ECU CADILLAC CTS 2009 2.G Service Manual

Pulling A Trailer
Here are some important points:
There are many different laws, including speed limit
restrictions, having to do with trailering. Make sure
the rig will be legal, not only where you live but
also where you will be driving. A good source for
this information can be state or provincial police.
Do not tow a trailer at all during the rst 1,000 miles
(1 600 km) the new vehicle is driven. The engine,
axle or other parts could be damaged.
Then, during the rst 500 miles (800 km) that a
trailer is towed, do not drive over 50 mph (80 km/h)
and do not make starts at full throttle. This helps
the engine and other parts of the vehicle wear in at
the heavier loads.
Vehicles with automatic transmissions can tow in
D (Drive). Shift the transmission to a lower gear
if the transmission shifts too often under heavy
loads and/or hilly conditions. For vehicles with a
manual transmission, it is better not to use the
highest gear.
Obey speed limit restrictions when towing a trailer.
Do not drive faster than the maximum posted speed
for trailers, or no more than 55 mph (90 km/h), to
save wear on the vehicle’s parts.Three important considerations have to do with weight:
The weight of the trailer.
The weight of the trailer tongue.
The total weight on the vehicle’s tires.
Weight of the Trailer
How heavy can a trailer safely be?
It should never weigh more than 1,000 lbs (450 kg).
But even that can be too heavy.
It depends on how the rig is used. For example, speed,
altitude, road grades, outside temperature and how
much the vehicle is used to pull a trailer are all
important. It can depend on any special equipment on
the vehicle, and the amount of tongue weight the vehicle
can carry. See “Weight of the Trailer Tongue” later in
this section for more information.
Maximum trailer weight is calculated assuming only the
driver is in the tow vehicle and it has all the required
trailering equipment. The weight of additional optional
equipment, passengers and cargo in the tow vehicle
must be subtracted from the maximum trailer weight.
Ask your dealer/retailer for our trailering information
or advice, or write us at our Customer Assistance
Offices. SeeCustomer Assistance Offices on page 7-6
for more information.
4-29

Driving with a Trailer
Towing a trailer requires a certain amount of experience.
Get to know the rig before setting out for the open
road. Get acquainted with the feel of handling and
braking with the added weight of the trailer. And always
keep in mind that the vehicle you are driving is now
longer and not as responsive as the vehicle is by itself.
Before starting, check all trailer hitch parts and
attachments, safety chains, electrical connectors, lamps,
tires and mirror adjustments. If the trailer has electric
brakes, start the vehicle and trailer moving and
then apply the trailer brake controller by hand to be sure
the brakes are working. This checks the electrical
connection at the same time.
During the trip, check occasionally to be sure that the
load is secure, and that the lamps and any trailer brakes
are still working.
Following Distance
Stay at least twice as far behind the vehicle ahead as
you would when driving the vehicle without a trailer.
This can help to avoid situations that require heavy
braking and sudden turns.
Passing
More passing distance is needed when towing a trailer.
Because the rig is longer, it is necessary to go much
farther beyond the passed vehicle before returning to
the lane.
Backing Up
Hold the bottom of the steering wheel with one hand.
Then, to move the trailer to the left, move that hand
to the left. To move the trailer to the right, move your
hand to the right. Always back up slowly and, if possible,
have someone guide you.
Making Turns
Notice:Making very sharp turns while trailering
could cause the trailer to come in contact with
the vehicle. The vehicle could be damaged.
Avoid making very sharp turns while trailering.
When turning with a trailer, make wider turns than
normal. Do this so the trailer will not strike soft
shoulders, curbs, road signs, trees or other objects.
Avoid jerky or sudden maneuvers. Signal well in
advance.
4-32

3. Fill the coolant surge tank with the proper mixture,
to slightly above the FROID/FULL COLD line on the
side of the coolant surge tank.4. With the coolant surge tank pressure cap off, start
the engine and let it run until you can feel the upper
radiator hose getting hot. The upper radiator
hose is the top hose coming out of the radiator, on
the passenger side of the vehicle. Watch out for
the engine cooling fans.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower, add
more of the proper mixture to the coolant surge tank
until the level reaches the FROID/FULL COLD
line on the side of the coolant surge tank.
5. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
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.
Recheck the coolant level in the bottle next time you
use your vehicle to insure the system is full when cold.
SeeEngine Coolant on page 5-32.
5-35

3. Add the proper DEX-COOL®coolant mixture to the
ll neck until the coolant reaches the COLD FILL
line on the ll neck.
With the intercooler system pressure cap off, start
the engine and let it run for a couple of minutes.
Then turn the engine off. By this time, the coolant
level inside the ll neck may be lower. If the
level drops to where coolant is no longer visible in
the horizontal tube section of the ll neck, with
the engine off add more of the DEX-COOL
®coolant
mixture to the ll neck until the level is again
visible in the horizontal tube section.
4. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
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.
If the coolant is not at the proper level when the system
cools down again, see your dealer/retailer.
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 5-14for more
information on location.
Engine Overheating
The vehicle has several indicators to warn of engine
overheating.
There are two engine hot messages that may be
displayed in the Driver Information Center (DIC).
SeeDIC Warnings and Messages on page 3-58for
more information.
You may decide not to lift the hood when this warning
appears, but instead get service help right away.
SeeRoadside Service on page 7-7.
5-37

