2010 CHEVROLET HHR service indicator

Brake Assist
If this vehicle has ESC with ABS, it also has a Brake
Assist feature designed to assist the driver in stopping
or decreasing vehicle speed in emergency driving
conditions. This feature uses the stability system
hydraulic brake control module to supplement the power
brake system under conditions where the driver has
quickly and forcefully applied the brake pedal in an
attempt to quickly stop or slow down the vehicle. The
stability system hydraulic brake control module
increases brake pressure at each corner of the vehicle
until the ABS activates. Minor brake pedal pulsations or
pedal movement during this time is normal and the
driver should continue to apply the brake pedal as the
driving situation dictates The Brake Assist feature will
automatically disengage when the brake pedal is
released or brake pedal pressure is quickly decreased.
Electronic Stability Control (ESC)
The vehicle has an Electronic Stability Control (ESC)
system which combines antilock brake, and traction and
stability control systems that help the driver maintain
directional control of the vehicle in most driving
conditions.
When the vehicle is started and begins to move, the
system performs several diagnostic checks to ensure
there are no problems. The system may be heard or felt
while it is working. This is normal and does not mean
there is a problem with the vehicle. The system should
initialize before the vehicle reaches 20 mph (32 km/h).
If the system fails to turn on or activate, the ESC/TCS
light comes on, and the ESC OFF and/or SERVICE
ESC message displays.
For more information, seeDriver Information Center
(DIC)
on page 4‑46and Electronic Stability Control
(ESC)/Traction Control System (TCS) Indicator/Warning
Light on page 4‑33.
5-6

