open gas tank CHEVROLET BLAZER 2020 Owner's Manual

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13557845) - 2020 - CRC - 3/24/20
226 Driving and Operating
Recommended Fuel
Use regular unleaded gasoline
meeting ASTM specification D4814
with a posted octane rating of 87—
(R+M)/2 —or higher. Do not use
gasoline with a posted octane rating
of less than 87, as this may cause
engine knock and will lower fuel
economy.
Do not use any fuel labeled E85 or
FlexFuel. Do not use gasoline with
ethanol levels greater than 15% by
volume.
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
(MMT), which can damage
the emissions control
system and spark plugs.
(Continued)
Caution (Continued)
.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 0226.
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

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13557845) - 2020 - CRC - 3/24/20
Driving and Operating 227
(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.
Filling the Tank
An arrow on the fuel gauge
indicates which side of the vehicle
the fuel door is on. SeeFuel Gauge
0 115.
{Warning
Fuel vapors and fuel fires burn
violently and can cause injury or
death.
Follow these guidelines 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.
(Continued)
Warning (Continued)
.Keep sparks, flames, and
smoking materials away
from fuel.
. Do not leave the fuel pump
unattended.
. Avoid using electronic
devices while refueling.
. Do not re-enter the vehicle
while pumping fuel.
. Keep children away from
the fuel pump and never let
children pump fuel.
. Before touching the fill
nozzle, touch a metallic
object to discharge static
electricity from your body.
. Fuel can spray out if the fill
nozzle is inserted too
quickly. This spray can
happen if the tank is nearly
full, and is more likely in hot
weather. Insert the fill nozzle
slowly and wait for any hiss
noise to stop before
beginning to flow fuel.
To open the fuel door, push and
release the rearward center edge of
the door.
The capless refueling system does
not have a fuel cap. Fully insert and
latch the fill nozzle, then begin
fueling.
{Warning
Overfilling the fuel tank by more
than three clicks of a standard fill
nozzle may cause:
(Continued)

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13557845) - 2020 - CRC - 3/24/20
370 OnStar
Press=to:
. Open the OnStar app on the
infotainment display. See the
infotainment manual for
information on how to use the
OnStar app.
Or
. Give OnStar Turn-by-Turn
Navigation voice commands.
. Obtain and customize the Wi-Fi
hotspot name or SSID and
password, if equipped.
Press
Qto connect to an
Advisor to:
. Verify account information or
update contact information.
. Get driving directions. .
Receive a Diagnostic check of
the vehicle's key operating
systems.
. Receive Roadside Assistance.
. Manage Wi-Fi Settings,
if equipped.
Press
>to get a priority connection
to an OnStar Advisor available
24/7 to:
. Get help for an emergency.
. Be a Good Samaritan or
respond to an AMBER Alert.
. Get assistance in severe
weather or other crisis situations
and find evacuation routes.
OnStar Services
Emergency
Emergency Services require an
active safety and security plan. With
Automatic Crash Response, built-in
sensors can automatically alert a
specially trained OnStar Advisor
who is immediately connected in to
the vehicle to help.
Press
>for a priority connection to
an OnStar Advisor who can contact
emergency service providers, direct
them to your exact location, and
relay important information.
With OnStar Crisis Assist, specially
trained Advisors are available
24 hours a day, 7 days a week, to
provide a central point of contact,
assistance, and information during a
crisis.
With Roadside Assistance, Advisors
can locate a nearby service provider
to help with a flat tire, a battery
jump, or an empty gas tank.

Chevrolet Blazer Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13557845) - 2020 - CRC - 3/24/20
382 Index
Front Pedestrian Braking(FPB) System . . . . . . . . . . . . . . . . . 219
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . . 42
Heated and Ventilated . . . . . . . . . . 47
Fuel Additives . . . . . . . . . . . . . . . . . . . . . 226
Economy, Driving for Better . . . 162
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . 228
Filling the Tank . . . . . . . . . . . . . . . 227
Foreign Countries . . . . . . . . . . . . 226
Gauge . . . . . . . . . . . . . . . . . . . . . . . . .115
Low Fuel Warning Light . . . . . . . 127
Management, Active . . . . . . . . . . 185
Prohibited Fuels . . . . . . . . . . . . . . 226
Recommended . . . . . . . . . . . . . . . 226
Top Tier . . . . . . . . . . . . . . . . . . . . . . 225
Fuses Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 276
Fuses and Circuit Breakers . . . 275
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 279
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 282G
Garage Door Opener . . . . . . . . . . . 141Programming . . . . . . . . . . . . . . . . . 141
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . 271
Gauges Engine CoolantTemperature . . . . . . . . . . . . . . . . .116
Engine Oil Temperature . . . . . . . .116
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . .115
Odometer . . . . . . . . . . . . . . . . . . . . . .114
Speedometer . . . . . . . . . . . . . . . . . .114
Tachometer . . . . . . . . . . . . . . . . . . . .114
Trip Odometer . . . . . . . . . . . . . . . . .114
Voltmeter . . . . . . . . . . . . . . . . . . . . . .117
Warning Lights and Indicators . . . . . . . . . . . . . . . . . . . 107
General Information Service and Maintenance . . . . . 337
Towing . . . . . . . . . . . . . . . . . . . . . . . . 229
Vehicle Care . . . . . . . . . . . . . . . . . . 244
Glove Box . . . . . . . . . . . . . . . . . . . . . . . 91
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . 359
H
Hazard Warning Flashers . . . . . . . 149
Head Restraints . . . . . . . . . . . . . . . . . 40 Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . 273
Automatic . . . . . . . . . . . . . . . . . . . . . 148
Bulb Replacement . . . . . . . . . . . . 273
Daytime Running
Lamps (DRL) . . . . . . . . . . . . . . . . 147
Flash-to-Pass . . . . . . . . . . . . . . . . . 147
High Intensity Discharge
(HID) Lighting . . . . . . . . . . . . . . . 273
High-Beam On Light . . . . . . . . . . 128
High/Low Beam Changer . . . . . 147
Lamps On Reminder . . . . . . . . . 128
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . 51
Steering Wheel . . . . . . . . . . . . . . . . . 99
Heated and Ventilated Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Heated Mirrors . . . . . . . . . . . . . . . . . . . 31
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . 182
Heating . . . . . . . . . . . . . . . . . . . . . . . . . 155
High Voltage Devices and
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 274
High-Beam On Light . . . . . . . . . . . . 128
High-Speed Operation . . . . . . . . . . 293
Hill and Mountain Roads . . . . . . . . 171
Hill Start Assist (HSA) . . . . . . . . . . 194
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 246