ECU CHEVROLET COBALT 2006 1.G Service Manual

1. You can remove the ll neck pressure cap when
the intercooler system, including the upper
intercooler hose, is no longer hot. Turn the pressure
cap slowly counterclockwise about one-quarter of
a turn. If you hear a hiss, wait for that to stop. This
will allow any remaining pressure to be vented.
2. Then keep turning the pressure cap slowly, and
remove it.
3. Add the proper DEX-COOL
®coolant mixture to the
ll neck, until there is coolant visible in the horizontal
tube section of the ll neck.
4. With the ll neck pressure cap off, start the engine
and let it run for at least 30 seconds. Watch out for
the engine cooling fan. Turn the engine off. By this
time, the coolant level inside the ll neck may be
lower. If the level drops so that coolant is no longer
visible in the horizontal tube section of the ll neck,
add more of the DEX-COOL
®coolant mixture to the
ll neck until the level is again visible in the horizontal
tube section.
5. Replace the intercooler system pressure cap.
Be sure the pressure cap is hand-tight and fully
seated.
If the coolant is not at the proper level when the
system cools down again, see your dealer.
Coolant Surge Tank Pressure Cap
Notice:If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
The coolant surge tank pressure cap must be fully
installed on the coolant surge tank. SeeEngine
Compartment Overview on page 5-12for more
information on location.
Engine Overheating
You will nd an engine coolant temperature warning
light on your vehicle’s instrument panel. SeeEngine
Coolant Temperature Warning Light on page 3-32for
more information.
5-29

Back-Up Lamps (Coupe)
To replace a back-up lamp bulb, do the following:
1. Open the trunk. SeeTrunk on page 2-10for more
information.
2. Locate the back-up lamp bulb assembly in the
trunk lid.3. Remove the bulb socket by turning it
counterclockwise.
On vehicles that have a back-up lamp cover, rst
remove it by depressing the tab at the top.
4. Pull out the old bulb.
5. Install a new bulb.
6. Reinstall the bulb socket by aligning the tabs and
turning it clockwise to secure.
5-54

Tire Chains
{CAUTION:
If your vehicle has 205/55R16, P205/55R16,
P205/50R17 or 215/45R18 size tires, do not use
tire chains. There is not enough clearance.
Tire chains used on a vehicle without the
proper amount of clearance can cause damage
to the brakes, suspension, or other vehicle
parts. The area damaged by the tire chains
could cause you to lose control of your vehicle
and you or others may be injured in a crash.
Use another type of traction device only if its
manufacturer recommends it for use on your
vehicle and tire size combination, and road
conditions. Follow that manufacturer’s
instructions. To help avoid damage to your
vehicle, drive slowly, readjust or remove the
device if it is contacting your vehicle, and do
not spin your vehicle’s wheels.
If you do nd traction devices that will t,
install them on the front tires.Notice:If your vehicle has a tire size other than
205/55R16, P205/55R16, P205/50R17 or 215/45R18
size tires, use tire chains only where legal and only
when you must. Use only SAE Class S-type chains
that are the proper size for your tires. Install them on
the front tires and tighten them as tightly as possible
with the ends securely fastened. Drive slowly and
follow the chain manufacturer’s instructions. If you
can hear the chains contacting your vehicle, stop and
retighten them. If the contact continues, slow down
until it stops. Driving too fast or spinning the wheels
with chains on will damage your vehicle.
5-72

A. Cover
B. Retainer
C. Jack and Wheel Wrench
D. Stow Bolt Extension
E. Spare Tire
F. Foam Support
G. Bolt
To store a at or spare tire and tools, do the following:
1. Remove the stow bolt extension rod and sleeve
from the jack.
2. Screw the stow bolt extension rod and the sleeve
into the existing spare tire hold-down bolt.
3. Place the at tire face down into the spare tire hub.
Avoid scraping the aluminum wheel, if equipped, on
the hold-down bolt.
4. Re-attach the wheel wrench to the jack.
5. Place the jack into the center of the at tire, being
careful not to scratch the inside of the wheel.
6. Place the smaller jack hold-down nut in a safe
place for use when you put the compact spare
tire back into the trunk.
7. Remove the plastic sleeve from the stow bolt
extension rod. Secure the jack and road wheel
using the larger plastic retainer.
The compact spare tire is for temporary use only.
Replace the compact spare with a full-size tire as soon
as possible.
Uplevel Model
5-87

