2018 CHEVROLET SONIC ignition

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
Driving and Operating 197
With the brake pedal applied, pull
up firmly on the parking brake
handle without pressing the release
button.
SeeShifting Into Park (Automatic
Transmission) 0188 orParking
0 189. If the ignition is in the ON/
RUN position, the brake system
warning light will come on. See
Brake System Warning Light 0115.
To release the parking brake: 1. Hold the brake pedal down.
2. Pull the parking brake handle up until you can press the
release button.
3. Hold the release button in as you move the brake handle all
the way down.
Caution
Driving with the parking brake on
can overheat the brake system
and cause premature wear or
damage to brake system parts.
(Continued)
Caution (Continued)
Make sure that the parking brake
is fully released and the brake
warning light is off before driving.
Driving with the parking brake
applied will cause a warning chime
to sound an a DIC message to
display. Release the parking brake
or stop the vehicle.
Brake Assist
The Brake Assist feature is
designed to assist the driver in
stopping or decreasing vehicle
speed in emergency driving
conditions. This feature uses the
stability system hydraulic brake
control module to supplement the
power brake system under
conditions where the driver has
quickly and forcefully applied the
brake pedal in an attempt to quickly
stop or slow down the vehicle. The
stability system hydraulic brake
control module increases brake
pressure at each corner of the vehicle until the ABS activates.
Minor brake pedal pulsation or
pedal movement during this time is
normal and the driver should
continue to apply the brake pedal as
the driving situation dictates. The
Brake Assist feature will
automatically disengage when the
brake pedal is released or brake
pedal pressure is quickly
decreased.
Hill Start Assist (HSA)
This vehicle has a Hill Start Assist
(HSA) feature, which may be useful
when the vehicle is stopped on a
grade sufficient enough to activate
HSA. This feature is designed to
prevent the vehicle from rolling,
either forward or rearward, during
vehicle drive off. After the driver
completely stops and holds the
vehicle in a complete standstill on a
grade, HSA will be automatically
activated. During the transition
period between when the driver
releases the brake pedal and starts
to accelerate to drive off on a grade,
HSA holds the braking pressure for

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
202 Driving and Operating
Reducing Speed While Using
Cruise Control
If the cruise control system is
already activated:
.Move the thumbwheel toward
SET/− and hold until the desired
lower speed is reached, then
release it.
. To decrease the vehicle speed in
smaller increments, move the
thumbwheel toward SET/−
briefly. For each press, the
vehicle goes about 1.6 km/h
(1 mph) slower.
The speedometer reading can be
displayed in either English or metric
units. See Driver Information Center
(DIC) 0123. The increment value
used depends on the units
displayed. Passing Another Vehicle While
Using Cruise Control
Use the accelerator pedal to
increase the vehicle speed. When
you take your foot off the pedal, the
vehicle slows down to the previous
set cruise control speed. While
pressing the accelerator pedal or
shortly following the release to
override cruise control, briefly
moving the thumbwheel toward
SET/- will result in cruise control set
to the current vehicle speed.
Using Cruise Control on Hills
How well cruise control works on
hills depends on the vehicle speed,
load, and the steepness of the hills.
When going up steep hills, you
might have to step on the
accelerator pedal to maintain the
vehicle speed. When going
downhill, you might have to brake or
shift to a lower gear to keep your
speed down. If the brake pedal is
applied, cruise control will
disengage.Ending Cruise Control
There are five ways to end cruise
control:
.
To disengage cruise control,
step lightly on the brake pedal.
. Press the clutch pedal for
several seconds or shift to
Neutral (manual transmissions).
. Press
n.
. Shift the transmission to
N (Neutral) (automatic
transmissions).
. To turn off cruise control,
press
o.
Erasing Speed Memory
The cruise control set speed is
erased from memory if
ois
pressed or if the ignition is
turned off.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
214 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . 215
California Proposition65 Warning . . . . . . . . . . . . . . . . . 215
California Perchlorate Materials Requirements . . . . . 216
Accessories and Modifications . . . . . . . . . . . . . . . . 216
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 216
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 217
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 219
Engine Oil . . . . . . . . . . . . . . . . . . . . 222
Engine Oil Life System . . . . . . . 224
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 225
Manual Transmission Fluid . . . 226
Hydraulic Clutch . . . . . . . . . . . . . . 226
Engine Air Cleaner/Filter . . . . . . 226
Cooling System . . . . . . . . . . . . . . 228
Engine Overheating . . . . . . . . . . 231
Washer Fluid . . . . . . . . . . . . . . . . . 233
Brakes . . . . . . . . . . . . . . . . . . . . . . . 233
Brake Fluid . . . . . . . . . . . . . . . . . . . 234 Battery - North America . . . . . . 235
Starter Switch Check . . . . . . . . . 236
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 236
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . 237
Park Brake and P (Park) Mechanism Check . . . . . . . . . . 237
Wiper Blade Replacement . . . . 237
Windshield Replacement . . . . . 239
Gas Strut(s) . . . . . . . . . . . . . . . . . . 239Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 240
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 240
Halogen Bulbs . . . . . . . . . . . . . . . . 240
Headlamps and Front Turn Signal . . . . . . . . . . . . . . . . . . . . . . . 241
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 242
License Plate Lamp . . . . . . . . . . 243
Electrical System
Electrical System Overload . . . 243
Fuses and Circuit Breakers . . . 244
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 244 Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 249
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 251
All-Season Tires . . . . . . . . . . . . . . 251
Winter Tires . . . . . . . . . . . . . . . . . . 252
Summer Tires . . . . . . . . . . . . . . . . 252
Tire Sidewall Labeling . . . . . . . . 253
Tire Designations . . . . . . . . . . . . . 255
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . 256
Tire Pressure . . . . . . . . . . . . . . . . . 258
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 259
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 260
Tire Inspection . . . . . . . . . . . . . . . . 263
Tire Rotation . . . . . . . . . . . . . . . . . 264
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 265
Buying New Tires . . . . . . . . . . . . . 265
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 267
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 267
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . 269
Wheel Replacement . . . . . . . . . . 269
Tire Chains . . . . . . . . . . . . . . . . . . . 270
If a Tire Goes Flat . . . . . . . . . . . . 270

