2007 CADILLAC SRX cooling

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, and
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’re pulling a trailer. SeeScheduled
Maintenance on page 471for more information.
Things that are especially important in trailer
operation are automatic transmission uid (don’t
overll), engine oil, axle lubricant, 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’re trailering, it’s
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 372.
341

Service........................................................ 346
Accessories and Modications................... 347
California Proposition 65 Warning.............. 347
Doing Your Own Service Work.................. 348
Adding Equipment to the Outside of
Your Vehicle.......................................... 348
Fuel............................................................. 349
Gasoline Octane........................................ 349
Gasoline Specications.............................. 350
California Fuel........................................... 350
Additives................................................... 350
Fuels in Foreign Countries........................ 351
Filling the Tank......................................... 352
Filling a Portable Fuel Container............... 354
Checking Things Under the Hood.............. 354
Hood Release........................................... 355
Engine Compartment Overview.................. 356
Engine Oil................................................. 360
Engine Oil Life System.............................. 363
Engine Air Cleaner/Filter............................ 365Automatic Transmission Fluid.................... 367
Engine Coolant.......................................... 368
Coolant Surge Tank Pressure Cap............ 371
Engine Overheating................................... 372
Overheated Engine Protection
Operating Mode..................................... 374
Cooling System......................................... 374
Power Steering Fluid ................................. 379
Windshield Washer Fluid........................... 380
Brakes...................................................... 381
Battery...................................................... 385
Jump Starting............................................ 386
All-Wheel Drive........................................... 392
Rear Axle.................................................... 394
Front Axle................................................... 395
Bulb Replacement....................................... 396
High Intensity Discharge (HID) Lighting..... 396
Halogen Bulbs........................................... 396
Windshield Wiper Blade Replacement....... 397
Section 5 Service and Appearance Care
343

A. Underhood Fuse Block. SeeUnderhood Fuse
Block on page 455.
B. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 380.
C. Battery. SeeBattery on page 385.
D. Passenger Compartment Air Filter. See
Passenger Compartment Air Filter on page 195.
E. Power Steering Fluid Reservoir. SeePower
Steering Fluid on page 379.
F. Engine Oil Fill Cap. See “When to Add Engine
Oil” underEngine Oil on page 360.G. Engine Oil Dipstick (Out of View). See
“Checking Engine Oil” underEngine Oil on
page 360.
H. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 381.
I. Engine Coolant Surge Tank and Pressure Cap.
SeeCoolant Surge Tank Pressure Cap on
page 371andCooling System on page 374.
J. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 365.
357

A. Underhood Fuse Block. SeeUnderhood Fuse
Block on page 455.
B. Battery. SeeBattery on page 385.
C. Passenger Compartment Air Filter. See
Passenger Compartment Air Filter on page 195.
D. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 380.
E. Power Steering Fluid Reservoir. SeePower
Steering Fluid on page 379.
F. Engine Oil Fill Cap. See “When to Add Engine
Oil” underEngine Oil on page 360.G. Engine Oil Dipstick (Out of View). See
“Checking Engine Oil” underEngine Oil on
page 360.
H. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 381.
I. Engine Coolant Surge Tank and Pressure Cap.
SeeCoolant Surge Tank Pressure Cap on
page 371andCooling System on page 374.
J. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 365.
359

Engine Coolant
The cooling system in your vehicle is lled with
DEX-COOL®engine coolant. This coolant is
designed to remain in your vehicle for ve years or
150,000 miles (240 000 km), whichever occurs
rst, if you add only DEX-COOL
®extended
life coolant.
The following explains your cooling system and
how to add coolant when it is low. If you have
a problem with engine overheating, seeEngine
Overheating on page 372.A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
Give freezing protection down to
−34°F (−37°C).
Give boiling protection up to 265°F (129°C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Allow the warning lights and gages to work as
they should.
Notice:Using coolant other than DEX-COOL
®
may cause premature engine, heater core, or
radiator corrosion. In addition, the engine
coolant may require changing sooner, at the
rst maintenance service after each
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.
368

What to Use
Use a mixture of one-half clean, drinkable water
and one-half DEX-COOL®coolant which will
not damage aluminum parts. If you use this coolant
mixture, you do not need to add anything else.
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can
boil before the proper coolant mixture will.
Your vehicle’s coolant warning system is
set for the proper coolant mixture. With
plain water or the wrong mixture, your
engine could get too hot but you would
not get the overheat warning. Your engine
could catch re and you or others could
be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
®coolant.Notice:If you use an improper coolant
mixture, your engine could overheat and be
badly damaged. The repair cost would not be
covered by your warranty. Too much water
in the mixture can freeze and crack the engine,
radiator, heater core, and other parts.
If you have to add coolant more than once or
twice a year, have your dealer check your
cooling system.
Notice:If you use extra inhibitors and/or
additives in your vehicle’s cooling system, you
could damage your vehicle. Use only the
proper mixture of the engine coolant listed in
this manual for the cooling system. See
Recommended Fluids and Lubricants on
page 480for more information.
369

Overheated Engine Protection
Operating Mode
This operating mode allows your vehicle to be
driven to a safe place in an emergency. Should an
hot engine condition exist, an overheat protection
mode which alternates ring groups of cylinders
helps prevent engine damage. In this mode, there is
a loss in power and engine performance. Driving
extended miles (km) and/or towing a trailer in the
overheat protection mode should be avoided.
Notice:After driving in the overheated engine
protection operating mode, to avoid engine
damage, allow the engine to cool before
attempting any repair. The engine oil will be
severely degraded. Repair the cause of coolant
loss and change the oil. SeeEngine Oil on
page 360.
Cooling System
When you decide it is safe to lift the hood, here is
what you will see:
A. Electric Engine Cooling Fans
B. Coolant Surge Tank and Pressure Cap
Some vehicles may be equipped with an
engine driven fan, as well as the electric
pusher fans (A) which are located behind the
vehicle’s grille.
3.6L V6 shown, 4.6L V8 similar
374

{CAUTION:
An electric engine cooling fan under the
hood can start up even when the engine
is not running and can injure you. Keep
hands, clothing, and tools away from any
underhood electric fan.
If the coolant inside the coolant surge tank is
boiling, do not do anything else until it cools down.
The vehicle should be parked on a level surface.
When the engine is cold, the coolant level should
be at or slightly above 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. SeeOverheated Engine Protection
Operating Mode on page 374for information on
driving to a safe place in an emergency.
375