wiring BUICK REGAL 2016 Owner's Manual

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
74 Seats and Restraints
{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,
the airbag sensing and diagnostic
module, steering wheel, instrument
panel, any of the airbag modules,ceiling or pillar garnish trim, 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 069.
If the vehicle has rollover roof-rail
airbags, see Different Size Tires
and Wheels 0270 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
reason, call Customer Assistance.
See Customer Assistance
Offices 0324.Airbag System Check
The airbag system does not need
regularly scheduled maintenance or
replacement. Make sure the airbag
readiness light is working. See
Airbag Readiness Light 0114.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
114 Instruments and Controls
If the driver safety belt is buckled,
neither the light nor the chime
comes on.
Passenger Safety Belt
Reminder Light
There is a passenger safety belt
reminder light near the passenger
airbag status indicator. See
Passenger Sensing System069.
When the vehicle is started, this
light flashes and a chime may come
on to remind passengers to fasten
their safety belt. Then the light stays
on solid until the belt is buckled.
This cycle continues several times if
the passenger remains or becomes
unbuckled while the vehicle is
moving.
If the passenger safety belt is
buckled, neither the chime nor the
light comes on. The front passenger safety belt
reminder light and chime may turn
on if an object is put on the seat
such as a briefcase, handbag,
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, see
Airbag
System 064.
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 069 for important
safety information. The instrument
panel has a passenger airbag status
indicator.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Vehicle Care 219
Vehicle Care
General Information
General Information . . . . . . . . . . 220
California Proposition65 Warning . . . . . . . . . . . . . . . . . 220
California Perchlorate Materials Requirements . . . . . 220
Accessories and Modifications . . . . . . . . . . . . . . . . 221
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 221
Hood . . . . . . . . . . . . . . . . . . . . . . . . . 222
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 223
Engine Oil . . . . . . . . . . . . . . . . . . . . 228
Engine Oil Life System . . . . . . . 230
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 231
Engine Air Cleaner/Filter . . . . . . 231
Cooling System . . . . . . . . . . . . . . 233
Engine Coolant . . . . . . . . . . . . . . . 235
Engine Overheating . . . . . . . . . . 237
Washer Fluid . . . . . . . . . . . . . . . . . 239
Brakes . . . . . . . . . . . . . . . . . . . . . . . 239
Brake Fluid . . . . . . . . . . . . . . . . . . . 240
Battery - North America . . . . . . 241
All-Wheel Drive . . . . . . . . . . . . . . . 242 Starter Switch Check . . . . . . . . . 243
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 243
Ignition Transmission Lock
Check . . . . . . . . . . . . . . . . . . . . . . . 243
Park Brake and P (Park) Mechanism Check . . . . . . . . . . 243
Wiper Blade Replacement . . . . 244
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 245
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 245
Halogen Bulbs . . . . . . . . . . . . . . . . 245
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . . . . . . . 245
Headlamps, Front Turn Signal and Parking Lamps . . . . . . . . . 246
Fog Lamps . . . . . . . . . . . . . . . . . . . 246
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 246
License Plate Lamp . . . . . . . . . . 247
Replacement Bulbs . . . . . . . . . . . 248
Electrical System
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . 248
Electrical System Overload . . . 248
Fuses and Circuit Breakers . . . 249 Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 249
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 252
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 253
All-Season Tires . . . . . . . . . . . . . . 254
Winter Tires . . . . . . . . . . . . . . . . . . 254
Summer Tires . . . . . . . . . . . . . . . . 255
Tire Sidewall Labeling . . . . . . . . 255
Tire Designations . . . . . . . . . . . . . 257
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . . . 258
Tire Pressure . . . . . . . . . . . . . . . . . 261
Tire Pressure for High-Speed Operation . . . . . . . . . . . . . . . . . . . 262
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . . . . 262
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . . . 264
Tire Inspection . . . . . . . . . . . . . . . . 267
Tire Rotation . . . . . . . . . . . . . . . . . 267
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . 268
Buying New Tires . . . . . . . . . . . . . 269
Different Size Tires and Wheels . . . . . . . . . . . . . . . . . . . . . . 270
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 270

