
Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Vehicle Care 235
Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL®engine
coolant. This coolant is designed to
remain in the vehicle for 5 years or
240 000 km (150,000 mi), whichever
occurs first.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating,
see Engine Overheating 0237.
What to Use
{Warning
Adding only plain water or some
other liquid to the cooling system
can be dangerous. Plain water
and other liquids, can boil before
the proper coolant mixture will.
The coolant warning system is set
for the proper coolant mixture.
With plain water or the wrong
mixture, the engine could get too
hot but you would not get the
(Continued)
Warning (Continued)
overheat warning. The engine
could catch fire and you or
others could be burned. Use a
50/50 mixture of clean, drinkable
water and DEX-COOL coolant.
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. If using this mixture,
nothing else needs to be added.
This mixture:
. Gives freezing protection down
to−37 °C (−34 °F), outside
temperature.
. Gives boiling protection up to
129 °C (265 °F), engine
temperature.
. Protects against rust and
corrosion.
. Will not damage aluminum parts.
. Helps keep the proper engine
temperature.
Caution
If improper coolant mixture,
inhibitors, or additives are used in
the vehicle cooling system, the
engine could overheat and be
damaged. Too much water in the
mixture can freeze and crack
engine cooling parts. The repairs
would not be covered by the
vehicle warranty. Use only the
proper mixture of engine coolant
for the cooling system. See
Recommended Fluids and
Lubricants 0315.
Never dispose of engine coolant by
putting it in the trash, pouring it on
the ground, or into sewers, streams,
or bodies of water. Have the coolant
changed by an authorized service
center, familiar with legal
requirements regarding used
coolant disposal. This will help
protect the environment and your
health.

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Index 349
E
Electric Parking Brake Light . . . . 118
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 218
Electrical System
Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 249
Fuses and Circuit Breakers . . . 249
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 252
Overload . . . . . . . . . . . . . . . . . . . . . 248
Emergency OnStar
®. . . . . . . . . . . . . . . . . . . . . . 337
Energy Information . . . . . . . . . . . . . 125
Engine
Air Cleaner/Filter . . . . . . . . . . . . . 231
Check and Service EngineSoon Light . . . . . . . . . . . . . . . . . . .116
Compartment Overview . . . . . . . 223
Coolant . . . . . . . . . . . . . . . . . . . . . . . 235
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . .112
Coolant Temperature Warning Light . . . . . . . . . . . . . . . 121
Cooling System . . . . . . . . . . . . . . . 233
Cooling System Messages . . . 133
Drive Belt Routing . . . . . . . . . . . . 321
Exhaust . . . . . . . . . . . . . . . . . . . . . . 185 Engine (cont'd)
Heater . . . . . . . . . . . . . . . . . . . . . . . . 181
Oil Life System . . . . . . . . . . . . . . . 230
Oil Messages . . . . . . . . . . . . . . . . . 134
Oil Pressure Light . . . . . . . . . . . . 121
Overheating . . . . . . . . . . . . . . . . . . 237
Power Messages . . . . . . . . . . . . . 134
Running While Parked . . . . . . . . 185
Starting . . . . . . . . . . . . . . . . . . . . . . . 178
Entry Lighting . . . . . . . . . . . . . . . . . . . 154
Event Data Recorders . . . . . . . . . . 334
Exit Lighting . . . . . . . . . . . . . . . . . . . . 154
Extender, Safety Belt . . . . . . . . . . . . 62
Exterior Lamp Controls . . . . . . . . . 150
Exterior Lamps Off Reminder . . . 150
F
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . 11
Filter, Engine Air Cleaner . . . . . . . . . . . 231
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 151
Flashers, Hazard Warning . . . . . . 152
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 273 Changing . . . . . . . . . . . . . . . . . . . . . 282
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 302
Fluid Automatic Transmission . . . . . . 231
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 240 Fluid (cont'd)
