2017 BUICK REGAL wiring

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9804381) - 2017 - crc - 8/30/16
Seats and Restraints 71
Servicing the
Airbag-Equipped Vehicle
Airbags affect how the vehicle
should be serviced. There are parts
of the airbag system in several
places around the vehicle. Your
dealer and the service manual have
information about servicing the
vehicle and the airbag system. To
purchase a service manual, see
Service Publications Ordering
Information0318.
{Warning
For up to 10 seconds after the
vehicle is turned off and the
battery is disconnected, an airbag
can still inflate during improper
service. You can be injured if you
are close to an airbag when it
inflates. Avoid yellow connectors.
They are probably part of the
airbag system. Be sure to follow
proper service procedures, and
make sure the person performing
work for you is qualified to do so.
Adding Equipment to the
Airbag-Equipped Vehicle
Adding accessories that change the
vehicle's frame, bumper system,
height, front end, or side sheet
metal may keep the airbag system
from working properly. The
operation of the airbag system can
also be affected by changing any
parts of the front seats, safety belts,
airbag sensing and diagnostic
module, steering wheel, instrument
panel, any of the airbag modules,
ceiling or pillar garnish trim,
overhead console, front sensors,
side impact sensors, or airbag
wiring.
Your dealer and the service manual
have information about the location
of the airbag sensors, sensing and
diagnostic module, and airbag
wiring.
In addition, the vehicle has a
passenger sensing system for the
front outboard passenger position,
which includes sensors that are part
of the passenger seat. The
passenger sensing system may not
operate properly if the original seat trim is replaced with non-GM
covers, upholstery, or trim, or with
GM covers, upholstery, or trim
designed for a different vehicle. Any
object, such as an aftermarket seat
heater or a comfort enhancing pad
or device, installed under or on top
of the seat fabric, could also
interfere with the operation of the
passenger sensing system. This
could either prevent proper
deployment of the passenger
airbag(s) or prevent the passenger
sensing system from properly
turning off the passenger airbag(s).
See
Passenger Sensing System
0 67.
If the vehicle has rollover roof-rail
airbags, see Different Size Tires
and Wheels 0260 for additional
important information.
If you have to modify your vehicle
because you have a disability and
you have questions about whether
the modifications will affect the
vehicle's airbag system, or if you
have questions about whether the
airbag system will be affected if the
vehicle is modified for any other

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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110 Instruments and Controls
grocery bag, laptop, or other
electronic device. To turn off the
reminder light and/or chime, remove
the object from the seat or buckle
the safety belt.
Airbag Readiness Light
This light shows if there is an
electrical problem with the airbag
system. The system check includes
the airbag sensor(s), passenger
sensing system, the pretensioners,
the airbag modules, the wiring, and
the crash sensing and diagnostic
module. For more information on the
airbag system, seeAirbag System
0 61.
The airbag readiness light comes on
for several seconds when the
vehicle is started. If the light does
not come on then, have it fixed
immediately.
{Warning
If the airbag readiness light stays
on after the vehicle is started or
comes on while driving, it means
the airbag system might not be
working properly. The airbags in
the vehicle might not inflate in a
crash, or they could even inflate
without a crash. To help avoid
injury, have the vehicle serviced
right away.
Passenger Airbag Status
Indicator
The vehicle has a passenger
sensing system. See Passenger
Sensing System 067 for important
safety information. The instrument
panel has a passenger airbag status
indicator.
When the vehicle is started, the
passenger airbag status indicator
will light ON and OFF for several
seconds as a system check. Then,
after several more seconds, the
status indicator will light either ON
or OFF to let you know the status of
the front outboard passenger frontal
airbag.
If the word ON is lit on the
passenger airbag status indicator, it
means that the front outboard
passenger frontal airbag is allowed
to inflate.
If the word OFF is lit on the airbag
status indicator, it means that the
passenger sensing system has
turned off the front outboard
passenger frontal airbag.
