2008 CHEVROLET HHR park assist

Average reaction time is about three-fourths of a
second. But that is only an average. It might be less
with one driver and as long as two or three seconds or
more with another. Age, physical condition, alertness,
coordination, and eyesight all play a part. So do alcohol,
drugs, and frustration. But even in three-fourths of a
second, a vehicle moving at 60 mph (100 km/h) travels
66 feet (20 m). That could be a lot of distance in an
emergency, so keeping enough space between
your vehicle and others is important.
And, of course, actual stopping distances vary greatly
with the surface of the road, whether it is pavement
or gravel; the condition of the road, whether it is
wet, dry, or icy; tire tread; the condition of the brakes;
the weight of the vehicle; and the amount of brake
force applied.
Avoid needless heavy braking. Some people drive in
spurts — heavy acceleration followed by heavy
braking — rather than keeping pace with traffic. This is
a mistake. The brakes might not have time to cool
between hard stops. The brakes will wear out much
faster if you do a lot of heavy braking. If you keep pace
with the traffic and allow realistic following distances,
you will eliminate a lot of unnecessary braking.
That means better braking and longer brake life.If your vehicle’s engine ever stops while you are driving,
brake normally but do not pump the brakes. If you do,
the pedal could get harder to push down. If the
engine stops, you will still have some power brake
assist. But you will use it when you brake. Once the
power assist is used up, it can take longer to stop and
the brake pedal will be harder to push.
If your vehicle has Electronic Stability Control (ESC)
and the 2.0L turbocharged engine, it also has a
hydraulic brake boost feature which supplements the
power brake system to maintain consistent brake
performance under conditions of low brake booster
vacuum. Low brake booster vacuum conditions
can include initial start up after the vehicle has been
parked for several hours, very frequent brake stops, or
high altitude driving. When hydraulic brake boost is
active, you might feel minor brake pulsation or
movement but this is normal. If brake pedal feel changes
or the brake pedal feels hard to push, you might not
be receiving the intended brake boost and the SVC
BRAKE SYSTEM DIC message may be displayed.
Adding non-dealer/non-retailer accessories can affect
your vehicle’s performance. SeeAccessories and
Modifications on page 5-3.
4-4

Braking in Emergencies
At some time, nearly every driver gets into a situation
that requires hard braking.
If you have ABS, you can steer and brake at the same
time. However, if you do not have ABS, your rst
reaction — to hit the brake pedal hard and hold it
down — might be the wrong thing to do. Your wheels
can stop rolling. Once they do, the vehicle cannot
respond to your steering. Momentum will carry it in
whatever direction it was headed when the wheels
stopped rolling. That could be off the road, into the very
thing you were trying to avoid, or into traffic.
If you do not have ABS, use a “squeeze” braking
technique. This will give you maximum braking while
maintaining steering control. You can do this by pushing
on the brake pedal with steadily increasing pressure.
In an emergency, you will probably want to squeeze the
brakes hard without locking the wheels. If you hear or
feel the wheels sliding, ease off the brake pedal.
This will help you retain steering control. If you do have
ABS, it is different. SeeAntilock Brake System (ABS)
on page 4-5.
In many emergencies, steering can help you more than
even the very best braking.
Brake Assist
If your vehicle has ESC with ABS, it also has a brake
assist feature that responds to emergency braking
by generating additional pressure and engaging
the ABS. When this happens, the brake pedal will feel
easier to push. Just hold the brake pedal down
rmly and let the system work for you. You might feel
the brakes vibrate or notice some noise, but this is
normal. The brakes will return to normal operation after
the brake pedal is released.
Brake assist cannot compensate for unsafe driving
practices and braking effectiveness, itself, depends on
the condition of the road, tires, and brakes and
vehicle mass.
Traction Control System (TCS)
Your vehicle may have a Traction Control System (TCS)
that limits wheel spin. This is especially useful in
slippery road conditions. The system operates only if it
senses that the wheels are spinning too much or
are beginning to lose traction. When this happens, the
system works the front brakes and reduces engine
power by closing the throttle and managing engine spark
to limit wheel spin.
If your vehicle has TCS, there is a ESC/TCS button
located on the instrument panel.
4-6

Restraint System Check
Checking the Restraint Systems....................1-72
Replacing Restraint System Parts After a
Crash.....................................................1-73
Retained Accessory Power (RAP)......................2-25
Roadside
Assistance Program....................................... 7-6
Rocking Your Vehicle to Get it Out....................4-26
Roof Rack System..........................................2-50
Routing, Engine Drive Belt...............................6-15
Running the Engine While Parked.....................2-38
S
Safety Belt
Reminder Light............................................3-30
Safety Belts
Care of....................................................5-112
How to Wear Safety Belts Properly................1-18
Lap-Shoulder Belt........................................1-26
Safety Belt Extender....................................1-32
Safety Belt Use During Pregnancy.................1-32
Safety Belts Are for Everyone.......................1-12
Safety Warnings and Symbols.............................. iii
Scheduled Maintenance..................................... 6-4
Seatback, Folding Passenger............................. 1-8Seats
Driver Seat Height Adjuster............................. 1-3
Head Restraints............................................ 1-7
Heated Seats............................................... 1-4
Passenger Folding Seatback........................... 1-8
Power Lumbar.............................................. 1-4
Power Seat.................................................. 1-3
Reclining Seatbacks...................................... 1-5
Split Folding Rear Seat................................1-10
Securing a Child Restraint
Rear Seat Position......................................1-51
Right Front Seat Position..............................1-53
Security Light.................................................3-44
Service........................................................... 5-3
Accessories and Modications......................... 5-3
Adding Equipment to the Outside of Your
Vehicle..................................................... 5-4
California Pershlorate Materials Requirements . . . 5-4
California Proposition 65 Warning.................... 5-3
Doing Your Own Work................................... 5-4
Engine Soon Light.......................................3-40
Publications Ordering Information...................7-15
Service, Scheduling Appointments....................... 7-8
Servicing Your Airbag-Equipped Vehicle..............1-70
Sheet Metal Damage.....................................5-116
Shifting Into Park (P).......................................2-34
Shifting Out of Park (P)...................................2-36
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