2007 GMC ACADIA brake light

Brakes
Brake Fluid
The brake master
cylinder reservoir is
lled with DOT-3 brake
uid. SeeEngine
Compartment Overview
on page 396for 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 the
brake system xed, since a leak means that
sooner or later the brakes will not work well.So, it is not a good idea to top off the brake uid.
Adding brake uid will not correct a leak. If you
add uid when the 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 the brake uid falls to a low level, the brake
warning light comes on. SeeBrake System
Warning Light on page 222.
421

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 can 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 can cause a
brake squeal when the brakes are rst applied
or lightly applied. This does not mean something
is wrong with the 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 torque
specications inCapacities and Specifications on
page 497.
Brake linings should always be replaced as
complete axle sets.Brake Pedal Travel
See your dealer/retailer 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
that brake service might be required.
Brake Adjustment
Every time you apply the brakes, with or without
the vehicle moving, the brakes adjust for wear.
423

Fuses Usage
LT PRK Left Parking Lamp
RT PRK Right Parking Lamp
TRLR PRK
LAMPTrailer Parking Lamps
AIRBAG Airbag System
PCM IGN Powertrain Control Module Ignition
AFS Adaptive Forward Lighting System
TRANS Transmission
REAR
CAMERARear Camera
EMISSION 1 Anti-lock Brakes System 2
TRLR BRK Trailer Brake
AWD All-Wheel-Drive System
TRLR PWR Trailer Power
EVEN COILS Even Injector Coils
RR HVAC Rear Climate Control System
SPARE Spare
ODD COILS Odd Injector Coils
SPARE Spare
LT HI BEAM Left High-Beam Headlamp
SPARE Spare
LT TRLR
STOP/TRNTrailer Left Stoplamp and Turn
Signal
EMISSION 2 Emission 2Fuses Usage
ECM Engine Control Module
RT HI BEAM Right High-Beam Headlamp
RVC SNSR Regulated Voltage Control Sensor
RT TRLR
STOP/TRNTrailer Right Stoplamp and Turn
Signal
ECM 1 Engine Control Module 1
SPARE Spare
WPR/WSW Windshield Wiper/Washer
SPARE Spare
PWR OUTLET Power Outlet
AUX POWER Auxiliary Power
RT LO BEAM Right Low-Beam Headlamp
RR APO Rear Accessory Power Outlet
LT LO BEAM Left Low-Beam Headlamp
TCM Transmission Control Module
TRLR BCK/UP Trailer Back-up Lamps
HTD MIR Heated Outside Rearview Mirror
ABS MTR Anti-lock Brake System Motor
FOG LAMP Fog Lamps
HORN Horn
A/C CLTCH Air Conditioning Clutch
FUEL PUMP Fuel Pump
SPARE Spare
495

Maintenance Footnotes
(a)Visually inspect brake lines and hoses for
proper hook-up, binding, leaks, cracks, chafing,
etc. Inspect disc brake pads for wear and rotors for
surface condition. Inspect other brake parts,
including calipers, parking brake, etc. Check
parking brake adjustment.
(b)Visually inspect front and rear suspension and
steering system for damaged, loose, or missing
parts or signs of wear. Inspect power steering lines
and hoses for proper hook-up, binding, leaks,
cracks, chafing, etc.
(c)Visually inspect hoses and have them replaced
if they are cracked, swollen, or deteriorated.
Inspect all pipes, fittings and clamps; replace with
genuine parts as needed. To help ensure
proper operation, a pressure test of the cooling
system and pressure cap and cleaning the outside
of the radiator and air conditioning condenser is
recommended at least once a year.(d)Inspect wiper blades for wear, cracking, or
contamination. Clean the windshield and
wiper blades, if contaminated. Replace wiper
blades that are worn or damaged. See Windshield
Wiper Blade Replacement on page 434and
Windshield, Backglass, and Wiper Blades on
page 484for more information.
(e)Make sure the safety belt reminder light and all
belts, buckles, latch plates, retractors, and
anchorages are working properly. Look for any
other loose or damaged safety belt system parts.
If you see anything that might keep a safety
belt system from doing its job, have it repaired.
Have any torn or frayed safety belts replaced. Also
look for any opened or broken airbag coverings,
and have them repaired or replaced. The airbag
system does not need regular maintenance.
(f)Lubricate all key lock cylinders, hood latch
assemblies, secondary latches, pivots, spring
anchor and release pawl, hood and door hinges,
rear folding seats, and liftgate hinges. More
frequent lubrication may be required when
exposed to a corrosive environment. Applying
silicone grease on weatherstrips with a clean cloth
will make them last longer, seal better, and not
stick or squeak.
506