At Each Fuel Fill
It is important to perform these underhood checks at
each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-15for further
details.
Notice:It is important to check your oil regularly
and keep it at the proper level. Failure to keep your
engine oil at the proper level can cause damage
to your engine not covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-24for further details.
Intercooler Coolant Level Check
(2.0L Supercharged Engine)
Check the coolant level and add DEX-COOL®coolant
mixture if necessary. SeeEngine Coolant on page 5-24
for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in the
windshield washer uid reservoir and add the proper
uid if necessary.
At Least Once a Month
Tire Ination Check
Visually inspect your vehicle’s tires and make sure they
are inated to the correct pressures. Do not forget to
check the spare tire. SeeTires on page 5-56for further
details. Check to make sure the spare tire is stored
securely. SeeChanging a Flat Tire on page 5-74.
Tire Wear Inspection
Tire rotation may be required for high mileage highway
drivers prior to the Engine Oil Life System service
notication. Check the tires for wear and, if necessary,
rotate the tires. SeeTire Inspection and Rotation on
page 5-65.
6-9

While we hope you never have the occasion to use our
service, it is added security while traveling for you and
your family. Remember, we are only a phone call away.
Chevrolet Roadside Assistance:1-800-CHEV-USA
(1-800-243-8872), text telephone (TTY) users, call
1-888-889-2438.
Chevrolet reserves the right to limit services or
reimbursement to an owner or driver when, in
Chevrolet’s judgement, the claims become excessive in
frequency or type of occurrence.
Roadside Assistance is not part of or included in the
coverage provided by the New Vehicle Limited Warranty.
Chevrolet reserves the right to make any changes or
discontinue the Roadside Assistance program at
any time without notication.
Canadian Roadside Assistance
Vehicles purchased in Canada have an extensive
roadside assistance program accessible from anywhere
in Canada or the United States. Please refer to the
Warranty and Owner Assistance Information book.
Courtesy Transportation
To enhance your ownership experience, we and our
participating dealers are proud to offer Courtesy
Transportation, a customer support program for new
vehicles.
The Courtesy Transportation program is offered to
customers in conjunction with the Bumper-to-Bumper
coverage provided by the New Vehicle Limited Warranty.
Several transportation options are available when
warranty repairs are required. This will reduce your
inconvenience during warranty repairs.
Scheduling Service Appointments
When your vehicle requires warranty service, you should
contact your dealer and request an appointment. By
scheduling a service appointment and advising
your service consultant of your transportation needs,
your dealer can help minimize your inconvenience.
If your vehicle cannot be scheduled into the service
department immediately, keep driving it until it can be
scheduled for service, unless, of course, the problem is
safety-related. If it is, please call your dealership, let
them know this, and ask for instructions.
If the dealer requests that you simply drop the vehicle off
for service, you are urged to do so as early in the work
day as possible to allow for the same day repair.
7-7

B
Battery..........................................................5-41
Run-Down Protection...................................3-16
Before Leaving on a Long Trip.........................4-22
Boost Gage...................................................3-37
Brake
Anti-Lock Brake System (ABS)........................ 4-7
Emergencies................................................ 4-9
Parking......................................................2-27
System Warning Light..................................3-29
Brakes..........................................................5-38
Braking........................................................... 4-6
Braking in Emergencies..................................... 4-9
Break-In, New Vehicle.....................................2-17
Bulb Replacement...........................................5-49
Back-Up Lamps...........................................5-54
Center High-Mounted Stoplamp (CHMSL)........5-51
Halogen Bulbs............................................5-49
Headlamp Aiming........................................5-46
Headlamps, Front Turn Signal,
Sidemarker, and Parking Lamps.................5-50
Replacement Bulbs......................................5-55
Taillamps and Turn Signal Lamps..................5-52
Taillamps, Turn Signal, Stoplamps
and Back-up Lamps.................................5-53
Buying New Tires...........................................5-66
C
California Fuel.................................................. 5-6
California Proposition 65 Warning....................... 5-3
Canadian Owners................................................ ii
Capacities and Specications..........................5-107
Carbon Monoxide...........2-10, 2-32, 4-26, 4-39, 4-46
Care of
Safety Belts................................................5-91
Your CD Player...........................................3-72
Your CDs ...................................................3-72
Center Console Storage Area...........................2-37
Center High-Mounted Stoplamp (CHMSL)...........5-51
Chains, Tire...................................................5-72
Charging System Light....................................3-28
Check
Engine Light...............................................3-32
Checking Things Under the Hood......................5-10
Chemical Paint Spotting...................................5-95
Child Restraints
Child Restraint Systems...............................1-38
Infants and Young Children...........................1-34
Lower Anchors and Tethers for Children..........1-43
Older Children.............................................1-32
Securing a Child Restraint in
a Rear Seat Position................................1-48
Securing a Child Restraint in
the Right Front Seat Position.....................1-50
2

