Page 48 of 357

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Keys, Doors, and Windows 47
Roof
Sunroof
If equipped, the sunroof only
operates when the ignition is in ON/
RUN or ACC/ACCESSORY or in
Retained Accessory Power (RAP).
SeeRetained Accessory Power
(RAP) 0183.
To open or close the sunroof, press
the switch (1) to the first detent
position.
To express-open or express-close
the sunroof with the safety function
enabled, press the open or close sunroof switch (1) to the second
detent position and release. To stop
the movement, press the switch
again.
To automatically tilt or close the
sunroof, press the tilt open or close
sunroof switch (2).
If an object is in the path of the
sunroof while it is closing, the
automatic reversal feature will
detect the object and stop the
sunroof. The sunroof will then return
to the full-open or vent position.
The sunroof glass panel cannot be
opened or closed if the vehicle has
an electrical failure.
Initializing
After a power failure, the sunroof
operation may be limited. Have the
system initialized by a dealer
technician.
Automatic Reversal System
The sunroof is equipped with an
automatic reversal system that is
only active when the sunroof is
being operated in express mode.
If an object is in the path of thesunroof while it is express closing,
the reversal system will detect the
object and stop. In the event of
closing difficulties like frost or other
conditions, it is possible to override
the reversal system. To override the
reversal system, close in manual
mode. To stop the movement,
release the switch.
Dirt and debris may collect on the
sunroof seal or in the track. This
could cause an issue with sunroof
operation or noise. It could also plug
the water drainage system.
Periodically open the sunroof and
remove any obstacles or loose
debris. Wipe the sunroof seal and
roof sealing area using a clean
cloth, mild soap, and water. Do not
remove grease from the sunroof.
Page 308 of 357

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Service and Maintenance 307
.Visually inspect steering,
suspension, and chassis
components for damaged, loose,
or missing parts or signs of
wear. See Exterior Care 0295.
. Check restraint system
components. See Safety System
Check 063.
. Visually inspect fuel system for
damage or leaks.
. Visually inspect exhaust system
and nearby heat shields for
loose or damaged parts.
. Lubricate body components. See
Exterior Care 0295. .
Check starter switch. See Starter
Switch Check 0243.
. Check automatic transmission
shift lock control function. See
Automatic Transmission Shift
Lock Control Function
Check 0243.
. Check ignition transmission lock.
See Ignition Transmission Lock
Check 0243.
. Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism
Check 0243. .
Check accelerator pedal for
damage, high effort, or binding.
Replace if needed.
. Visually inspect gas strut for
signs of wear, cracks, or other
damage. Check the hold open
ability of the strut. See your
dealer if service is required.
. Check tire sealant expiration
date, if equipped. See Tire
Sealant and Compressor
Kit 0275.
. Inspect sunroof track and seal,
if equipped. See Sunroof047.
Page 356 of 357

Buick Regal Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9159380) - 2016 - CRC - 2/23/16
Index 355
Storage AreasCenter Console . . . . . . . . . . . . . . . . . 96
Convenience Net . . . . . . . . . . . . . . . 97
Glove Box . . . . . . . . . . . . . . . . . . . . . . 95
Instrument Panel . . . . . . . . . . . . . . . 95
Storage Compartments . . . . . . . . . . 95
Storing the Tire Sealant and Compressor Kit . . . . . . . . . . . . . . . 281
Stuck Vehicle . . . . . . . . . . . . . . . . . . . 170
Summer Tires . . . . . . . . . . . . . . . . . . 255
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . 46
Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System Forward CollisionAlert (FCA) . . . . . . . . . . . . . . . . . . 207
Infotainment . . . . . . . . . . . . . 156, 335
Systems Driver Assistance . . . . . . . . . . . . . 204
T
Tachometer . . . . . . . . . . . . . . . . . . . . . 111
TaillampsBulb Replacement . . . . . . . . . . . . 246
Text Telephone (TTY) Users . . . . 324
Theft-Deterrent Systems . . . . . . . . . 42 Immobilizer . . . . . . . . . . . . . . . . . . . . . 42
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253 Tires (cont'd)
All-Season . . . . . . . . . . . . . . . . . . . . 254
Buying New Tires . . . . . . . . . . . . . 269
Chains . . . . . . . . . . . . . . . . . . . . . . . . 273
Changing . . . . . . . . . . . . . . . . . . . . . 282
Compact Spare . . . . . . . . . . . . . . . 287
Designations . . . . . . . . . . . . . . . . . 257
Different Size . . . . . . . . . . . . . . . . . 270
If a Tire Goes Flat . . . . . . . . . . . . 273
Inspection . . . . . . . . . . . . . . . . . . . . 267
Messages . . . . . . . . . . . . . . . . . . . . 139
Pressure . . . . . . . . . . . . . . . . . . . . . . 262
Pressure Light . . . . . . . . . . . . . . . . 121
Pressure Monitor Operation . . 264
Pressure Monitor System . . . . . 262
Rotation . . . . . . . . . . . . . . . . . . . . . . 267
Sealant and
Compressor Kit . . . . . . . . . . . . . 275
Sealant and Compressor Kit, Storing . . . . . . . . . . . . . . . . . . 281
Sidewall Labeling . . . . . . . . . . . . . 255
Terminology and Definitions . . 258
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . . . 270
Wheel Alignment and Tire Balance . . . . . . . . . . . . . . . . . . . . . 272
Wheel Replacement . . . . . . . . . . 272 Tires (cont'd)
When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . . . 268
Winter . . . . . . . . . . . . . . . . . . . . . . . . 254
Towing General Information . . . . . . . . . . 218
Recreational Vehicle . . . . . . . . . . 293
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 292
Track Events and
Competitive Driving . . . . . . . . . . . 168
Traction Control System (TCS)/StabiliTrak
®Light . . . . . . . . . . . . 120
Off Light . . . . . . . . . . . . . . . . . . . . . . 120
Selective Ride Control . . . . . . . . 193
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . . 192
Transmission
Automatic . . . . . . . . . . . . . . . . . . . . . 186
Fluid, Automatic . . . . . . . . . . . . . . 231
Messages . . . . . . . . . . . . . . . . . . . . 139
Transportation Program, Courtesy . . . . . . . . . . . . . . . . . . . . . . 328
Trip Odometer . . . . . . . . . . . . . . . . . . 111
Trunk . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . . 152