2019 GMC SIERRA fuel additives

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - CRC - 5/14/19
200 Driving and Operating
Fuel
Top Tier Fuel . . . . . . . . . . . . . . . . . 276
Recommended Fuel (Except6.2L V8 Engine) . . . . . . . . . . . . . 276
Recommended Fuel (6.2L V8 Engine) . . . . . . . . . . . . . . . . . . 277
Prohibited Fuels . . . . . . . . . . . . . . 277
Fuels in Foreign Countries . . . 277
Fuel Additives . . . . . . . . . . . . . . . . 277
E85 or FlexFuel . . . . . . . . . . . . . . 278
Filling the Tank . . . . . . . . . . . . . . . 278
Filling a Portable Fuel Container . . . . . . . . . . . . . . . . . . . 280
Trailer Towing
General TowingInformation . . . . . . . . . . . . . . . . . . 281
Driving Characteristics and
Towing Tips . . . . . . . . . . . . . . . . . 281
Trailer Towing . . . . . . . . . . . . . . . . 286
Towing Equipment . . . . . . . . . . . . 290
Trailer Sway Control (TSC) . . . 299
Trailering App . . . . . . . . . . . . . . . . 301
Conversions and Add-Ons
Add-On Electrical Equipment . . . . . . . . . . . . . . . . . . 311
Adding a Snow Plow or Similar Equipment . . . . . . . . . . . . . . . . . . 312
Pickup Conversion to
Chassis Cab . . . . . . . . . . . . . . . . 315
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 - 5/14/19
Driving and Operating 277
Recommended Fuel (6.2L
V8 Engine)
Do not use any fuel labeled E85 or
FlexFuel. Do not use gasoline with
ethanol levels greater than 15% by
volume.
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:. 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
(Continued)
Caution (Continued)
(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 0277.
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

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-1500-11698638) - 2019 - CRC - 5/14/19
278 Driving and Operating
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
up to 85% ethanol (E85). All other
vehicles should use only the
unleaded gasoline as described in
Recommended Fuel (Except 6.2L
V8 Engine) 0276 or
Recommended Fuel (6.2L
V8 Engine) 0277.
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 0278.
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.
Caution
Do 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.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-1500-11698638) - 2019 - CRC - 5/13/19
468 Index
F
FanEngine . . . . . . . . . . . . . . . . . . . . . . . . 338
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . 13
Filter, Engine Air Cleaner . . . . . . . . . . . 331
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 182
Flashers, Hazard Warning . . . . . . 183
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 388 Changing . . . . . . . . . . . . . . . . . . . . . 390
FlexFuel E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . 278
Floor Console Storage . . . . . . . . . . 128
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 416
Fluid
Automatic Transmission . . . . . . 330
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 341
Four-Wheel DriveTransfer Case . . . . . . . . . . . . . . . 239
Washer . . . . . . . . . . . . . . . . . . . . . . . 339
Fog Lamps . . . . . . . . . . . . . . . . . . . . . 184
Folding Mirrors . . . . . . . . . . . . . . . . . . 58
Forward Automatic Braking . . . . . 268
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . 265
Four-Wheel Drive . . . . . . . . . . 239, 345
Four-Wheel-Drive Light . . . . . . . . . 155 Frequency Statement
Radio . . . . . . . . . . . . . . . . . . . . . . . . . 448
Front Axle . . . . . . . . . . . . . . . . . . . . . . 345
Front Fog Lamp Light . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Front Pedestrian Braking (FPB) System . . . . . . . . . . . . . . . . . 269
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . . 70
Heated and Ventilated . . . . . . . . . . 76
Fuel
Additives . . . . . . . . . . . . . . . . . . . . . 277
Economy Driving . . . . . . . . . . . . . . . 30
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . 280
Filling the Tank . . . . . . . . . . . . . . . 278
Foreign Countries . . . . . . . . . . . . 277
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 145
Low Fuel Warning Light . . . . . . . 160
Management, Active . . . . . . . . . . 231
Prohibited Fuels . . . . . . . . . . . . . . 277
Recommended . . . . . . . . . . 276, 277
Top Tier . . . . . . . . . . . . . . . . . . . . . . 276
Full-Size Spare Tire . . . . . . . . . . . . 399
Fuses Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 355
Fuses and Circuit Breakers . . . 355 Fuses (cont'd)
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . 359, 361
G
Garage Door Opener . . . . . . . . . . . 175Programming . . . . . . . . . . . . . . . . . 175
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . 350
Gauges Engine Coolant
Temperature . . . . . . . . . . . . . . . . 147
Engine Oil Pressure . . . . . . . . . . 146
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Odometer . . . . . . . . . . . . . . . . . . . . . 145
Speedometer . . . . . . . . . . . . . . . . . 144
Tachometer . . . . . . . . . . . . . . . . . . . 145
Trip Odometer . . . . . . . . . . . . . . . . 145
Voltmeter . . . . . . . . . . . . . . . . . . . . . 148
Warning Lights and Indicators . . . . . . . . . . . . . . . . . . . 139
General Information Service and Maintenance . . . . . 418
Towing . . . . . . . . . . . . . . . . . . . . . . . . 281
Vehicle Care . . . . . . . . . . . . . . . . . . 317
Glove Box . . . . . . . . . . . . . . . . . . . . . . 126
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . 442