Washer . . . . . . . . . . . . . . . . . . . . . . . 239
Fog Lamps Bulb Replacement . . . . . . . 153, 246
Folding Mirrors . . . . . . . . . . . . . . . . . . 44
Forward Collision Alert (FCA) System . . . . . . . . . . . . . . . . . 207
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . 332
Front Automatic Braking (FAB) System . . . . . . . . . . . . . . . . . 209
Front Fog Lamp Light . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Front Seats
Adjustment . . . . . . . . . . . . . . . . . . . . . 51
Heated . . . . . . . . . . . . . . . . . . . . . . . . . 55
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 Additives . . . . . . . . . . . . . . . . . . . . . 215
Economy Driving . . . . . . . . . . . . . . . 24
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . 217
Filling the Tank . . . . . . . . . . . . . . . 215
Foreign Countries . . . . . . . . . . . . 215
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . 111
Low Fuel Warning Light . . . . . . . 122
Requirements, California . . . . . 215
System Messages . . . . . . . . . . . . 134

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Index 351
K
Key and Lock Messages . . . . . . . . 135
Keyless EntryRemote (RKE) System . . . . . . . . . 28
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
L
Labeling, Tire Sidewall . . . . . . . . . . 255
Lamps
Daytime Running (DRL) . . . . . . 151
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 154
Exterior Controls . . . . . . . . . . . . . . 150
Exterior Lamps OffReminder . . . . . . . . . . . . . . . . . . . 150
Headlamps, Front Turn
Signal, and Parking
Lamps . . . . . . . . . . . . . . . . . . . . . . 246
License Plate . . . . . . . . . . . . . . . . . 247
Malfunction Indicator . . . . . . . . . .116
On Reminder . . . . . . . . . . . . . . . . . 123
Reading . . . . . . . . . . . . . . . . . . . . . . 154
Lane Change Alert (LCA) . . . . . . . 210
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . . 212
Lane Departure Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Lap-Shoulder Belt . . . . . . . . . . . . . . . 60 LATCH System
Replacing Parts after a
Crash . . . . . . . . . . . . . . . . . . . . . . . . . 89
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . 82
Lighter, Cigarette . . . . . . . . . . . . . . . 103
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . 154
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Illumination Control . . . . . . . . . . . 153
Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Airbag Readiness . . . . . . . . . . . . . .114
Antilock Brake System(ABS) Warning . . . . . . . . . . . . . . .119
Brake System Warning . . . . . . . .117
Charging System . . . . . . . . . . . . . .115
Cruise Control . . . . . . . . . . . . . . . . 123
Door Ajar . . . . . . . . . . . . . . . . . . . . . 123
Electric Parking Brake . . . . . . . . .118
Engine Coolant Temperature Warning . . . . . . . 121
Engine Oil Pressure . . . . . . . . . . 121
Flash-to-Pass . . . . . . . . . . . . . . . . . 151
Front Fog Lamp . . . . . . . . . . . . . . 123
High-Beam On . . . . . . . . . . . . . . . . 122
High/Low Beam Changer . . . . . 150
Lane Departure Warning . . . . . . .119
Low Fuel Warning . . . . . . . . . . . . 122 Lights (cont'd)
Safety Belt Reminders . . . . . . . . .113
Security . . . . . . . . . . . . . . . . . . . . . . 122
Service Electric Parking
Brake . . . . . . . . . . . . . . . . . . . . . . . .118
StabiliTrak
®OFF . . . . . . . . . . . . . 120
Tire Pressure . . . . . . . . . . . . . . . . . 121
Traction Control System (TCS)/StabiliTrak
®. . . . . . . . . . 120
Traction Off . . . . . . . . . . . . . . . . . . . 120
Locks Automatic Door . . . . . . . . . . . . . . . . . 37
Delayed Locking . . . . . . . . . . . . . . . . 37
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Lockout Protection . . . . . . . . . . . . . . 37
Power Door . . . . . . . . . . . . . . . . . . . . . 36
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Loss of Control . . . . . . . . . . . . . . . . . 167
Low Fuel Warning Light . . . . . . . . . 122
Lower Anchors and Tethers
for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . . . . . 82
Lumbar Adjustment . . . . . . . . . . . . . . 52
Front Seats . . . . . . . . . . . . . . . . . . . . . 52