2006 CADILLAC CTS heating

Adding Coolant
If you need more coolant, add the proper DEX-COOL®
coolant mixture at the surge tank, but only when the
engine is cool.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Do not spill coolant on a hot engine.
When replacing the pressure cap, make sure it is
hand-tight and fully seated.
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
There are three engine hot messages that may be
displayed in the Driver Information Center (DIC).
SeeDIC Warnings and Messages on page 3-61for
more information.
5-28

If the engine is warm or hot, the coolant level should be
at or above the FULL COLD/FROID line on the side
of the coolant surge tank. If the engine is cold, the
coolant level should be near the FULL COLD/FROID
line on the side of the coolant surge tank. If it is not,
you may have a leak at the pressure cap or in the
radiator hoses, heater hoses, radiator, water pump
or somewhere else in the cooling system.
{CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Do not touch them.
If you do, you can be burned.
Do not run the engine if there is a leak. If you
run the engine, it could lose all coolant. That
could cause an engine re, and you could be
burned. Get any leak xed before you drive
the vehicle.If there seems to be no leak, with the engine on, check
to see if the electric engine cooling fans are running.
If the engine is overheating, both fans should be
running. If they are not, your vehicle needs service.
Notice:Engine damage from running your engine
without coolant is not covered by your warranty. See
Overheated Engine Protection Operating Mode on
page 5-30for information on driving to a safe place
in an emergency.
Notice:Using coolant other than DEX-COOL
®may
cause premature engine, heater core, or radiator
corrosion. In addition, the engine coolant could
require changing sooner, at 30,000 miles (50 000 km)
or 24 months, whichever occurs rst. Any repairs
would not be covered by your warranty. Always use
DEX-COOL
®(silicate-free) coolant in your vehicle.
5-32

Tires
Your new vehicle comes with high-quality tires made by
a leading tire manufacturer. If you ever have questions
about your tire warranty and where to obtain service,
see your GM Warranty booklet for details. For additional
information refer to the tire manufacturer’s booklet
included with your vehicle’s Owner’s Manual.
{CAUTION:
Poorly maintained and improperly used
tires are dangerous.
Overloading your tires can cause
overheating as a result of too much
friction. You could have an air-out and
a serious accident. SeeLoading Your
Vehicle on page 4-32.
Underinated tires pose the same danger
as overloaded tires. The resulting accident
could cause serious injury. Check all tires
frequently to maintain the recommended
pressure. Tire pressure should be checked
when your tires are cold.
CAUTION: (Continued)
CAUTION: (Continued)

Overinated tires are more likely to be
cut, punctured, or broken by a sudden
impact — such as when you hit a pothole.
Keep tires at the recommended pressure.
Worn, old tires can cause accidents.
If your tread is badly worn, or if your
tires have been damaged, replace them.
SeeInflation - Tire Pressure on page 5-65
for ination pressure adjustment for high
speed driving.
Notice:If your vehicle has 245/45R18, P245/45ZR18
or P225/50R18 size tires, they are classied as
low-prole tires. Low-prole tires are more
susceptible to damage from road hazards or curb
impact than standard prole tires. Tire and or
wheel assembly damage can occur when coming
into contact with road hazards like, potholes, or
sharp edged objects or when sliding into a curb.
Your GM warranty does not cover this type of
damage. Keep tires set to the correct ination
pressure and when possible avoid contact with
curbs, potholes and other road hazards.
5-57

Engine (cont.)
Check Oil Pressure Message........................3-51
Coolant......................................................5-26
Coolant Heater............................................2-26
Coolant Temperature Gage...........................3-40
Coolant Temperature Warning Light................3-40
Drive Belt Routing.......................................6-16
Engine Compartment Overview......................5-12
Exhaust.....................................................2-37
Oil .............................................................5-16
Oil Life System...........................................5-20
Oil Temperature Warning Message.................3-51
Overheated Protection Operating Mode...........5-30
Overheating................................................5-28
Speed Limiter.............................................3-33
Starting......................................................2-25
Entry Lighting.................................................3-21
Event Data Recorders (EDR)............................7-11
Extender, Safety Belt.......................................1-29
Exterior Lighting Battery Saver..........................3-20
F
Filter
Engine Air Cleaner......................................5-21
Finish Damage.............................................5-101
Flashers, Hazard Warning.................................. 3-6Flash-to-Pass.................................................3-10
Flat Tire........................................................5-82
Flat Tire, Changing.........................................5-84
Flat Tire, Storing.............................................5-93
Fluid
Automatic Transmission................................5-23
Manual Transmission....................................5-24
Power Steering...........................................5-36
Windshield Washer......................................5-37
Fog Lamp Light..............................................3-45
Fog Lamps ....................................................3-19
Folding Rear Seat............................................ 1-9
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-6
Filling a Portable Fuel Container....................5-10
Filling Your Tank........................................... 5-8
Fuels in Foreign Countries.............................. 5-7
Gage .........................................................3-46
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-6
Fuses
Fuses and Circuit Breakers.........................5-104
Rear Underseat Fuse Block.........................5-109
Underhood Fuse Block...............................5-105
Windshield Wiper.......................................5-104
5