2007 CHEVROLET COBALT Scheduled Maintenance

Passenger Compartment Air Filter
Passenger compartment air, both outside air and
recirculated air, is routed through a passenger
compartment lter. The lter removes certain
particles from the air, including pollen and dust
particles. Reductions in airow, which may occur
more quickly in dusty areas, indicate that the lter
needs to be replaced early.
The lter should be replaced as part of routine
scheduled maintenance. SeeScheduled
Maintenance on page 396for replacement
intervals. See your dealer for details on changing
the lter. To nd out what type of lter to use,
seeNormal Maintenance Replacement Parts
on page 408.To access the passenger compartment air lter
you must go through the glove box.
1. Open the glove box and remove all articles
from the inside.
2. Tilt the glove box door down by squeezing on
each side of the glove box until the door can
be lowered from its track. Lower the glove
box door.
162

ECON (Economy)
Press the information button until ECON is
displayed. This mode shows how many miles
per gallon (mpg) or liters per 100 kilometers
(L/100 km) your vehicle is getting based on
current and past driving conditions.
Press and hold the reset button while ECON is
displayed to reset the average fuel economy.
Average fuel economy will then be calculated
starting from that point. If the average fuel
economy is not reset, it will be continually
updated each time you drive.
AV (Average) SPEED
Press the information button until AV SPEED is
displayed. This mode shows the vehicle’s average
speed in miles per hour (mph) or kilometers per
hour (km/h).
Press and hold the reset button while AV SPEED
is displayed to reset the average vehicle speed.
OIL LIFE
Press the information button until OIL LIFE is
displayed. The engine oil life system shows
an estimate of the oil’s remaining useful life. It will
show 100% when the system is reset after an
oil change. It will alert you to change your oil on a
schedule consistent with your driving conditions.
In addition to the engine oil life system monitoring
the oil life, additional maintenance is recommended
in the Maintenance Schedule in this manual.
SeeEngine Oil on page 293andScheduled
Maintenance on page 396.
Always reset the engine oil life system after an oil
change. See “How to Reset the Engine Oil Life
System” underEngine Oil Life System on
page 298.
COOLANT
Press the information button until COOLANT is
displayed. This mode shows the temperature
of the engine coolant in either degrees
Fahrenheit (°F) or degrees Celsius (°C).
183

DIC Warnings and Messages
These messages appear if there is a problem
detected in one of your vehicle’s systems.
A message will clear when the vehicle’s condition
is no longer present. To acknowledge a message
and clear it from the display, press and hold
any of the DIC buttons. If the condition is still
present, the warning message will come back on
the next time the vehicle is turned off and back
on. With most messages, a warning chime sounds
when the message displays. Your vehicle may
have other warning messages.
AUTO (Automatic) LIGHTS OFF
This message displays if the automatic headlamp
system is disabled with the headlamp switch.
AUTO (Automatic) LIGHTS ON
This message displays if the automatic headlamp
system is enabled with the headlamp switch.
BRAKE FLUID
This message displays to inform the driver that the
brake uid level is low while the ignition is on.
The brake system warning light on the instrument
panel cluster also comes on. SeeBrake System
Warning Light on page 171for more information.
Have the brake system serviced by your dealer
as soon as possible.
CHANGE OIL SOON
This message displays when the life of the engine
oil has expired and it should be changed.
When you acknowledge the CHANGE OIL SOON
message by clearing it from the display, you
still must reset the engine oil life system
separately. SeeEngine Oil Life System on
page 298andScheduled Maintenance on
page 396for more information.
CHECK GAS CAP
This message displays if the fuel cap has not
been fully tightened. Recheck the fuel cap to
make sure that it is on properly. A few driving
trips with the cap properly installed should turn
the message off.
184

When You Are Ready to Leave After
Parking on a Hill
1. Apply your regular brakes and hold the pedal
down while you:
Start your engine.
Shift into a gear.
Release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the
chocks.
4. Stop and have someone pick up and store
the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when
you are pulling a trailer. SeeScheduled
Maintenance on page 396for more on this.
Things that are especially important in trailer
operation are transaxle uid (do not overll),
engine oil, drive belt, 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 this
information before you start your trip.
Check periodically to see that all hitch nuts and
bolts are tight.
Engine Cooling When Trailer Towing
Your cooling system may temporarily overheat
during severe operating conditions. SeeEngine
Overheating on page 309.
276