A
Accessories and Modications..................... 385
Adding Equipment to Your
Airbag-Equipped Vehicle............................ 91
Additives, Fuel............................................ 389
Add-On Electrical Equipment....................... 489
Air Cleaner/Filter, Engine............................. 402
Air Conditioning..................................199, 203
Airbag
Passenger Status Indicator....................... 218
Readiness Light....................................... 217
Airbag System............................................... 76
What Will You See After an
Airbag Inates?...................................... 84
When Should an Airbag Inate?................. 81
Where Are the Airbags?............................. 79
Airbag Systems
Adding Equipment to Your
Airbag-Equipped Vehicle......................... 91
How Does an Airbag Restrain?.................. 83
Passenger Sensing System....................... 85
Servicing Your Airbag-Equipped Vehicle..... 90
What Makes an Airbag Inate?.................. 83All-Wheel Drive........................................... 430
All-Wheel-Drive (AWD) System.................... 339
Anti-Lock Brake System.............................. 335
Anti-Lock Brake, System Warning Light....... 223
Appearance Care
Aluminum or Chrome-Plated Wheels........ 484
Care of Safety Belts................................ 482
Chemical Paint Spotting........................... 486
Cleaning Exterior Lamps/Lenses.............. 483
Cleaning the Inside of Your Vehicle.......... 478
Fabric/Carpet........................................... 480
Finish Care.............................................. 483
Finish Damage......................................... 486
Instrument Panel, Vinyl, and
Other Plastic Surfaces.......................... 481
Leather.................................................... 481
Sheet Metal Damage............................... 486
Tires........................................................ 485
Underbody Maintenance........................... 486
Vehicle Care/Appearance Materials.......... 487
Washing Your Vehicle.............................. 482
Weatherstrips........................................... 482
Windshield, Backglass,
and Wiper Blades................................. 484
539

Audio System.............................................. 264
Audio Steering Wheel Controls................. 325
Care of Your CD and DVD Player............ 328
Care of Your CDs and DVDs................... 328
Navigation/Radio System,
see Navigation Manual......................... 311
Radio with CD......................................... 268
Rear Audio Controller (RAC).................... 324
Rear Seat Audio (RSA)............................ 322
Setting the Time...................................... 266
Theft-Deterrent Feature............................ 325
Understanding Radio Reception............... 326
Audio System(s)
Radio with CD and DVD.......................... 278
Automatic Transmission
Fluid........................................................ 404
Operation................................................. 129B
Battery........................................................ 424
Electric Power Management..................... 188
Run-Down Protection............................... 189
Before Leaving on a Long Trip.................... 352
Brake
Emergencies............................................ 336
Parking.................................................... 134
Brakes........................................................ 421
System Warning Light.............................. 222
Braking....................................................... 334
Braking in Emergencies............................... 336
Break-In, New Vehicle................................. 123
Bulb Replacement....................................... 432
Halogen Bulbs......................................... 432
Headlamp Aiming..................................... 431
High Intensity Discharge (HID) Lighting.... 432
License Plate Lamps................................ 433
Replacement Bulbs.................................. 433
Buying New Tires........................................ 450
540

I
Ignition Positions......................................... 124
Infants and Young Children, Restraints.......... 51
Ination - Tire Pressure............................... 442
Instrument Panel
Overview.................................................. 170
Storage Area............................................ 161
Instrument Panel (I/P)
Brightness................................................ 186
Cluster..................................................... 215
J
Jump Starting.............................................. 425
K
Keyless Entry System................................... 98
Keys............................................................. 97
L
Labeling, Tire Sidewall................................. 436
Lamps
Courtesy.................................................. 186
Reading................................................... 188
LATCH System
Child Restraints......................................... 61
License Plate Lamps................................... 433
Liftgate
Carbon Monoxide..................................... 109
Liftgate, Power............................................ 110
Light
Airbag Readiness..................................... 217
Anti-Lock Brake System Warning............. 223
Brake System Warning............................. 222
Charging System..................................... 220
Cruise Control.......................................... 230
Engine Coolant Temperature Warning....... 224
Fog Lamp................................................ 230
546