Notice:If the wheel(s) of one axle are allowed to
spin excessively while the ESC/TCS, ABS and
Brake warning lights and the SERVICE ESC and/or
SERVICE TRACTION messages are displayed, the
differential could be damaged. The repairs would
not be covered by the vehicle warranty. Reduce
engine power and do not spin the wheel(s)
excessively while these lights and this message
are displayed.
Notice: When traction control is turned off,
or Competitive Driving Mode is active, it is
possible to lose traction. If you attempt to shift with
the drive wheels spinning with a loss of traction,
it is possible to cause damage to the transmission.
Do not attempt to shift when the drive wheels do
not have traction. Damage caused by misuse of the
vehicle is not covered. See the warranty book for
additional information.
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 transmission. When this happens, a reduction
in acceleration may be noticed or a noise or vibration
may be heard. This is normal.
If the vehicle is in cruise control while the system
activates, the ESC/TCS light flashes and the cruise
control automatically disengages. The cruise control
can be re-engaged when road conditions allow. See
Cruise Control on page 4‑8. Adding non‐dealer/non‐retailer accessories can affect
the vehicle's performance. See
Accessories and
Modifications
on page 6‑3for more information.
Enhanced Traction System (ETS)
The vehicle may have an Enhanced Traction System
(ETS) that limits wheel spin. This is especially useful in
slippery road conditions. The system operates only if it
senses that one or both of the front wheels are spinning
or beginning to lose traction. When this happens, the
system reduces engine power and may also upshift the
transmission to limit wheel spin.
If the vehicle has ETS, there is not an ESC/TCS button
on the instrument panel. To turn the system off, shift to
L (Low) or R (Reverse). There is more information about
how to turn the system off later in this section.
The ETS indicator/warning light flashes and LOW
TRACTION appears on the Driver Information Center
(DIC) when the traction control system is actively
limiting wheel spin. The system may be heard or felt
while it is working, but this is normal. Slippery road
conditions may exist if this message is displayed, so
adjust your driving accordingly.
If the vehicle is in cruise control when the ETS begins
to limit wheel spin, the cruise control will automatically
disengage. The cruise control can be re-engaged when
road conditions allow. See Cruise Control on page 4‑8.
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The ETS indicator/warning light may come on for the
following reasons:
.The indicator/warning light flashes while the
traction control system is limiting wheel spin.
.If the system is turned off by moving the shift lever
to L (Low), the indicator/warning light comes on
and stays on. To turn the system back on, move
the shift lever back to a position other than L (Low).
The indicator/warning light should go off.
.The indicator/warning light will come on when the
parking brake is set with the engine running, and it
will stay on if the parking brake does not release
fully. If the transmission shift lever is in any position
other than L (Low) and the indicator/warning light
stays on after the parking brake is fully released,
there is a problem with the system.
.If the traction control system is affected by an
engine related problem, the system will turn off
and the indicator/warning light will come on.If the ETS indicator/warning light comes on and
stays on for an extended period of time when the
transmission shift lever is in any position other than
L (Low), the vehicle may need service.
When this light is on solid, the system will not limit
wheel spin. Adjust your driving accordingly.
Check the DIC messaging to determine whether it is
because of the driver turning off the system, or that the
system may not be working properly and the vehicle
requires service. When this light is turned on, either the
SERVICE TRACTION or TRACTION OFF message will
be displayed.
See
DIC Warnings and Messages
on page 4‑48for
more information on the messages associated with this
light.
To limit wheel spin, especially in slippery road
conditions, ETS should always be left on. But the
system can be turned off if needed.
To turn the system off, shift to L (Low) or R (Reverse).
When the system is turned off, the ETS indicator/
warning light will come on and stay on and the
TRACTION OFF message will be displayed when
the gear shift is in L (Low). The indicator/warning light
and message will not come on when the gear shift is in
R (Reverse). If the ETS is limiting wheel spin when the
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transmission is shifted to L (Low) or R (Reverse) to turn
the system off, the indicator/warning light and
TRACTION OFF will come on in L (Low). But the
system will not turn off right away. It will wait until there
is no longer a current need to limit wheel spin. SeeDIC
Warnings and Messages
on page 4‑48for more
information on the messages associated with this light.
The system can be turned back on at any time by
shifting to D (Automatic Overdive) or I (Intermediate).
The ETS indicator/warning light should go off.
Adding non‐dealer/non‐retailer accessories can affect
the vehicle's performance. See Accessories and
Modifications
on page 6‑3for more information.
Limited-Slip Differential
Vehicles with a limited-slip differential can give more
traction on snow, mud, ice, sand or gravel. It works like
a standard axle most of the time, but when traction is
low, this feature allows the drive wheel with the most
traction to move the vehicle. The limited slip design has
minimal impact to the steering feel, but boosts the
traction performance under all conditions.
Steering
Electric Power Steering
If the engine stalls while driving, the power steering
assist system will continue to operate until you are
able to stop the vehicle. If power steering assist is lost
because the electric power steering system is not
functioning, the vehicle can be steered but it will take
more effort.
If you turn the steering wheel in either direction several
times until it stops, or hold the steering wheel in the
stopped position for an extended amount of time, you
may notice a reduced amount of power steering assist.
The normal amount of power steering assist should
return shortly after a few normal steering movements.
The electric power steering system does not require
regular maintenance. If you suspect steering system
problems and/or the POWER STEERING message
comes on, contact your dealer/retailer for service
repairs. See DIC Warnings and Messages
on
page 4‑48.
5-13

Some gasolines that are not reformulated for low
emissions can contain an octane-enhancing additive
called methylcyclopentadienyl manganese tricarbonyl
(MMT); ask the attendant where you buy gasoline
whether the fuel contains MMT. We recommend against
the use of such gasolines. Fuels containing MMT can
reduce the life of spark plugs and the performance of
the emission control system could be affected. The
malfunction indicator lamp might turn on. If this occurs,
return to your dealer/retailer for service.
Fuel E85 (85% Ethanol)
The 8th digit of the Vehicle Identification Number (VIN)
shows the code letter or number that identifies the
vehicle's engine. The VIN is at the top left of the
instrument panel. SeeVehicle Identification Number
(VIN) on page 6‑118.
If your vehicle has the 2.2L L4 engine (VIN Code B) or
the 2.4L L4 engine (VIN Code V), you can use either
unleaded gasoline or ethanol fuel containing up to
85% ethanol (E85). See Fuel
on page 6‑5. In all
other engines, use only the unleaded gasoline
described under Gasoline Octane on page 6‑6. Only vehicles that have the 2.2L L4 engine
(VIN Code B) or the 2.4L L4 engine (VIN Code V)
can use 85% ethanol fuel (E85). We encourage the
use of E85 in vehicles that are designed to use it. The
ethanol in E85 is a
“renewable”fuel, meaning it is made
from renewable sources such as corn and other crops.
Many service stations will not have an 85% ethanol
fuel (E85) pump available. The U. S. Department
of Energy has an alternative fuels website
(www.eere.energy.gov/afdc/infrastructure/locator.html)
that can help you find E85 fuel. Those stations that
do have E85 should have a label indicating ethanol
content. Do not use the fuel if the ethanol content is
greater than 85%.
At a minimum, E85 should meet ASTM Specification
D 5798. By definition, this means that fuel labeled E85
will have an ethanol content between 70% and 85%.
Filling the fuel tank with fuel mixtures that do not meet
ASTM specifications can affect driveability and could
cause the malfunction indicator lamp to come on.
6-8