Engine Air Cleaner/Filter
SeeEngine Compartment Overview on page 290
for the location of the engine air cleaner/lter.
When to Inspect the Engine
Air Cleaner/Filter
Inspect the air cleaner/lter at the MaintenanceII
intervals and replace it at the rst oil change
after each 50,000 mile (85 000 km) interval.
SeeScheduled Maintenance on page 396for
more information. If you are driving in dusty/dirty
conditions, inspect the lter at each engine oil
change.
How to Inspect the Engine
Air Cleaner/Filter
2.2L and 2.4L L4 Engines
To inspect the air cleaner/lter remove the lter
from the vehicle and lightly shake the lter to
release loose dust and dirt. If the lter remains
caked with dirt, a new lter is required. Never use
compressed air to clean the lter.To inspect or replace the lter, remove the screws
that hold the cover on and lift off the cover.
Be sure to reinstall the cover tightly.
2.0L L4 Supercharged Engine
There is a special procedure for inspecting and
replacing the lter. Because this procedure is
difficult, you should have it done at your dealer
service department. Contact your dealer for
additional information, or the procedure can be
found in the service manual. To purchase a service
manual, seeService Publications Ordering
Information on page 430.
300

Replacement Bulbs
Exterior Lamps Bulb Number
Back-Up Lamps 921
Center High-Mounted
Stoplamp (CHMSL)912
Front Parking/Turn Signal Lamps 3157KX
Halogen Headlamps,
High/Low-Beam9007 LL
License Plate Lamp and
Sidemarker194
Stoplamp, Taillamp and
Turn Signal Lamps3057KX
For replacement bulbs not listed here, contact
your dealer/retailer.
Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected for
wear or cracking. SeeScheduled Maintenance
on page 396for more information on wiper blade
inspection.Replacement blades come in different types and
are removed in different ways. For proper type and
length, seeNormal Maintenance Replacement
Parts on page 408. Here is how to remove
the wiper blades:
1. Pull the windshield wiper arm away from the
windshield.
2. Push the release lever and slide the wiper
assembly toward the driver’s side of the
vehicle.
3. Install a new blade by reversing Steps 1 and 2.
337

The purpose of regular rotation is to achieve
more uniform wear for all tires on the vehicle. The
rst rotation is the most important. SeeScheduled
Maintenance on page 396.
When rotating your tires, always use the correct
rotation pattern shown here.
Do not include the compact spare tire in your tire
rotation.
After the tires have been rotated, adjust the front
and rear ination pressures as shown on the
Tire and Loading Information label.Make certain that all wheel nuts are properly
tightened. See “Wheel Nut Torque” under
Capacities and Specications on page 390.
{CAUTION:
Rust or dirt on a wheel, or on the parts to
which it is fastened, can make wheel nuts
become loose after time. The wheel could
come off and cause an accident. When
you change a wheel, remove any rust or
dirt from places where the wheel attaches
to the vehicle. In an emergency, you can
use a cloth or a paper towel to do this;
but be sure to use a scraper or wire brush
later, if needed, to get all the rust or dirt
off. SeeChanging a Flat Tire on page 358.
350

Maintenance Schedule................................ 394
Introduction............................................... 394
Maintenance Requirements........................ 394
Your Vehicle and the Environment............ 394
Using the Maintenance Schedule............... 395
Scheduled Maintenance............................. 396
Additional Required Services..................... 398
Maintenance Footnotes.............................. 400Owner Checks and Services..................... 402
At Each Fuel Fill....................................... 402
At Least Once a Month............................. 403
At Least Once a Year............................... 403
Recommended Fluids and Lubricants........ 406
Normal Maintenance Replacement Parts.... 408
Engine Drive Belt Routing......................... 409
Maintenance Record.................................. 410
Section 6 Maintenance Schedule
393