2019 GMC SIERRA DENALI fuel additives

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/16/18
Driving and Operating 197Fuel Top Tier Fuel . . . . . . . . . . . . . . . . . 271
Recommended Fuel (Except
6.2L V8 Engine) . . . . . . . . . . . . . 271
Recommended Fuel (6.2L
V8 Engine) . . . . . . . . . . . . . . . . . . 271
Prohibited Fuels . . . . . . . . . . . . . . 272
Fuels in Foreign Countries . . . 272
Fuel Additives . . . . . . . . . . . . . . . . 272
E85 or FlexFuel . . . . . . . . . . . . . . 272
Filling the Tank . . . . . . . . . . . . . . . 273
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . 275
Trailer Towing General Towing
Information . . . . . . . . . . . . . . . . . . 276
Driving Characteristics and
Towing Tips . . . . . . . . . . . . . . . . . 276
Trailer Towing . . . . . . . . . . . . . . . . 281
Towing Equipment . . . . . . . . . . . . 285
Trailer Sway Control (TSC) . . . 293
Trailering App . . . . . . . . . . . . . . . . 296
Conversions and Add-Ons Add-On Electrical
Equipment . . . . . . . . . . . . . . . . . . 306
Adding a Snow Plow or Similar
Equipment . . . . . . . . . . . . . . . . . . 307
Pickup Conversion to
Chassis Cab . . . . . . . . . . . . . . . . 310 Driving Information Distracted Driving Distraction comes in many forms
and can take your focus from the
task of driving. Exercise good
judgment and do not let other
activities divert your attention away
from the road. Many local
governments have enacted laws
regarding driver distraction. Become
familiar with the local laws in
your area.
To avoid distracted driving, keep
your eyes on the road, keep your
hands on the steering wheel, and
focus your attention on driving.
.
Do not use a phone in
demanding driving situations.
Use a hands-free method to
place or receive necessary
phone calls.
.
Watch the road. Do not read,
take notes, or look up
information on phones or other
electronic devices. .
Designate a front seat
passenger to handle potential
distractions.
.
Become familiar with vehicle
features before driving, such as
programming favorite radio
stations and adjusting climate
control and seat settings.
Program all trip information into
any navigation device prior to
driving.
.
Wait until the vehicle is parked
to retrieve items that have fallen
to the floor.
.
Stop or park the vehicle to tend
to children.
.
Keep pets in an appropriate
carrier or restraint.
.
Avoid stressful conversations
while driving, whether with a
passenger or on a cell phone.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/16/18
272 Driving and Operating Premium unleaded gasoline
meeting ASTM specification D4814
with a posted octane rating of 93 is
highly recommended for best
performance and fuel economy.
Unleaded gasoline with an octane
rated as low as 87 can be used.
Using unleaded gasoline rated
below 93 octane, however, will lead
to reduced acceleration and fuel
economy. If knocking occurs, use a
gasoline rated at 93 octane as soon
as possible, otherwise, the engine
could be damaged. If heavy
knocking is heard when using
gasoline with a 93 octane rating, the
engine needs service.
Prohibited Fuels Caution
Do not use fuels with any of the
following conditions; doing so
may damage the vehicle and void
its warranty:
(Continued) Caution (Continued) .
For vehicles that are not
FlexFuel, fuel labeled
greater than 15% ethanol by
volume, such as mid-level
ethanol blends (16 – 50%
ethanol), E85, or FlexFuel.
.
Fuel with any amount of
methanol, methylal,
ferrocene, and aniline.
These fuels can corrode
metal fuel system parts or
damage plastic and rubber
parts.
.
Fuel containing metals such
as methylcyclopentadienyl
manganese tricarbonyl
(MMT), which can damage
the emissions control
system and spark plugs.
.
Fuel with a posted octane
rating of less than the
recommended fuel. Using
this fuel will lower fuel
economy and performance,
and may decrease the life of
the emissions catalyst. Fuels in Foreign
Countries The U.S., Canada, and Mexico post
fuel octane ratings in anti-knock
index (AKI). For fuel not to use in a
foreign country, see Prohibited
Fuels 0 272 .
Fuel Additives TOP TIER Detergent Gasoline is
highly recommended for use with
your vehicle. If your country does
not have TOP TIER Detergent
Gasoline, add ACDelco Fuel
System Treatment Plus − Gasoline to
the vehicle ’ s gasoline fuel tank at
every oil change or 15,000 km
(9,000 mi), whichever occurs first.
TOP TIER Detergent Gasoline and
ACDelco Fuel System Treatment
Plus − Gasoline will help keep your
vehicle ’ s engine fuel deposit free
and performing optimally.
E85 or FlexFuel Vehicles with a yellow fuel sticker
on the fuel door can use either
unleaded gasoline or fuel containing