Coverage
Services are provided up to 5 years/100,000 miles
(160 000 km), whichever comes rst.
In the U.S., anyone driving the vehicle is covered.
In Canada, a person driving the vehicle without
permission from the owner is not covered.
Roadside Assistance is not a part of the New Vehicle
Limited Warranty. Cadillac and General Motors of
Canada Limited reserve the right to make any changes
or discontinue the Roadside Assistance program at
any time without notication.
Cadillac and General Motors of Canada Limited reserve
the right to limit services or payment to an owner or
driver if they decide the claims are made too often, or
the same type of claim is made many times.
Cadillac Owner Privileges™
Emergency Fuel Delivery:Delivery of enough fuel
for the vehicle to get to the nearest service station.
Lock-Out Service:Service is provided to unlock the
vehicle if you are locked out. A remote unlock may be
available if you have OnStar
®. For security reasons,
the driver must present identication before this
service is given.
Emergency Tow From a Public Road or Highway:
Tow to the nearest Cadillac dealer for warranty
service, or if the vehicle was in a crash and cannot
be driven. Assistance is also given when the vehicle
is stuck in the sand, mud, or snow.
Flat Tire Change:Service is provided to change a
at tire with spare tire. The spare tire, if equipped,
must be in good condition and properly inated. It is
your responsibility for the repair or replacement of
the tire if it is not covered by the warranty.
Battery Jump Start:Service is provided to jump
start a dead battery.
Trip Routing Service:Detailed maps of North
America are provided when requested either with the
most direct route or the most scenic route. Additional
travel information is also available. Allow three
weeks for delivery.
Trip Interruption Benets and Assistance:
If your trip is interrupted due to a warranty failure,
incidental expenses may be reimbursed during the
5 year/100,000 miles (160 000 km) Powertrain
warranty period. Items considered are hotel, meals,
and rental car.
7-8

OnStar®
If your vehicle has OnStar and you subscribe to the
OnStar services, please refer to the OnStar Terms and
Conditions for information on data collection and use.
See alsoOnStar
®System on page 2-56in this manual
for more information.
Navigation System
If your vehicle has a navigation system, use of the
system may result in the storage of destinations,
addresses, telephone numbers, and other trip
information. Refer to the navigation system operating
manual for information on stored data and for deletion
instructions.
Radio Frequency
Identication (RFID)
RFID technology is used in some vehicles for functions
such as tire pressure monitoring and ignition system
security, as well as in connection with conveniences
such as key fobs for remote door locking/unlocking and
starting, and in-vehicle transmitters for garage door
openers. RFID technology in GM vehicles does not use
or record personal information or link with any other
GM system containing personal information.
7-18

Chemical Paint Spotting.................................5-113
Child Restraints
Child Restraint Systems...............................1-41
Infants and Young Children...........................1-37
Lower Anchors and Tethers for Children..........1-45
Older Children.............................................1-34
Securing a Child Restraint in a
Rear Seat Position...................................1-51
Securing a Child Restraint in the
Right Front Seat Position..........................1-54
Where to Put the Restraint...........................1-44
Cigarette Lighter.............................................3-23
Cleaning
Aluminum or Chrome-Plated Wheels.............5-112
Exterior Lamps/Lenses................................5-110
Fabric/Carpet............................................5-107
Finish Care...............................................5-110
Instrument Panel, Vinyl, and Other
Plastic Surfaces.....................................5-108
Interior.....................................................5-106
Leather....................................................5-108
Speaker Covers.........................................5-109
Tires........................................................5-113
Underbody Maintenance.............................5-113
Washing Your Vehicle.................................5-110
Weatherstrips............................................5-109
Windshield and Wiper Blades......................5-111
Wood Panels............................................5-109Climate Control System
Air Filter, Passenger Compartment.................3-29
Dual ..........................................................3-24
Outlet Adjustment........................................3-29
Clock............................................................3-23
Clutch, Hydraulic.............................................5-30
Collision Damage Repair..................................7-11
Compact Spare Tire......................................5-105
Compass.......................................................3-56
Competitive Driving.........................................4-13
Compressor Kit
Storing.......................................................5-95
Compressor Kit, Tire Sealant............................5-86
Control of a Vehicle.......................................... 4-3
Convenience Net............................................2-65
Coolant
Engine.......................................................5-32
Engine Temperature Gage............................3-42
Engine Temperature Warning Light.................3-41
Surge Tank Pressure Cap.............................5-37
Cooling System..............................................5-31
Cruise Control................................................3-14
Cruise Control Light........................................3-48
Cupholders....................................................2-64
Customer Assistance Information
Courtesy Transportation................................7-10
Customer Assistance for
Text Telephone (TTY) Users........................ 7-6
3