7. Start the engine and let it run until you can feel theupper radiator hose getting hot. Watch out for the
engine cooling fan.
8. By this time, the coolant level inside the radiator filler port may be lower. If the level is lower, add
more of the proper DEX-COOL
®coolant mixture
through the fill port until the level reaches the base
of the fill port.
9. Then replace the pressure cap. At any time during this procedure, if coolant begins to flow out of the
fill port, reinstall the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
10. When the engine has cooled, check the coolant in the coolant recovery tank. The level in the coolant
recovery tank should be at the COLD FILL line
when the engine is cold.
Engine Overheating
The vehicle has several indicators to warn of engine
overheating.
You will find a coolant temperature warning light and a
coolant temperature gauge on your vehicle's instrument
panel. See Engine Coolant Temperature Warning Light
on page 4‑34andEngine Coolant Temperature Gaugeon page 4‑34for more information.
You may decide not to lift the hood when this warning
appears, but instead get service help right away. See
Roadside Assistance Program on page 8‑6.
If you do decide to lift the hood, make sure the vehicle
is parked on a level surface.
Then check to see if the engine cooling fans are
running. If the engine is overheating, both fans should
be running. If they are not, do not continue to run the
engine and have the vehicle serviced.
Notice: Engine damage from running the engine
without coolant is not covered by the warranty.
Notice: If the engine catches fire because of being
driven with no coolant, your vehicle can be badly
damaged. The costly repairs would not be covered
by the vehicle warranty.
6-34

Brake Wear
This vehicle has front disc brakes and could have rear
drum brakes or rear 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 the vehicle is moving,
except when applying the brake pedal firmly.
{WARNING:
The brake wear warning sound means that soon
the brakes will not work well. That could lead to
an accident. When the brake wear warning sound
is heard, have the 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 first 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 specifications in
Capacities and Specifications on page 6‑125.
If the vehicle has rear drum brakes, they do not
have wear indicators, but if a rear brake rubbing
noise is heard, have the rear brake linings inspected
immediately. Rear brake drums should be removed and
inspected each time the tires are removed for rotation or
changing. When the front brake pads are replaced,
have the rear brakes inspected, too.
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 the brakes are applied, with or without the
vehicle moving, the brakes adjust for wear.
6-39

E
E85 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
EDR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-15
Electrical Equipment, Add-On . . . . . . . . . . . . . . . . . . . . 6-118
Electrical SystemEngine Compartment Fuse Block . . . . . . . . . . . . . . . .6-122
Floor Console Fuse Block . . . . . . . . . . . . . . . . . . . . . . .6-120
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . 6-119
Headlamp Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-119
Power Windows and Other Power Options . . . . . . 6-119
Windshield Wiper Fuses . . . . . . . . . . . . . . . . . . . . . . . . . 6-119
Electronic Immobilizer PASS-Key
®III+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Electronic Immobilizer Operation PASS-Key
®III+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20
Electronic Stability Control . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
Electronic Stability Control Indicator Light . . . . . . . . . . 4-33
Engine
Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25
Check and Service Engine Soon Lamp . . . . . . . . . . . 4-35
Compartment Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29
Coolant Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 4-34
Coolant Temperature Warning Light . . . . . . . . . . . . . . 4-34
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28
Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13 Engine (cont.)
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39
Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19
Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Engine Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23
Enhanced Traction System (ETS) Active Light . . . . . 5-11
Enhanced Traction System (ETS) Indicator/ Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
Entry/Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Event Data Recorders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-16
Extender, Safety Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34F
Filter Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25
Finish Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-117
Fixed Mast Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-95
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Flashers, Hazard Warning . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-77
Flat Tire, Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-88
Flat Tire, Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-106
Fluid Automatic Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27
Windshield Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-36
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