38 –
39 Right trailer
stoplamp/Turn
signal lamp
40 Left trailer
stoplamp/turn
signal lamp
41 Trailer parking
lamps
42 Right parking
lamps
43 Left parking lamps
44 Upfitter 3
45 Automatic level
control/Run/Crank
46 –
47 Upfitter 4
49 Reverse lamps
50 –
52 –
53 –
54 –

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
Vehicle Care 313Fuses Usage
55 –
56 –
57 –
58 –
59 Euro trailer
60 Air conditioning
control
61 –
62 –
63 Upfitter 1
64 –
65 –
66 –
67 Trailer battery
68 Secondary
fuel pump
69 RC upfitter 3 and 4
70 VBAT
upfitter 3 and 4
71 –
73 – Fuses Usage
74 Engine control
module/Ignition
75 Miscellaneous/
Ignition/ –
76 Transmission/
Ignition
77 RC upfitter 1 and 2
78 VBAT
upfitter 1 and 2
79 –
80 –
81 –
82 –
83 Euro trailer/RC
85 –
86 –
87 Engine
88 Injector A – odd
89 Injector B – even
90 O2 sensor B
91 Throttle control Fuses Usage
93 Horn
94 Fog lamps
95 High-beam
headlamps
96 –
97 –
98 –
99 –
100 O2 sensor A
101 Engine control
module
102 Engine control
module/
Transmission
control module
103 Auxiliary interior
heater
104 Starter
105 –
106 –
107 Aeroshutter
108 –

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-11349262) - 2018 - crc - 6/20/17
314 Vehicle Care Fuses Usage
109 Police upfitter
110 –
111 –
113 –
114 Front windshield
washer
115 Rear window
washer
116 Left cooling fan
117 Fuel pump prime
118 –
119 –
120 Fuel pump prime
121 Right HID
headlamp
122 Left HID headlamp
123 Right cooling fan
Relays Usage
9 Fuel pump
29 Upfitter 2 Relays Usage
37 Upfitter 3
48 Upfitter 4
51 Parking lamp
64 Secondary
fuel pump
72 Upfitter 1
84 Run/Crank
92 Engine control
module
112 Starter 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.