2007 CADILLAC STS V fuel cap

Engine Coolant Heater
Your vehicle may be equipped with an engine
coolant heater.
In very cold weather, 0°F (−18°C) or colder, the
engine coolant heater can help. You will get easier
starting and better fuel economy during engine
warm-up.
Usually, the coolant heater should be plugged in a
minimum of four hours prior to starting your
vehicle. At temperatures above 32°F (0°C), use of
the coolant heater is not required. Your vehicle
may also have an internal thermostat in the
plug end of the cord. This will prevent operation of
the engine coolant heater when the temperature
is at or above 0°F (−18°C) as noted on the cord.
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord.
For the 3.6L V6 engine, the cord is located in
the engine compartment on the passenger’s
side of the vehicle in front of the fuse block.
For the 4.6L V8 engine, the cord is located in
the engine compartment on the driver’s
side of the vehicle near the inner fender and
above the strut.
For the 4.4L V8 engine, the cord is located in
the front of the engine compartment, on
the passenger’s side of the vehicle. The plug
will be inside the upper grille cutout.
3. You must remove the plastic cap to access
the plug.
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This light should come on briey, as a check to
show you it is working, as you start the engine. If
the light does not come on, have it repaired.
This light will also come on during a malfunction in
one of two ways:
Light Flashing— A misre condition has
been detected. A misre increases vehicle
emissions and may damage the emission
control system on your vehicle. Diagnosis and
service may be required.
Light On Steady— An emission control
system malfunction has been detected on your
vehicle. Diagnosis and service may be
required.
If the Light Is Flashing
The following may prevent more serious damage
to your vehicle:
Reducing vehicle speed
Avoiding hard accelerations
Avoiding steep uphill grades
If the light stops ashing and remains on steady,
see “If the Light Is On Steady” following.If the light continues to ash, when it is safe to do
so, stop the vehicle. Find a safe place to park
your vehicle. Turn the engine off, wait at
least 10 seconds and restart the engine. If the
light remains on steady, see “If the Light Is
On Steady” following. If the light is still ashing,
follow the previous steps, and see your dealer for
service as soon as possible.
If the Light Is On Steady
You also may be able to correct the emission
system malfunction by considering the following:
Did you recently put fuel into your vehicle?
If so, reinstall the fuel cap, making sure to fully
install the cap. SeeFilling the Tank on page 368.
The diagnostic system can determine if the
fuel cap has been left off or improperly installed.
A loose or missing fuel cap will allow fuel to
evaporate into the atmosphere. A few driving trips
with the cap properly installed should turn the
light off.
253

Highbeam On Light
This light comes on
whenever the
high-beam headlamps
are on.
See “Intellibeam™ Intelligent High-Beam
Headlamp Control System” underHeadlamps on
page 211andHeadlamp High/Low-Beam
Changer on page 183for more information.
Fuel Gage
The fuel gage shows
approximately how
much fuel is in the tank.
It works only when
the engine is on.If the fuel supply gets low, the Fuel Level Low
message will appear on the DIC and a single
chime will sound. SeeDIC Warnings and
Messages on page 264for more information.
Here are a few concerns some owners have had
about the fuel gage. All of these situations are
normal and do not indicate that anything is wrong
with the fuel gage:
At the gas station the gas pump shuts off
before the gage reads full.
The gage may change when you turn, stop
quickly or accelerate quickly.
It takes a little more or less fuel to ll the tank
than the gage indicated. For example, the gage
may have indicated that the tank was half full,
but it actually took a little more or less than half
the tank’s capacity to ll the tank.
257

To help the generator recharge the battery quickly,
you can reduce the load on the electrical system
by turning off the accessories.
The normal battery voltage range is
11.5 to 15.5 volts. You can monitor battery voltage
on the DIC by pressing the information button
until you nd BATTERY VOLTS.
CHANGE ENGINE OIL SOON
This message displays when service is required
for your vehicle. See your dealer. SeeEngine
Oil on page 380andScheduled Maintenance on
page 505for more information.
When you reset the CHANGE ENGINE OIL
SOON message by clearing it from the display,
you still must reset the engine oil life system
separately. For more information on resetting the
engine oil life system, seeEngine Oil Life
System on page 383.
CHECK BRAKE FLUID
This message displays if the ignition is on to
inform the driver that the brake uid level is low.
Have the brake system serviced by your dealer as
soon as possible. SeeBrake System Warning
Light on page 248for more information.
CHECK GAS CAP
This message displays when the fuel cap has not
been fully tightened. Recheck the fuel cap to
ensure that it is on and tightened properly.
CHECK TIRE PRESSURE
If your vehicle has a Tire Pressure Monitor (TPM)
system, this message displays when the tire
pressure in one of the tires needs to be checked.
SeeDIC Controls and Displays on page 258
for more information on checking your vehicle’s
tire pressures. If a tire pressure message appears
on the DIC, stop as soon as you can. Have the
tire pressures checked and set to those shown on
the Tire Loading Information label. SeeTire
Pressure Monitor System on page 433and
Ination - Tire Pressure on page 431for more
information. If the tire pressure is low, the low tire
pressure warning light comes on. SeeLow Tire
Pressure Warning Light on page 249.
267