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Vehicle Care 247
4. Remove the three nuts thatsecure 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).
5. Push the replacement bulb straight 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.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
248 Vehicle Care
Replacement Bulbs
Exterior LampBulb
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.
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.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Vehicle Care 249
Headlamp Wiring
An electrical overload may cause
the lamps to go on and off, or in
some cases to remain off. Have the
headlamp 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, seeEngine
Compartment Fuse Block 0249 and
Instrument Panel Fuse Block 0252.
Engine Compartment
Fuse Block
To remove the fuse block cover,
press the three retaining clips on the
cover and lift it straight up.
Caution
Spilling liquid on any electrical
component on the vehicle may
damage it. Always keep the
covers on any electrical
component.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
350 Index
FusesEngine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 249
Fuses and Circuit Breakers . . . 249
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 252
G
Garage Door Opener . . . . . . . . . . . 146Programming . . . . . . . . . . . . . . . . . 146
Gauges Engine Coolant
Temperature . . . . . . . . . . . . . . . . .112
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Odometer . . . . . . . . . . . . . . . . . . . . . .110
Speedometer . . . . . . . . . . . . . . . . . .110
Tachometer . . . . . . . . . . . . . . . . . . . . 111
Trip Odometer . . . . . . . . . . . . . . . . . 111
Warning Lights and Indicators . . . . . . . . . . . . . . . . . . . 103
General Information
Service and Maintenance . . . . . 304
Towing . . . . . . . . . . . . . . . . . . . . . . . . 218
Vehicle Care . . . . . . . . . . . . . . . . . . 220
Glove Box . . . . . . . . . . . . . . . . . . . . . . . 95
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . 325
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . 245
Hazard Warning Flashers . . . . . . . 152
Head Restraints . . . . . . . . . . . . . . . . . 50
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . 245
Automatic . . . . . . . . . . . . . . . . . . . . . 151
Bulb Replacement . . . . . . . . . . . . 245
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . 151
Flash-to-Pass . . . . . . . . . . . . . . . . . 151
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . 245
High-Beam On Light . . . . . . . . . . 122
High/Low Beam Changer . . . . . 150
Lamps On Reminder . . . . . . . . . 123
Heated Steering Wheel . . . . . . . . . . . . . . . . . 99
Heated Front Seats . . . . . . . . . . . . . . 55
Heated Mirrors . . . . . . . . . . . . . . . . . . . 44
Heater
Engine . . . . . . . . . . . . . . . . . . . . . . . . 181
High Voltage Devices and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . 248
High-Beam On Light . . . . . . . . . . . . 122
High-Speed Operation . . . . . . . . . . 262
Hill and Mountain Roads . . . . . . . . 169
Hill Start Assist (HSA) . . . . . . . . . . 191 Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
How to Wear Safety Belts
Properly . . . . . . . . . . . . . . . . . . . . . . . . 59
I
Ignition Positions . . . . . . . . . . 175, 177
Ignition Transmission LockCheck . . . . . . . . . . . . . . . . . . . . . . . . . 243
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 42
Indicator Vehicle Ahead . . . . . . . . . . . . . . . . .119
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . 77
Information Energy . . . . . . . . . . . . . . . . . . . . . . . 125
Infotainment . . . . . . . . . . . . . . . . . . . . 156
Infotainment System . . . . . . . . . . . . 335
Instrument Cluster . . . . . . . . . 104, 108
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . . . 95
Interior Rearview Mirrors . . . . . . . . . 44
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . . . . . . . . . . . . . . . 288, 289

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
356 Index
Turn SignalBulb Replacement . . . . . . . . . . . . 246
U
Uniform Tire Quality Grading . . . 270
Universal Remote System . . . . . . 146Operation . . . . . . . . . . . . . . . . . . . . . 148
Programming . . . . . . . . . . . . . . . . . 146
Using This Manual . . . . . . . . . . . . . . . . 2
V
Vehicle Alarm System . . . . . . . . . . . . . . . . . . 40
Canadian Owners . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . 165
Identification Number (VIN) . . . 318
Load Limits . . . . . . . . . . . . . . . . . . . 171
Messages . . . . . . . . . . . . . . . . . . . . 131
Personalization . . . . . . . . . . . . . . . 140
Remote Start . . . . . . . . . . . . . . . . . . . 34
Security . . . . . . . . . . . . . . . . . . . . . . . . 40
Towing . . . . . . . . . . . . . . . . . . . . . . . . 292
Vehicle Ahead Indicator . . . . . . . . 119
Vehicle Care Storing the Tire Sealantand Compressor Kit . . . . . . . . . 281
Tire Pressure . . . . . . . . . . . . . . . . . 261
Vehicle Data Recording and Privacy . . . . . . . . . . . . . . . . . . . . . . . . 333 Ventilation, Air . . . . . . . . . . . . . . . . . . 161
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Voltage Devices and Wiring . . . . 248
W
Warning
Brake System Light . . . . . . . . . . . .117
Caution and Danger . . . . . . . . . . . . . 3
Lane Departure (LDW) . . . . . . . 212
Warning Lights, Gauges, and Indicators . . . . . . . . . . . . . . . . . . . . . 103
Warnings
Hazard Flashers . . . . . . . . . . . . . . 152
Washer Fluid . . . . . . . . . . . . . . . . . . . 239 Messages . . . . . . . . . . . . . . . . . . . . 140
Wheels Alignment and Tire Balance . . 272
Different Size . . . . . . . . . . . . . . . . . 270
Replacement . . . . . . . . . . . . . . . . . 272
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 268
Where to Put the Restraint . . . . . . 81
Windows . . . . . . . . . . . . . . . . . . . . . . . . 45 Messages . . . . . . . . . . . . . . . . . . . . 140
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Windshield
Wiper/Washer . . . . . . . . . . . . . . . . 100
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . 169 Winter Tires . . . . . . . . . . . . . . . . . . . . 254
Wiper Blade Replacement . . . . . . 244
Wiring, High Voltage Devices . . . 248