service BUICK TERRAZA 2007 Workshop Manual

If the system is limiting wheel spin when you
press the button, the TRACTION CONTROL
ACTIVE message will go off, but the system will
not turn off until there is no longer a current
need to limit wheel spin. The TRACTION
CONTROL OFF message will come on to remind
you the system is off. You can turn the system
back on at any time by pressing the button again.
The traction control system warning message
should go off.
Adding non-GM accessories can affect your
vehicle’s performance. SeeAccessories and
Modications on page 400for more information.
StabiliTrak®System
Your vehicle may be equipped with StabiliTrak®
which combines anti-lock brake, traction and
stability control systems and helps the driver
maintain directional control of the vehicle in most
driving conditions.
When you rst start your vehicle and begin to
drive away, the system performs several diagnostic
checks to insure there are no problems. You
may hear or feel the system working. This
is normal and does not mean there is a problem
with your vehicle.If the system fails to turn on or activate, the
SERVICE STABILITY SYSTEM message will be
displayed on the Driver Information Center (DIC). If
the vehicle has gone through heavy acceleration
or braking or multiple turns during the rst
two miles of driving after starting your vehicle, the
STABILITY CONTROL OFF message may
appear on the DIC. If this is the case, your vehicle
does not need servicing. You will need to turn
the vehicle off and then restart it to initialize
StabiliTrak
®. If either message appears on the
DIC, and your vehicle has not gone through hard
acceleration, braking or multiple turns in the
rst two miles of driving, your vehicle should be
taken in for service.
The STABILITY CONTROL ACTIVE message will
appear on the DIC only when the system is both
on and activated. It means that an advanced
computer-controlled system has come on to help
your vehicle continue to go in the direction in which
you are steering. StabiliTrak
®activates when the
computer senses that your vehicle is just starting to
spin, as it might if you hit a patch of ice or other
slippery spot on the road. When the system
activates, you may hear a noise or feel a vibration in
the brake pedal. This is normal.
355

The traction control system may activate on
dry or rough roads or under conditions such as
heavy acceleration while turning or abrupt
upshifts/downshifts of the transaxle. When
this happens you may notice a reduction in
acceleration, or may hear a noise or vibration.
This is normal.
If your vehicle is in cruise control when the system
activates, the STABILITY CONTROL ACTIVE
message will appear on the DIC and the cruise
control will automatically disengage. When
road conditions allow you to use cruise again, you
may re-engage the cruise control. SeeCruise
Control on page 177.
StabiliTrak
®may also turn off automatically if it
determines that a problem exists with the system.
If the problem does not clear itself after restarting
the vehicle, you should see your dealer for
service.
Steering
Power Steering
If you lose power steering assist because the
engine stops or the system is not functioning, you
can steer but it will take much more effort.
Steering Tips
It is important to take curves at a reasonable
speed.
A lot of the “driver lost control” accidents
mentioned on the news happen on curves.
Here is why:
Experienced driver or beginner, each of us is
subject to the same laws of physics when driving
on curves. The traction of the tires against the
road surface makes it possible for the vehicle to
change its path when you turn the front wheels. If
there is no traction, inertia will keep the vehicle
going in the same direction. If you have ever
tried to steer a vehicle on wet ice, you will
understand this.
357

When you want to leave the freeway, move to the
proper lane well in advance. If you miss your
exit, do not, under any circumstances, stop and
back up. Drive on to the next exit.
The exit ramp can be curved, sometimes quite
sharply. The exit speed is usually posted.
Reduce your speed according to your
speedometer, not to your sense of motion. After
driving for any distance at higher speeds, you may
tend to think you are going slower than you
actually are.
Before Leaving on a Long Trip
Make sure you are ready. Try to be well rested. If
you must start when you are not fresh — such
as after a day’s work — do not plan to make too
many miles that rst part of the journey. Wear
comfortable clothing and shoes you can easily
drive in.
Is your vehicle ready for a long trip? If you keep it
serviced and maintained, it is ready to go. If it
needs service, have it done before starting out.Of course, you will nd experienced and able
service experts in GM dealerships all across North
America. They will be ready and willing to help
if you need it.
Here are some things you can check before a trip:
Windshield Washer Fluid:Is the reservoir
full? Are all windows clean inside and outside?
Wiper Blades:Are they in good shape?
Fuel, Engine Oil, Other Fluids:Have you
checked all levels?
Lamps:Are they all working? Are the lenses
clean?
Tires:They are vitally important to a safe,
trouble-free trip. Is the tread good enough
for long-distance driving? Are the tires
all inated to the recommended pressure?
Weather Forecasts:What is the weather
outlook along your route? Should you
delay your trip a short time to avoid a major
storm system?
Maps:Do you have up-to-date maps?
370