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
Vehicle Care 237
2. Apply the parking brake. Beready to apply the regular
brake immediately if the vehicle
begins to move.
3. With the engine off, turn the ignition on, but do not start the
engine. Without applying the
regular brake, try to move the
shift lever out of P (Park) with
normal effort. If the shift lever
moves out of P (Park), contact
your dealer for service.
Ignition Transmission
Lock Check
If equipped with Key Access, while
parked, and with the parking brake
set, try to turn the ignition off in
each shift lever position.
.For automatic transmission
vehicles, the ignition should turn
off only when the shift lever is in
P (Park).
. For manual transmission
vehicles, the ignition should turn
off only when the shift lever is in
Neutral. On all Key Access vehicles, the
ignition key should come out only
when the ignition is off.
Contact your dealer if service is
required.
Park Brake and P (Park)
Mechanism Check
{Warning
When you are doing this check,
the vehicle could begin to move.
You or others could be injured
and property could be damaged.
Make sure there is room in front
of the vehicle in case it begins to
roll. Be ready to apply the regular
brake at once should the vehicle
begin to move.
Park on a fairly steep hill, with the
vehicle facing downhill. Keeping
your foot on the regular brake, set
the parking brake.
. To check the parking brake's
holding ability: With the engine
running and the transmission in N (Neutral), slowly remove foot
pressure from the regular brake
pedal. Do this until the vehicle is
held by the parking brake only.
. To check the P (Park)
mechanism's holding ability:
With the engine running, shift to
P (Park). Then release the
parking brake followed by the
regular brake.
Contact your dealer if service is
required.
Wiper Blade Replacement
Front Wiper Blade
Replacement
Windshield wiper blades should be
inspected for wear or cracking. See
the Maintenance Schedule 0295 for
more information.
Replacement blades come in
different types and are removed in
different ways. For proper
windshield wiper blade length and
type, see Maintenance
Replacement Parts 0305.

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
246 Vehicle Care
Mini Fuses Usage15 Front heated seats
16 Fuel system control module 1
17 Canister vent
18 Washer
19* Fuel pump 20 Engine control module 5
21 Fuel system control module 2/Leveling
22 Transmission control module 1/
DC DC converter
24 Engine control module 1
25 Coil
26 Engine control module 4
27 Engine control module 3
28 Engine control module 2 Mini Fuses Usage
29 Injector/Ignition coil
30 Engine control module
31 Air conditioning clutch
32 Transmission control module
33 Horn
34 Front fog lamps
35 Left high-beam headlamp
36 Right high-beam headlamp
* = If equipped J-CaseFuses Usage
1 Front wipers
2 Antilock brake system pump
3 Blower
4 Run/Crank IEC
6 Cooling fan K4 J-Case
Fuses Usage
7 Cooling fan K5
8* SAI pump 9 Electric vacuum pump
10 Start
* = If equipped Relays Usage
RLY 1 Front wiper control
RLY 2* Rear fog lamp RLY 3 Front wiper speed
RLY 4 Rear window defogger
RLY 5 Run/Crank
RLY 6* –/SAI valve
RLY 8* Fuel pump
RLY 9* SAI pump
RLY 10 Cooling fan K3 RLY 11 P/T
RLY 12 Start