If, after several seconds, both status
indicator lights remain on, or if there
are no lights at all, there may be a

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9804381) - 2017 - crc - 8/30/16
Vehicle Care 211
Vehicle Care
General Information
General Information . . . . . . . . . . 212
California Proposition65 Warning . . . . . . . . . . . . . . . . . 212
California Perchlorate Materials Requirements . . . . . 212
Accessories and Modifications . . . . . . . . . . . . . . . . 213
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 213
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 214
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 215
Engine Oil . . . . . . . . . . . . . . . . . . . . 218
Engine Oil Life System . . . . . . . 220
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 221
Engine Air Cleaner/Filter . . . . . . 222
Cooling System . . . . . . . . . . . . . . 223
Engine Coolant . . . . . . . . . . . . . . . 224
Engine Overheating . . . . . . . . . . 227
Washer Fluid . . . . . . . . . . . . . . . . . 228
Brakes . . . . . . . . . . . . . . . . . . . . . . . 229
Brake Fluid . . . . . . . . . . . . . . . . . . . 230
Battery - North America . . . . . . 231
All-Wheel Drive . . . . . . . . . . . . . . . 232 Starter Switch Check . . . . . . . . . 232
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 232
Ignition Transmission Lock
Check . . . . . . . . . . . . . . . . . . . . . . . 233
Park Brake and P (Park) Mechanism Check . . . . . . . . . . 233
Wiper Blade Replacement . . . . 233
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 234
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 234
Halogen Bulbs . . . . . . . . . . . . . . . . 234
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . 235
Headlamps, Front Turn Signal and Parking Lamps . . . . . . . . . 235
Fog Lamps . . . . . . . . . . . . . . . . . . . 235
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 236
License Plate Lamp . . . . . . . . . . 236
Replacement Bulbs . . . . . . . . . . . 237
Electrical System
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . 237
Electrical System Overload . . . 238
Fuses and Circuit Breakers . . . 238 Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 239
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 241
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 243
All-Season Tires . . . . . . . . . . . . . . 244
Winter Tires . . . . . . . . . . . . . . . . . . 244
Low-Profile Tires . . . . . . . . . . . . . 244
Summer Tires . . . . . . . . . . . . . . . . 245
Tire Sidewall Labeling . . . . . . . . 245
Tire Designations . . . . . . . . . . . . . 247
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . 248
Tire Pressure . . . . . . . . . . . . . . . . . 251
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . 252
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 252
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 253
Tire Inspection . . . . . . . . . . . . . . . . 257
Tire Rotation . . . . . . . . . . . . . . . . . 257
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 258
Buying New Tires . . . . . . . . . . . . . 259
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 260
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 261

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9804381) - 2017 - crc - 8/30/16
236 Vehicle Care
5. Reconnect the electricalconnector to the bulb
assembly.
Taillamps, Turn Signal,
Stoplamps, and Back-Up
Lamps
To replace any one of these bulbs:
1. Open the trunk. See Trunk
Release 09.
2. Remove the trunk trim panel push pin.
3. Pull the trunk trim panel back to gain access to the taillamp
assembly.
4. Remove the three nuts that secure the taillamp assembly. 5. Remove the taillamp assembly
and disconnect the wiring
harness connector.
6. Turn the bulb socket counterclockwise to remove it.
7. Pull the bulb from the socket.
8. Install a new bulb.
9. Turn the bulb socket clockwise to install it.
10. Reverse Steps 2–4 to reinstall the taillamp assembly.
License Plate Lamp
Lamp Assembly
Bulb Assembly
1. Bulb Socket
2. Bulb
3. Lamp Assembly
To replace one of these bulbs:
1. Push the release tab toward the lamp assembly.
2. Pull the lamp assembly down to remove.
3. Turn the bulb socket (1) counterclockwise to remove it
from the lamp assembly (3).
4. Pull the bulb (2) straight out of the bulb socket (1).

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9804381) - 2017 - crc - 8/30/16
Vehicle Care 237
5. Push the replacement bulbstraight into the bulb socket
and turn the bulb socket
clockwise to install it into the
lamp assembly.
6. Push the lamp assembly back into position until the release
tab locks into place.Replacement Bulbs
Exterior Lamp Bulb
Number
Back-up Lamp W16W or 921
Fog Lamp H10
Front Turn Signal
Lamp (Base) WY21W
Front Turn Signal
Lamp (Uplevel) PSY24W
Low-Beam
Headlamp (Base) HIR2
High-Beam
Headlamp (Base) HIR2
License Plate Lamp 194
Daytime Running
Lamp (DRL) (Base) W21/
5W ULL
Turn Signal Lamp W21W or 7440
Sidemarker Lamp 194
For replacement bulbs not listed
here, contact your dealer.