Highway Hypnosis
Is there actually such a condition as highway
hypnosis? Or is it just plain falling asleep at the
wheel? Call it highway hypnosis, lack of
awareness, or whatever.
There is something about an easy stretch of road
with the same scenery, along with the hum of
the tires on the road, the drone of the engine, and
the rush of the wind against the vehicle that
can make you sleepy. Do not let it happen to you!
If it does, your vehicle can leave the road in
less than a second, and you could crash and be
injured.
What can you do about highway hypnosis? First,
be aware that it can happen.
Then here are some tips:
Make sure your vehicle is well ventilated, with
a comfortably cool interior.
Keep your eyes moving. Scan the road ahead
and to the sides. Check your mirrors and your
instruments frequently.
If you get sleepy, pull off the road into a rest,
service, or parking area and take a nap, get
some exercise, or both. For safety, treat
drowsiness on the highway as an emergency.
Hill and Mountain Roads
Driving on steep hills or mountains is different
from driving in at or rolling terrain.
371

Towing
Towing Your Vehicle
Consult your dealer or a professional towing
service if you need to have your disabled vehicle
towed. SeeRoadside Assistance Program on
page 532.
If you want to tow your vehicle behind another
vehicle for recreational purposes (such as behind
a motorhome), see “Recreational Vehicle
Towing” following.
Recreational Vehicle Towing
Recreational vehicle towing means towing your
vehicle behind another vehicle – such as behind a
motorhome. The two most common types of
recreational vehicle towing are known as “dinghy
towing” (towing your vehicle with all four wheels
on the ground) and “dolly towing” (towing
your vehicle with two wheels on the ground and
two wheels up on a device know as a “dolly”).With the proper preparation and equipment, many
vehicles can be towed in these ways. See
“Dinghy Towing” and “Dolly Towing,” following.
Here are some important things to consider before
you do recreational vehicle towing:
What’s the towing capacity of the towing
vehicle? Be sure you read the tow vehicle
manufacturer’s recommendations.
How far will you tow? Some vehicles have
restrictions on how far and how long they
can tow.
Do you have the proper towing equipment?
See your dealer or trailering professional
for additional advice and equipment
recommendations.
Is your vehicle ready to be towed? Just as
you would prepare your vehicle for a long
trip, you’ll want to make sure your vehicle is
prepared to be towed. SeeBefore Leaving on
a Long Trip on page 370.
384

Dinghy Towing
Your vehicle was not designed to be towed with
all of its wheels on the ground. It can be towed
with the two rear wheels on the ground. See “Dolly
Towing” following for more information.
Dolly Towing
To dolly tow your vehicle, do the following:
1. Put the front wheels on a dolly.
2. Put the vehicle in PARK (P).
3. Set the parking brake and then remove
the key.
4. Clamp the steering wheel in a straight-ahead
position with a clamping device designed for
towing.
5. Release the parking brake.
Level Control
With this feature, the rear of the vehicle is
automatically kept level as you load or unload
your vehicle. However, you should still not exceed
the GVWR or the GAWR. SeeLoading Your
Vehicle on page 378.
You may hear the compressor operating when you
load or unload your vehicle, and periodically as
the system self-adjusts. This is normal. The
compressor should operate for brief periods of
time. If the sound continues for an extended period
of time, your vehicle needs service.
Using heavier suspension components to get
added durability might not change your weight
ratings. Ask your dealer to help you load
your vehicle the right way.
385

Maintenance When Trailer Towing
Your vehicle will need service more often when
you are pulling a trailer. See the Maintenance
Schedule for more on this. Things that are
especially important in trailer operation are
automatic transaxle uid, engine oil, belts, cooling
system, and brake system. Each of these is
covered in this manual, and the Index will help
you nd them quickly. If you are trailering, it is a
good idea to review these sections before you
start your trip.Check periodically to see that all hitch nuts and
bolts are tight.
Trailer Wiring Harness
Your vehicle may have a trailer wiring harness
package located in the glove box. It can be
connected from the rear of your vehicle to your
trailer. Contact your dealer for more information.
396