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - crc - 5/16/18
Driving and Operating 273up to 85% ethanol (E85). All other
vehicles should use only the
unleaded gasoline as described in
Recommended Fuel (Except 6.2L
V8 Engine) 0 271 or Recommended
Fuel (6.2L V8 Engine) 0 271 .
The use of E85 or FlexFuel is
encouraged when the vehicle is
designed to use it. E85 or FlexFuel
is made from renewable sources.
To help locate fuel stations that
carry E85 or FlexFuel, the U.S.
Department of Energy has an
alternative fuel website. See
www.afdc.energy.gov/afdc/locator/
stations.
E85 or FlexFuel should meet ASTM
Specification D 5798 or CAN/
CGSB – 3.512 in Canada. Do not use
the fuel if the ethanol content is
greater than 85%. Fuel mixtures that
do not meet ASTM or CGSB
specifications can affect driveability
and could cause the malfunction
indicator lamp to come on. 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 0 273 .
The only GM approved aftermarket
additive is ACDelco Fuel System
Treatment Plus-FlexFuel. Follow the
instructions on the bottle for proper
use. This product is available at
your GM dealer.
Caution
Some additives are not
compatible with E85 or FlexFuel
and can harm the vehicle's fuel
system. Use only additives
approved by GM for E85 or
FlexFuel vehicles. Damage
caused by unapproved additives
would not be covered by the
vehicle warranty. CautionDo not use fuel containing
methanol. It can corrode metal
parts in the fuel system and also
damage plastic and rubber parts.
That damage would not be
covered under the vehicle
warranty.
Filling the Tank If the vehicle has a diesel engine,
see the Duramax diesel supplement
for more information.
{ Warning
Fuel 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.
(Continued)

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - crc - 5/16/18
Index 463F Fan
Engine . . . . . . . . . . . . . . . . . . . . . . . . 333
Features
Memory . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter,
Engine Air Cleaner . . . . . . . . . . . 326
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 179
Flashers, Hazard Warning . . . . . . 180
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 383
Changing . . . . . . . . . . . . . . . . . . . . . 385
FlexFuel
E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Floor Console Storage . . . . . . . . . . 127
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 411
Fluid
Automatic Transmission . . . . . . 325
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 336
Four-Wheel Drive
Transfer Case . . . . . . . . . . . . . . . 235
Washer . . . . . . . . . . . . . . . . . . . . . . . 334
Fog Lamps . . . . . . . . . . . . . . . . . . . . . 181
Folding Mirrors . . . . . . . . . . . . . . . . . . 57
Forward Automatic Braking . . . . . 263
Forward Collision Alert
(FCA) System . . . . . . . . . . . . . . . . . 260
Four-Wheel Drive . . . . . . . . . . 235, 340
Four-Wheel-Drive Light . . . . . . . . . 153 Frequency Statement
Radio . . . . . . . . . . . . . . . . . . . . . . . . . 443
Front Axle . . . . . . . . . . . . . . . . . . . . . . 340
Front Fog Lamp
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Front Pedestrian Braking
(FPB) System . . . . . . . . . . . . . . . . . 264
Front Seats
Adjustment . . . . . . . . . . . . . . . . . . . . . 69
Heated and Ventilated . . . . . . . . . . 75
Fuel
Additives . . . . . . . . . . . . . . . . . . . . . 272
Economy Driving . . . . . . . . . . . . . . . 29
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . 275
Filling the Tank . . . . . . . . . . . . . . . 273
Foreign Countries . . . . . . . . . . . . 272
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 143
Low Fuel Warning Light . . . . . . . 157
Management, Active . . . . . . . . . . 227
Prohibited Fuels . . . . . . . . . . . . . . 272
Recommended . . . . . . . . . . . . . . . 271
Top Tier . . . . . . . . . . . . . . . . . . . . . . 271
Full-Size Spare Tire . . . . . . . . . . . . 394
Fuses
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 350
Fuses and Circuit Breakers . . . 350 Fuses (cont'd)
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . 354, 356
G Garage Door Opener . . . . . . . . . . . 172
Programming . . . . . . . . . . . . . . . . . 172
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . 345
Gauges
Engine Coolant
Temperature . . . . . . . . . . . . . . . . 145
Engine Oil Pressure . . . . . . . . . . 144
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Odometer . . . . . . . . . . . . . . . . . . . . . 142
Speedometer . . . . . . . . . . . . . . . . . 142
Tachometer . . . . . . . . . . . . . . . . . . . 143
Trip Odometer . . . . . . . . . . . . . . . . 142
Voltmeter . . . . . . . . . . . . . . . . . . . . . 146
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . 137
General Information
Service and Maintenance . . . . . 413
Towing . . . . . . . . . . . . . . . . . . . . . . . . 276
Vehicle Care . . . . . . . . . . . . . . . . . . 312
Glove Box . . . . . . . . . . . . . . . . . . . . . . 125
GM Mobility Reimbursement
Program . . . . . . . . . . . . . . . . . . . . . . . 437