Electrical System
High Voltage Devices and
Wiring
{Warning
Exposure to high voltage can
cause shock, burns, and even
death. The high voltage
components in the vehicle can
only be serviced by technicians
with special training.
High voltage components are
identified by labels. Do not
remove, open, take apart,
or modify these components.
High voltage cable or wiring has
orange covering or labels. Do not
probe, tamper with, cut, or modify
high voltage cable or wiring.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9804381) - 2017 - crc - 8/30/16
238 Vehicle Care
Electrical System
Overload
The vehicle has fuses and circuit
breakers to protect against an
electrical system overload.
When the current electrical load is
too heavy, the circuit breaker opens
and closes, protecting the circuit
until the current load returns to
normal or the problem is fixed. This
greatly reduces the chance of circuit
overload and fire caused by
electrical problems.
Fuses and circuit breakers protect
power devices in the vehicle.
Replace a bad fuse with a new one
of the identical size and rating.
If there is a problem on the road and
a fuse needs to be replaced, the
same amperage fuse can be
borrowed. Choose some feature of
the vehicle that is not needed to use
and replace it as soon as possible.
Headlamp Wiring
An electrical overload may cause
the lamps to go on and off, or in
some cases to remain off. Have theheadlamp wiring checked right away
if the lamps go on and off or
remain off.
Windshield Wipers
If the wiper motor overheats due to
heavy snow or ice, the windshield
wipers will stop until the motor cools
and will then restart.
Although the circuit is protected
from electrical overload, overload
due to heavy snow or ice may
cause wiper linkage damage.
Always clear ice and heavy snow
from the windshield before using the
windshield wipers.
If the overload is caused by an
electrical problem and not snow or
ice, be sure to get it fixed.
Fuses and Circuit
Breakers
The wiring circuits in the vehicle are
protected from short circuits by a
combination of fuses and circuit
breakers. This greatly reduces the
chance of damage caused by
electrical problems.
To check a fuse, look at the
silver-colored band inside the fuse.
If the band is broken or melted,
replace the fuse. Be sure to replace
a bad fuse with a new one of the
identical size and rating.
Fuses of the same amperage can
be temporarily borrowed from
another fuse location, if a fuse goes
out. Replace the fuse as soon as
possible.
To identify and check fuses, circuit
breakers, and relays, see
Engine
Compartment Fuse Block 0239 and
Instrument Panel Fuse Block 0241.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9804381) - 2017 - crc - 8/30/16
Index 337
Fuel (cont'd)Additives . . . . . . . . . . . . . . . . . . . . . 207
Economy Driving . . . . . . . . . . . . . . . 23
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . 208
Filling the Tank . . . . . . . . . . . . . . . 207
Foreign Countries . . . . . . . . . . . . 207
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 107
Low Fuel Warning Light . . . . . . . .118
Requirements, California . . . . . 206
System Messages . . . . . . . . . . . . 129
Fuses Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 239
Fuses and Circuit Breakers . . . 238
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 241
G
Garage Door Opener . . . . . . . . . . . 140Programming . . . . . . . . . . . . . . . . . 140
Gauges Engine CoolantTemperature . . . . . . . . . . . . . . . . 108
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Odometer . . . . . . . . . . . . . . . . . . . . . 106
Speedometer . . . . . . . . . . . . . . . . . 106
Tachometer . . . . . . . . . . . . . . . . . . . 107
Trip Odometer . . . . . . . . . . . . . . . . 107 Gauges (cont'd)
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . 100
General Information
Service and Maintenance . . . . . 293
Towing . . . . . . . . . . . . . . . . . . . . . . . . 209
Vehicle Care . . . . . . . . . . . . . . . . . . 212
Glove Box . . . . . . . . . . . . . . . . . . . . . . . 92
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . 313
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . 234
Hazard Warning Flashers . . . . . . . 145
Head Restraints . . . . . . . . . . . . . . . . . 47
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . 234
