warning BUICK LUCERNE 2007 Repair Manual

Brakes
Brake Fluid
Your brake master
cylinder reservoir is
lled with DOT-3 brake
uid. SeeEngine
Compartment Overview
on page 334for the
location of the reservoir.
There are only two reasons why the brake uid
level in the reservoir might go down. The rst
is that the brake uid goes down to an acceptable
level during normal brake lining wear. When
new linings are put in, the uid level goes back
up. The other reason is that uid is leaking out of
the brake system. If it is, you should have your
brake system xed, since a leak means that
sooner or later your brakes will not work well, or
will not work at all.So, it is not a good idea to top off your brake uid.
Adding brake uid will not correct a leak. If you
add uid when your linings are worn, then you will
have too much uid when you get new brake
linings. You should add or remove brake uid, as
necessary, only when work is done on the
brake hydraulic system.
{CAUTION:
If your vehicle has too much brake uid, it
can spill on the engine. The uid will burn
if the engine is hot enough. You or others
could be burned, and your vehicle could
be damaged. Add brake uid only when
work is done on the brake hydraulic
system.
When your brake uid falls to a low level, your
brake warning light will come on. SeeBrake
System Warning Light on page 201.
367

Brake Wear
Your vehicle has four-wheel disc brakes.
Disc brake pads have built-in wear indicators that
make a high-pitched warning sound when the
brake pads are worn and new pads are needed.
The sound may come and go or be heard all
the time your vehicle is moving, except when you
are pushing on the brake pedal rmly.
{CAUTION:
The brake wear warning sound means that
soon the brakes will not work well. That
could lead to an accident. When you hear
the brake wear warning sound, have your
vehicle serviced.Notice:Continuing to drive with worn-out
brake pads could result in costly brake repair.
Some driving conditions or climates may cause
a brake squeal when the brakes are rst applied or
lightly applied. This does not mean something is
wrong with your brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated,
inspect brake pads for wear and evenly tighten
wheel nuts in the proper sequence to GM torque
specications.
Brake linings should always be replaced as
complete axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not return
to normal height, or if there is a rapid increase in
pedal travel. This could be a sign of brake trouble.
Brake Adjustment
Every time you apply the brakes, with or without
the vehicle moving, your brakes adjust for wear.
369

Replacing Brake System Parts
The braking system on a vehicle is complex. Its
many parts have to be of top quality and work well
together if the vehicle is to have really good
braking. Your vehicle was designed and tested
with top-quality GM brake parts. When you replace
parts of your braking system — for example,
when your brake linings wear down and you need
new ones put in — be sure you get new
approved GM replacement parts. If you do not,
your brakes may no longer work properly.
For example, if someone puts in brake linings that
are wrong for your vehicle, the balance between
your front and rear brakes can change — for
the worse. The braking performance you have
come to expect can change in many other ways
if someone puts in the wrong replacement
brake parts.
Battery
Your vehicle has a maintenance free battery.
When it is time for a new battery, get one that has
the replacement number shown on the original
battery’s label. We recommend an ACDelco
®
replacement battery.
Warning:Battery posts, terminals, and related
accessories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harm. Wash
hands after handling.
The battery is located under the rear seat cushion.
To access the battery, see “Removing the Rear
Seat Cushion” underRear Underseat Fuse
Block on page 431. You do not need to access
the battery to jump start your vehicle. See
Jump Starting on page 372.
370

The TPMS is designed to alert the driver, if a low
tire pressure condition exists. If your vehicle
has the Driver Information Center (DIC), the driver
may also check tire pressure levels using the
DIC buttons located on the instrument panel.
When a low tire pressure condition is detected,
the TPMS will illuminate the low tire pressure
warning symbol, located on the instrument panel
cluster, and at the same time a message to check
the pressure in a specic tire will also appear on
the DIC display. The low tire pressure warning
symbol on the instrument panel cluster and
the CHECK TIRE PRESSURE warning message
on the DIC display will appear at each ignition
cycle until the tires are inated to the correct
ination pressure. For additional information and
details about the DIC operation and displays
seeDIC Controls and Displays on page 212and
DIC Warnings and Messages on page 221.
You may notice, during cooler weather conditions,
that the tire pressure monitor light, located on
the instrument panel cluster, and the CHECK TIRE
PRESSURE message will appear when the
vehicle is rst started and the turn off as you startto drive the vehicle. This could be an early
indicator that the tire pressures are getting low
and need to be inated to the proper pressure.
Each tire, including the spare (if provided), should
be checked monthly when cold and inated to
the ination pressure recommended by the vehicle
manufacturer on the vehicle placard or tire
ination pressure label. (If your vehicle has tires of
a different size than the size indicated on the
vehicle placard or tire ination pressure label, you
should determine the proper tire ination
pressure for those tires.)
As an added safety
feature, your vehicle
has been equipped with
a tire pressure
monitoring system
(TPMS) that illuminates
a low tire pressure
telltale when one
or more of your tires is
signicantly
under-inated.
394