Service........................................................ 400
Accessories and Modications................... 400
California Proposition 65 Warning.............. 401
Doing Your Own Service Work.................. 401
Adding Equipment to the Outside of Your
Vehicle................................................... 402
Fuel............................................................. 402
Gasoline Octane........................................ 402
Gasoline Specications.............................. 402
California Fuel........................................... 403
Additives................................................... 403
Fuels in Foreign Countries........................ 404
Filling the Tank......................................... 405
Filling a Portable Fuel Container............... 407
Checking Things Under
the Hood.................................................. 408
Hood Release........................................... 409
Engine Compartment Overview.................. 410
Engine Oil................................................. 411
Engine Oil Life System.............................. 414
Engine Air Cleaner/Filter............................ 416Automatic Transaxle Fluid......................... 417
Engine Coolant.......................................... 420
Radiator Pressure Cap.............................. 423
Engine Overheating................................... 423
Overheated Engine Protection
Operating Mode..................................... 425
Cooling System......................................... 426
Power Steering Fluid ................................. 432
Windshield Washer Fluid........................... 433
Brakes...................................................... 434
Battery...................................................... 437
Jump Starting............................................ 438
Bulb Replacement....................................... 443
Halogen Bulbs........................................... 443
Headlamps and Sidemarker Lamps........... 443
Front Turn Signal, Parking and Daytime
Running Lamps (DRL)........................... 445
Taillamps, Turn Signal, Stoplamps and
Back-up Lamps...................................... 445
License Plate Lamp................................... 447
Replacement Bulbs................................... 447
Section 5 Service and Appearance Care
397

Windshield Wiper Blade Replacement....... 447
Tires............................................................ 449
Tire Sidewall Labeling............................... 450
Tire Terminology and Denitions............... 453
Ination - Tire Pressure............................. 456
High-Speed Operation............................... 458
Tire Inspection and Rotation...................... 459
When It Is Time for New Tires.................. 461
Buying New Tires...................................... 461
Different Size Tires and Wheels................ 463
Uniform Tire Quality Grading..................... 464
Wheel Alignment and Tire Balance............ 465
Wheel Replacement.................................. 465
Tire Chains............................................... 467
Accessory Inator...................................... 468
If a Tire Goes Flat.................................... 470
Changing a Flat Tire................................. 470
Removing the Spare Tire and Tools.......... 472
Removing the Flat Tire and Installing the
Spare Tire............................................. 474
Secondary Latch System........................... 481
Storing a Flat or Spare Tire and Tools...... 483
Compact Spare Tire.................................. 486Appearance Care........................................ 487
Cleaning the Inside of Your Vehicle.......... 487
Fabric/Carpet............................................. 488
Leather...................................................... 489
Instrument Panel, Vinyl, and Other Plastic
Surfaces................................................ 490
Care of Safety Belts.................................. 490
Weatherstrips............................................ 490
Washing Your Vehicle............................... 491
Cleaning Exterior Lamps/Lenses................ 491
Finish Care............................................... 491
Windshield, Backglass, and
Wiper Blades......................................... 492
Aluminum or Chrome-Plated Wheels......... 492
Tires......................................................... 493
Sheet Metal Damage................................. 493
Finish Damage.......................................... 494
Underbody Maintenance............................ 494
Chemical Paint Spotting............................ 494
Vehicle Care/Appearance Materials............ 495
Vehicle Identication.................................. 496
Vehicle Identication Number (VIN)........... 496
Service Parts Identication Label............... 496
Section 5 Service and Appearance Care
398

Electrical System........................................ 496
Add-On Electrical Equipment..................... 496
Headlamp Wiring....................................... 497
Windshield Wiper Fuses............................ 497
Power Windows and Other Power
Options.................................................. 497Fuses and Circuit Breakers....................... 497
Instrument Panel Fuse Block..................... 498
Underhood Fuse Block.............................. 500
Capacities and Specications.................... 503
Section 5 Service and Appearance Care
399