Automatic . . . . . . . . . . . . . . . . . . . . . 144
Bulb Replacement . . . . . . . . . . . . 234
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . 144
Flash-to-Pass . . . . . . . . . . . . . . . . . 144
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . 235
High-Beam On Light . . . . . . . . . . .118
High/Low Beam Changer . . . . . 143
Lamps On Reminder . . . . . . . . . .119
Heated
Steering Wheel . . . . . . . . . . . . . . . . . 96 Heated Front Seats . . . . . . . . . . . . . . 52
Heated Mirrors . . . . . . . . . . . . . . . . . . . 42
Heater
Engine . . . . . . . . . . . . . . . . . . . . . . . . 172
Heating . . . . . . . . . . . . . . . . . . . . . . . . . 150
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 237
High-Beam On Light . . . . . . . . . . . . 118
High-Speed Operation . . . . . . . . . . 252
Hill and Mountain Roads . . . . . . . . 160
Hill Start Assist (HSA) . . . . . . . . . . 182
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
How to Wear Safety Belts Properly . . . . . . . . . . . . . . . . . . . . . . . . 56
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
I
Ignition Positions . . . . . . . . . . 167, 168
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . . . 233
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 39
Indicator Vehicle Ahead . . . . . . . . . . . . . . . . .115
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . 74
Infotainment . . . . . . . . . . . . . . . . . . . . 149
Infotainment System . . . . . . . . . . . . 322
Instrument Cluster . . . . . . . . . 101, 104

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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Index 343
Transmission (cont'd)Fluid, Automatic . . . . . . . . . . . . . . 221
Messages . . . . . . . . . . . . . . . . . . . . 133
Transportation Program,
Courtesy . . . . . . . . . . . . . . . . . . . . . . 315
Trip Odometer . . . . . . . . . . . . . . . . . . 107
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . . 145
Turn Signal Bulb Replacement . . . . . . . . . . . . 236
U
Uniform Tire Quality Grading . . . 261
Universal Remote System . . . . . . 140Operation . . . . . . . . . . . . . . . . . . . . . 142
Programming . . . . . . . . . . . . . . . . . 140
Using This Manual . . . . . . . . . . . . . . . . 2
V
Vehicle Alarm System . . . . . . . . . . . . . . . . . . 38
Canadian Owners . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . 157
Identification Number (VIN) . . . 306
Load Limits . . . . . . . . . . . . . . . . . . . 163
Messages . . . . . . . . . . . . . . . . . . . . 125
Personalization . . . . . . . . . . . . . . . 134
Remote Start . . . . . . . . . . . . . . . . . . . 32 Vehicle (cont'd)
Security . . . . . . . . . . . . . . . . . . . . . . . . 38
Towing . . . . . . . . . . . . . . . . . . . . . . . . 281
Vehicle Ahead Indicator . . . . . . . . 115
Vehicle Care
Storing the Tire Sealantand Compressor Kit . . . . . . . . . 272
Tire Pressure . . . . . . . . . . . . . . . . . 251
Vehicle Data Recording and
Privacy . . . . . . . . . . . . . . . . . . . . . . . . 320
Ventilation, Air . . . . . . . . . . . . . . . . . . 153
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Voltage Devices and Wiring . . . . 237
W
Warning Brake System Light . . . . . . . . . . . .113
Caution and Danger . . . . . . . . . . . . . 2
Lane Departure (LDW) . . . . . . . 204
Warning Lights, Gauges, and Indicators . . . . . . . . . . . . . . . . . . . . . 100
Warnings Hazard Flashers . . . . . . . . . . . . . . 145
Washer Fluid . . . . . . . . . . . . . . . . . . . 228
Messages . . . . . . . . . . . . . . . . . . . . 133
Wheels Alignment and Tire Balance . . 262
Different Size . . . . . . . . . . . . . . . . . 260
Replacement . . . . . . . . . . . . . . . . . 262 When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Where to Put the Restraint . . . . . . 78
Wi-Fi . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
Windows . . . . . . . . . . . . . . . . . . . . . . . . 42 Messages . . . . . . . . . . . . . . . . . . . . 133
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Windshield Wiper/Washer . . . . . . . . . . . . . . . . . . 97
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . 161
Winter Tires . . . . . . . . . . . . . . . . . . . . 244
Wiper Blade Replacement . . . . . . 233
Wiring, High Voltage Devices . . . 237