While the tires available on General Motors
passenger cars and light trucks may vary with
respect to these grades, they must also conform to
federal safety requirements and additional General
Motors Tire Performance Criteria (TPC) standards.
Treadwear
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specied
government test course. For example, a tire
graded 150 would wear one and a half (1.5) times
as well on the government course as a tire
graded 100. The relative performance of tires
depends upon the actual conditions of their use,
however, and may depart signicantly from
the norm due to variations in driving habits, service
practices, and differences in road characteristics
and climate.
Traction – AA, A, B, C
The traction grades, from highest to lowest, are AA,
A, B, and C. Those grades represent the tire’s
ability to stop on wet pavement as measured under
controlled conditions on specied government test
surfaces of asphalt and concrete. A tire marked C
may have poor traction performance.Warning:The traction grade assigned to this tire
is based on straight-ahead braking traction
tests, and does not include acceleration, cornering,
hydroplaning, or peak traction characteristics.
Temperature – A, B, C
The temperature grades are A (the highest), B,
and C, representing the tire’s resistance to
the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a
specied indoor laboratory test wheel. Sustained
high temperature can cause the material of the tire
to degenerate and reduce tire life, and excessive
temperature can lead to sudden tire failure.
The grade C corresponds to a level of performance
which all passenger car tires must meet under
the Federal Motor Vehicle Safety Standard
No. 109. Grades B and A represent higher levels
of performance on the laboratory test wheel
than the minimum required by law.
Warning:The temperature grade for this tire is
established for a tire that is properly inated
and not overloaded. Excessive speed,
under-ination, or excessive loading, either
separately or in combination, can cause heat
buildup and possible tire failure.
403

Changing a Flat Tire
If a tire goes at, avoid further tire and wheel
damage by driving slowly to a level place. Turn on
your vehicle’s hazard warning ashers. See
Hazard Warning Flashers on page 160for more
information.
{CAUTION:
Changing a tire can be dangerous. The
vehicle can slip off the jack and roll over
or fall on you or other people. You and
they could be badly injured or even killed.
Find a level place to change your tire. To
help prevent the vehicle from moving:
1. Set the parking brake rmly.
2. Put the shift lever in PARK (P).
3. Turn off the engine and do not restart
while the vehicle is raised.
4. Do not allow passengers to remain in
the vehicle.
CAUTION: (Continued)
CAUTION: (Continued)
To be even more certain the vehicle will
not move, you should put blocks at the
front and rear of the tire farthest away from
the one being changed. That would be the
tire, on the other side, at the opposite end
of the vehicle.
When your vehicle has a at tire, use the following
example as a guide to assist you in the placement
of wheel blocks.
The following information will tell you next how to
use the jack and change a tire.
408

A
Accessories and Modications..................... 325
Accessory Power Outlet(s).......................... 181
Additives, Fuel............................................ 328
Add-On Electrical Equipment....................... 428
Air Cleaner/Filter, Engine............................. 342
Air Conditioning..................................182, 186
Airbag
Passenger Status Indicator....................... 198
Readiness Light....................................... 197
Airbag Sensing and
Diagnostic Module (SDM)......................... 471
Airbag System............................................... 70
Adding Equipment to Your
Airbag-Equipped Vehicle......................... 87
How Does an Airbag Restrain?.................. 79
Passenger Sensing System....................... 81
Servicing Your Airbag-Equipped Vehicle..... 86
What Makes an Airbag Inate?.................. 78
What Will You See After an
Airbag Inates?...................................... 79
When Should an Airbag Inate?................. 76
Where Are the Airbags?............................. 72
Anti-Lock Brake System (ABS).................... 281
Anti-Lock Brake, System Warning Light....... 202Appearance Care
Aluminum or Chrome-Plated Wheels........ 424
Care of Safety Belts................................ 422
Chemical Paint Spotting........................... 425
Cleaning Exterior Lamps/Lenses.............. 422
Cleaning the Inside of Your Vehicle.......... 418
Fabric/Carpet........................................... 420
Finish Care.............................................. 423
Finish Damage......................................... 425
Instrument Panel, Vinyl, and
Other Plastic Surfaces.......................... 421
Leather.................................................... 421
Sheet Metal Damage............................... 425
Tires........................................................ 424
Underbody Maintenance........................... 425
Vehicle Care/Appearance Materials.......... 426
Washing Your Vehicle .............................. 422
Weatherstrips........................................... 422
Windshield and Wiper Blades................... 423
Ashtray(s).................................................... 182
Audio System(s).......................................... 241
Audio Steering Wheel Controls................. 271
Backglass Antenna................................... 274
Care of Your CD Player........................... 274
Care of Your CDs.................................... 273
481