Service........................................................ 362
Accessories and Modications................... 363
California Proposition 65 Warning.............. 363
Doing Your Own Service Work.................. 364
Adding Equipment to the Outside of Your
Vehicle................................................... 365
Fuel............................................................. 365
Gasoline Octane........................................ 365
Gasoline Specications.............................. 366
California Fuel........................................... 366
Additives................................................... 367
Fuels in Foreign Countries........................ 368
Filling the Tank......................................... 368
Filling a Portable Fuel Container............... 371
Checking Things Under the Hood.............. 372
Hood Release........................................... 372
Engine Compartment Overview.................. 373
Engine Oil................................................. 380
Engine Oil Life System.............................. 383
Supercharger Oil....................................... 385
Engine Air Cleaner/Filter............................ 386
Automatic Transmission Fluid.................... 388Engine Coolant.......................................... 389
Coolant Surge Tank Pressure Cap............ 393
Engine Overheating................................... 393
Overheated Engine Protection
Operating Mode..................................... 395
Cooling System......................................... 396
Power Steering Fluid ................................. 403
Windshield Washer Fluid........................... 404
Brakes...................................................... 405
Battery...................................................... 408
Jump Starting............................................ 408
All-Wheel Drive........................................... 414
Rear Axle.................................................... 416
Front Axle................................................... 417
Bulb Replacement....................................... 417
High Intensity Discharge (HID) Lighting..... 418
Halogen Bulbs........................................... 418
Back-Up Lamps......................................... 418
Replacement Bulbs................................... 419
Windshield Replacement............................ 419
Windshield Wiper Blade Replacement....... 419
Section 5 Service and Appearance Care
359

The tethered fuel cap
is located behind a
hinged fuel door on the
passenger’s side of
the vehicle.
To open the fuel door, apply pressure in the
center of the rear edge of the fuel door and it will
pop open.
To remove the fuel cap, turn it slowly
counterclockwise. The fuel cap has a spring in it;
if the cap is released too soon, it will spring back to
the right.
While refueling, hang the tethered fuel cap from
the hook on the fuel door.
{CAUTION:
If you spill fuel and then something
ignites it, you could be badly burned. Fuel
can spray out on you if you open the fuel
cap too quickly. This spray can happen if
your tank is nearly full, and is more likely
in hot weather. Open the fuel cap slowly
and wait for any hiss noise to stop. Then
unscrew the cap all the way.
Be careful not to spill fuel. Do not top off or overll
the tank, and wait a few seconds after you have
nished pumping before removing the nozzle.
Clean fuel from painted surfaces as soon as
possible. SeeWashing Your Vehicle on page 480.
369

When replacing the fuel cap, turn it clockwise until
it clicks. Make sure the cap is fully installed.
The diagnostic system can determine if the fuel
cap has been left off or improperly installed.
This would allow fuel to evaporate into the
atmosphere. SeeMalfunction Indicator Lamp on
page 252.
The CHECK GAS CAP message will appear on
the Driver Information Center (DIC) display if
the fuel cap is not reinstalled properly. SeeDIC
Warnings and Messages on page 264for
more information.
{CAUTION:
If a re starts while you are refueling, do
not remove the nozzle. Shut off the ow of
fuel by shutting off the pump or by
notifying the station attendant. Leave the
area immediately.
Notice:If you need a new fuel cap, be sure to
get the right type. Your dealer can get one
for you. If you get the wrong type, it may not
t properly. This may cause your malfunction
indicator lamp to light and may damage
your fuel tank and emissions system. See
Malfunction Indicator Lamp on page 252.
370

Cold Tire Pressure:The amount of air pressure
in a tire, measured in pounds per square inch
(psi) or kilopascals (kPa) before a tire has built up
heat from driving. SeeInation - Tire Pressure
on page 431.
Curb Weight:This means the weight of a motor
vehicle with standard and optional equipment
including the maximum capacity of fuel, oil, and
coolant, but without passengers and cargo.
DOT Markings:A code molded into the sidewall
of a tire signifying that the tire is in compliance
with the U.S. Department of Transportation (DOT)
motor vehicle safety standards. The DOT code
includes the Tire Identication Number (TIN),
an alphanumeric designator which can also identify
the tire manufacturer, production plant, brand,
and date of production.
GVWR:Gross Vehicle Weight Rating. See
Loading Your Vehicle on page 349.
GAWR FRT:Gross Axle Weight Rating for the
front axle. SeeLoading Your Vehicle on page 349.GAWR RR:Gross Axle Weight Rating for the rear
axle. SeeLoading Your Vehicle on page 349.
Intended Outboard Sidewall:The side of
an asymmetrical tire, that must always face
outward when mounted on a vehicle.
Kilopascal (kPa):The metric unit for air pressure.
Light Truck (LT-Metric) Tire:A tire used on
light duty trucks and some multipurpose passenger
vehicles.
Load Index:An assigned number ranging from
1 to 279 that corresponds to the load carrying
capacity of a tire.
Maximum Ination Pressure:The maximum air
pressure to which a cold tire may be inated.
The maximum air pressure is molded onto
the sidewall.
Maximum Load Rating:The load rating for a tire
at the maximum permissible ination pressure
for that tire.
427