Customer Assistance Information (cont.)
Customer Assistance Offices........................... 7-6
Customer Satisfaction Procedure..................... 7-2
GM Mobility Reimbursement Program............... 7-7
Reporting Safety Defects to General Motors....7-15
Reporting Safety Defects to the
Canadian Government..............................7-15
Reporting Safety Defects to the
United States Government.........................7-14
Roadside Service.......................................... 7-7
Service Publications Ordering Information........7-15
D
Daytime Running Lamp...................................3-18
Defensive Driving............................................. 4-2
Delayed Locking.............................................2-17
DIC Compass.................................................3-56
Disc, MP3....................................................3-108
Doing Your Own Service Work........................... 5-4
Door
Central Door Unlocking System.....................2-16
Delayed Locking..........................................2-17
Locks........................................................2-16
Power Door Locks.......................................2-17
Programmable Automatic Door Locks.............2-17
Rear Door Security Locks.............................2-18Driver Information Center (DIC).........................3-50
DIC Operation and Displays..........................3-51
DIC Vehicle Customization............................3-72
DIC Warnings and Messages........................3-58
Driving
At Night.....................................................4-13
Before a Long Trip......................................4-15
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Highway Hypnosis.......................................4-15
Hill and Mountain Roads..............................4-16
In Rain and on Wet Roads...........................4-14
Rocking Your Vehicle to Get it Out.................4-20
Winter........................................................4-17
Dual Climate Control System............................3-24
E
EDR .............................................................7-16
Electric Parking Brake.....................................2-44
Electrical System
Add-On Equipment.....................................5-114
Fuses and Circuit Breakers.........................5-115
Power Windows and Other Power Options....5-115
Rear Compartment Fuse Block..........5-122, 5-124
Underhood Fuse Block......................5-115, 5-119
Windshield Wiper Fuses.............................5-115
4

I
Ignition Positions....................................2-31, 2-32
Immobilizer....................................................2-27
Immobilizer Operation..............................2-28, 2-29
Infants and Young Children, Restraints...............1-37
Ination - Tire Pressure...................................5-69
Inator Kit, Tire...............................................5-86
Instrument Panel
Brightness..................................................3-20
Cluster.......................................................3-31
Overview..................................................... 3-4
Storage Area..............................................2-65
J
Jump Starting.................................................5-46
K
Keyless Access System..................................... 2-8
Keyless Access System, Operation...................... 2-8
Keyless Entry System....................................... 2-5
Keys............................................................... 2-3
L
Labeling, Tire Sidewall.....................................5-63
Lamp
Malfunction Indicator....................................3-43
Lamps
Exterior Lighting Battery Saver......................3-20
Reading.....................................................3-21
Lap-Shoulder Belt...........................................1-28
LATCH System for Child Restraints...................1-45
License Plate Lamps.......................................5-59
Light
Airbag Readiness........................................3-36
Antilock Brake System (ABS) Warning............3-40
Brake System Warning.................................3-39
Charging System.........................................3-38
Cruise Control.............................................3-48
Engine Coolant Temperature Warning.............3-41
Fog Lamp ..................................................3-48
Highbeam On.............................................3-49
Lights On Reminder.....................................3-48
Oil Pressure...............................................3-46
Passenger Airbag Status Indicator..................3-37
Safety Belt Reminders..................................3-35
Security.....................................................3-48
7

Light (cont.)
StabiliTrak®/Traction Control System (TCS)
Warning Light..........................................3-41
Tire Pressure..............................................3-42
Up-Shift.....................................................3-38
Lighting
Entry.........................................................3-20
Parade Dimming..........................................3-20
Lights............................................................3-17
Flash-to-Pass............................................... 3-9
High/Low Beam Changer................................ 3-8
On Reminder..............................................3-17
Limited-Slip Rear Axle....................................... 4-9
Loading Your Vehicle.......................................4-20
Lockout Protection..........................................2-19
Locks
Central Door Unlocking System.....................2-16
Delayed Locking..........................................2-17
Door ..........................................................2-16
Lockout Protection.......................................2-19
Power Door ................................................2-17
Programmable Automatic Door Locks.............2-17
Rear Door Security Locks.............................2-18
Loss of Control...............................................4-11
Lower Anchors and Tethers for Children.............1-45
Lumbar
Power and Side Bolsters................................ 1-6
Power Controls............................................. 1-6M
Magnetic Ride Control....................................... 4-8
Maintenance Schedule
Additional Required Services........................... 6-6
At Each Fuel Fill.........................................6-11
At Least Once a Month................................6-11
At Least Once a Year..................................6-12
Introduction.................................................. 6-2
Maintenance Footnotes.................................. 6-8
Maintenance Record....................................6-18
Maintenance Replacement Parts....................6-16
Maintenance Requirements............................. 6-2
Owner Checks and Services.........................6-10
Recommended Fluids and Lubricants.............6-14
Scheduled Maintenance................................. 6-4
Using.......................................................... 6-3
Your Vehicle and the Environment................... 6-2
Malfunction Indicator Lamp...............................3-43
Manual Seats................................................... 1-4
Manual Transmission
Fluid..........................................................5-29
Operation...................................................2-40
Memory Seat, Mirrors, Steering Wheel Controls.... 1-8
Message
DIC Warnings and Messages........................3-58
8