Audio System(s) (cont.)
Navigation/Radio System,
see Navigation Manual......................... 271
Radio with CD................................245, 251
Setting the Time..............................242, 243
Theft-Deterrent Feature............................ 271
Understanding Radio Reception............... 272
XM™ Satellite Radio Antenna System...... 274
Automatic Transaxle
Fluid........................................................ 343
Operation................................................. 119
B
Backglass Antenna...................................... 274
Battery........................................................ 370
Electric Power Management..................... 176
Exterior Lighting Battery Saver................. 173
Inadvertent Power Saver.......................... 177
Run-Down Protection............................... 177Before Leaving on a Long Trip.................... 298
Brake
Anti-Lock Brake System (ABS)................. 281
Emergencies............................................ 283
Panic Assist............................................. 285
Parking.................................................... 122
System Warning Light.............................. 201
Brakes........................................................ 367
Braking....................................................... 280
Braking in Emergencies............................... 283
Break-In, New Vehicle................................. 113
Bulb Replacement....................................... 380
Halogen Bulbs......................................... 380
Headlamp Aiming..................................... 377
License Plate Lamps................................ 383
Replacement Bulbs.................................. 383
Taillamps and Back-Up Lamps................. 382
Taillamps, Turn Signal, Stoplamps and
Sidemarker Lamps................................ 380
Buying New Tires........................................ 400
482

C
Calibration.......................... 19,130, 132, 218
California Fuel............................................. 328
California Proposition 65 Warning................ 326
Canadian Owners........................................... 3
Capacities and Specications...................... 436
Carbon Monoxide..............106, 127, 302, 315
Care of
Safety Belts............................................. 422
Your CD Player........................................ 274
Your CDs ................................................. 273
CD, MP3 ..................................................... 262
Center Console Storage Area...................... 151
Center Flex Storage Unit............................. 152
Center Front Passenger Position,
Safety Belts............................................... 35
Center Seat.................................................. 18
Chains, Tire................................................. 406
Charging System Light................................ 200
Check
Engine Light............................................ 206
Checking Things Under the Hood................ 332
Chemical Paint Spotting.............................. 425Child Restraints
Child Restraint Systems............................. 49
Infants and Young Children........................ 46
Lower Anchors and Tethers for Children..... 55
Older Children........................................... 43
Securing a Child Restraint in a
Rear Seat Position................................. 62
Securing a Child Restraint in the
Center Front Seat Position..................... 65
Securing a Child Restraint in the
Right Front Seat Position........................ 65
Where to Put the Restraint........................ 53
Cigarette Lighter.......................................... 182
Cleaning
Aluminum or Chrome-Plated Wheels........ 424
Exterior Lamps/Lenses............................. 422
Fabric/Carpet........................................... 420
Finish Care.............................................. 423
Inside of Your Vehicle .............................. 418
Instrument Panel, Vinyl, and
Other Plastic Surfaces.......................... 421
Leather.................................................... 421
Tires........................................................ 424
Underbody Maintenance........................... 425
483

Cleaning (cont.)
Washing Your Vehicle.............................. 422
Weatherstrips........................................... 422
Windshield and Wiper Blades................... 423
Climate Control System............................... 182
Air Filter, Passenger Compartment........... 192
Dual Automatic......................................... 186
Outlet Adjustment..................................... 192
Collision Damage Repair............................. 472
Comfort Guides, Rear Safety Belt................. 39
Compact Spare Tire.................................... 418
Compass............................ 19,130, 132, 218
Content Theft-Deterrent............................... 110
Control of a Vehicle..................................... 280
Convenience Net......................................... 152
Coolant
Engine Temperature Gage........................ 204
Engine Temperature Warning Light........... 204
Heater, Engine......................................... 117
Cooled Seats................................................ 12
Cooling System..................................354, 360
Cornering Lamps......................................... 173
Courtesy Lamps.......................................... 174
Cruise Control............................................. 167
Cruise Control Light.................................... 210
Cupholder(s)................................................ 151Customer Assistance Information
Courtesy Transportation........................... 469
Customer Assistance for
Text Telephone (TTY) Users................. 464
Customer Assistance Offices.................... 464
Customer Satisfaction Procedure.............. 460
GM Mobility Reimbursement Program...... 465
Reporting Safety Defects to
General Motors..................................... 478
Reporting Safety Defects to the
Canadian Government.......................... 477
Reporting Safety Defects to the
United States Government.................... 477
Roadside Assistance Program.................. 466
Service Publications Ordering
Information........................................... 478
D
Daytime Running Lamps............................. 172
Delayed Entry Lighting................................ 174
Delayed Exit Lighting................................... 175
DIC Compass.............................................. 218
Disc, MP3................................................... 262
Doing Your Own Service Work.................... 326
484