D
Daytime Running Lamps..................................3-14
Differential, Limited-Slip....................................4-11
Doing Your Own Service Work........................... 5-4
Dome Lamp...................................................3-15
Door
Automatic Door Lock..................................... 2-9
Delayed Locking........................................... 2-8
Locks.......................................................... 2-7
Power Door Locks......................................... 2-8
Programmable Automatic Door Unlock.............. 2-9
Rear Door Security Locks............................... 2-9
Driver
Position, Safety Belt.....................................1-18
Seat Height Adjuster...................................... 1-3
Driver Information Center (DIC).........................3-38
DIC Operation and Displays..........................3-38
DIC Vehicle Personalization..........................3-43
DIC Warnings and Messages........................3-40
Driver’s Storage Compartment..........................2-37
Driving
At Night.....................................................4-17
City...........................................................4-20
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Freeway.....................................................4-21
Hill and Mountain Roads..............................4-24
In Rain and on Wet Roads...........................4-18
Rocking Your Vehicle to Get it Out.................4-31
Winter........................................................4-26
E
Easy Entry Seat............................................... 1-8
Electrical System
Add-On Equipment......................................5-97
Engine Compartment Fuse Block.................5-101
Floor Console Fuse Block.............................5-99
Fuses and Circuit Breakers...........................5-98
Headlamp Wiring.........................................5-98
Power Windows and Other Power Options......5-98
Windshield Wiper Fuses...............................5-98
Engine
Air Cleaner/Filter.........................................5-21
Battery.......................................................5-41
Check and Service Engine Soon Light............3-32
Coolant......................................................5-24
Coolant Heater............................................2-22
Coolant Temperature Warning Light................3-32
Engine Compartment Overview......................5-12
Exhaust.....................................................2-32
Oil .............................................................5-15
Oil Life System...........................................5-20
Overheating................................................5-29
Starting......................................................2-20
Enhanced Traction System (ETS)........................ 4-9
Warning Light.............................................3-31
Entry/Exit Lighting...........................................3-16
Event Data Recorders (EDR)............................. 7-9
Extender, Safety Belt.......................................1-31
4

L
Labeling, Tire Sidewall.....................................5-58
Lamps
Battery Run-Down Protection.........................3-16
Dome........................................................3-15
Fog ...........................................................3-15
Mirror Reading............................................3-16
LATCH System
Child Restraints...........................................1-43
Light
Airbag Readiness........................................3-25
Anti-Lock Brake System Warning...................3-30
Brake System Warning.................................3-29
Charging System.........................................3-28
Engine Coolant Temperature Warning.............3-32
Enhanced Traction System (ETS)
Warning Light..........................................3-31
Fog Lamp..................................................3-36
Highbeam On.............................................3-36
Malfunction Indicator....................................3-32Light (cont.)
Oil Pressure...............................................3-35
Passenger Airbag Status Indicator..................3-26
Passenger Safety Belt Reminder....................3-25
Safety Belt Reminder...................................3-24
Security.....................................................3-36
Up-Shift.....................................................3-29
Lighting
Entry/Exit...................................................3-16
Limited-Slip Differential....................................4-11
Loading Your Vehicle.......................................4-31
Locks
Automatic Door Lock..................................... 2-9
Delayed Locking........................................... 2-8
Door........................................................... 2-7
Lockout Protection.......................................2-10
Power Door.................................................. 2-8
Programmable Automatic Door Unlock.............. 2-9
Rear Door Security Locks............................... 2-9
Loss of Control...............................................4-15
Lumbar
Manual Controls............................................ 1-3
7

Q
Questions and Answers About Safety Belts.........1-16
R
Racing or Other Competitive Driving..................4-17
Radios..........................................................3-48
Care of Your CD Player...............................3-72
Care of Your CDs........................................3-72
Radio with CD....................................3-50, 3-57
Setting the Time..........................................3-49
Theft-Deterrent............................................3-70
Understanding Reception..............................3-71
Rear Door Security Locks.................................. 2-9
Rear Safety Belt Comfort Guides......................1-28
Rear Seat Passengers, Safety Belts..................1-25
Rearview Mirror, Automatic
Dimming with OnStar
®.................................2-33
Rearview Mirrors.............................................2-33
Reclining Seatbacks.......................................... 1-4
Recommended Fluids and Lubricants.................6-12Recreational Vehicle Towing.............................4-36
Remote Keyless Entry System............................ 2-3
Remote Keyless Entry System, Operation............ 2-4
Removing the Flat Tire and
Installing the Spare Tire................................5-80
Removing the Spare Tire and Tools...................5-75
Replacement Bulbs.........................................5-55
Reporting Safety Defects
Canadian Government..................................7-14
General Motors...........................................7-14
United States Government............................7-13
Restraint System Check
Checking the Restraint Systems....................1-68
Replacing Restraint System Parts
After a Crash..........................................1-68
Retained Accessory Power (RAP)......................2-20
Right Front Passenger Position, Safety Belts......1-25
Roadside
Assistance Program....................................... 7-6
Rocking Your Vehicle to Get it Out....................4-31
Running the Engine While Parked.....................2-32
10