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
248 Vehicle Care
Mini Fuses Usage15 Front heated seats
16 Fuel system control module 1
17 Canister vent
18 Washer
20 Engine control module 5
21 Fuel system control module 2/Leveling
22 Transmission control module 1/
DC DC converter
24 Engine control module 1
25 Coil
26 Engine control module 4
27 Engine control module 3
28 Engine control module 2
29 Injector/Ignition coil Mini Fuses Usage
30 Engine control module
31 Air conditioning clutch
32 Transmission control module
33 Horn
34 Front fog lamps
35 Left high-beam headlamp
36 Right high-beam headlamp
* = If equipped J-CaseFuses Usage
1 Front wipers
2 Antilock brake system pump
3 Blower
4 Run/Crank IEC
5 Power seat
6 Cooling fan K4 J-Case
Fuses Usage
7 Cooling fan K5
9 Electric vacuum pump
10 Start
* = If equipped Relays Usage
RLY 1 Front wiper control
RLY 2* Rear fog lamp
RLY 3 Front wiper speed
RLY 4 Rear defogger
RLY 5 Run/Crank
RLY 9 Cooling fan K2
RLY 10 Cooling fan K3 RLY 11 P/T
RLY 12 Start
RLY 13 Air conditioning clutch

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
Vehicle Care 249
RelaysUsage
RLY 14 High-beam headlamps
RLY 15 Cooling fan K1
* = If equipped
Instrument Panel Fuse
Block
The instrument panel fuse block is
on the underside of the driver side
instrument panel.The vehicle may not be equipped
with all of the fuses, relays, and
features shown. Fuses Usage
DLIS Discrete logic ignition switch
DLC Data link connector
SDM Sensing and diagnostic module
L/GATE Liftgate PWR
WNDW REAR Rear power
window
BCM8 Body control module 8
BCM7 Body control module 7
BCM6 Body control module 6
BCM5 Body control module 5
BCM4 Body control module 4
BCM3 Body control module 3
BCM2 Body control module 2

Chevrolet Sonic Owner Manual (GMNA-Localizing-U.S./Canada-11373973) -
2018 - crc - 10/9/17
Vehicle Care 261
When a low tire pressure condition
is detected, the TPMS illuminates
the low tire pressure warning light
located on the instrument cluster.
If the warning light comes on, stop
as soon as possible and inflate the
tires to the recommended pressure
shown on the Tire and Loading
Information label. SeeVehicle Load
Limits 0177.
The low tire pressure warning light
comes on at each ignition cycle until
the tires are inflated to the correct
inflation pressure.
The low tire pressure warning light
may come on in cool weather when
the vehicle is first started, and then
turn off as the vehicle is driven. This
could be an early indicator that the
air pressure is getting low and must
be inflated to the proper pressure. A Tire and Loading Information label
shows the size of the original
equipment tires and the correct
inflation pressure for the tires when
they are cold. See
Vehicle Load
Limits 0177, for an example of the
Tire and Loading Information label
and its location. Also see Tire
Pressure 0258.
The TPMS can warn about a low
tire pressure condition but it does
not replace normal tire
maintenance. See Tire Inspection
0 263, Tire Rotation 0264 andTires
0 251.
Caution
Tire sealant materials are not all
the same. A non-approved tire
sealant could damage the TPMS
sensors. TPMS sensor damage
caused by using an incorrect tire
sealant is not covered by the
vehicle warranty. Always use only
the GM approved tire sealant
available through your dealer or
included in the vehicle.
TPMS Malfunction Light
The TPMS will not function properly
if one or more of the TPMS sensors
are missing or inoperable. When the
system detects a malfunction, the
low tire pressure warning light
flashes for about one minute and
then stays on for the remainder of
the ignition cycle. The malfunction
light comes on at each ignition cycle
until the problem is corrected. Some
of the conditions that can cause this
to come on are:
.
One of the road tires has been
replaced with the spare tire. The
spare tire does not have a
TPMS sensor. The malfunction
light should go off after the road
tire is replaced and the sensor
matching process is performed
successfully. See "TPMS Sensor
Matching Process" later in this
section.
. The TPMS sensor matching
process was not done or not
completed successfully after
rotating the tires. The
malfunction light should go off
after successfully completing the