Page 365 of 528

Black plate (15,1)Cadillac STS Owner Manual - 2011
After you have removed the sight shields (if equipped):A. Underhood Fuse Block. See Underhood Fuse
Block on page 6‑116.
B. Remote Negative (-) Terminal. See Jump Starting
on page 6‑38.
C. Remote Positive (+) Terminal. See Jump Starting
on page 6‑38.
D. Battery. See Battery on page 6‑38.
E. Passenger Compartment Air Filter. See Passenger
Compartment Air Filter on page 4‑50.
F. Power Steering Fluid Reservoir. See Power
Steering Fluid on page 6‑33.
G. Engine Oil Fill Cap. See “When to Add Engine Oil”
under Engine Oil on page 6‑16.
H. Engine Oil Dipstick (Out of View). See “Checking
Engine Oil” underEngine Oil on page 6‑16. I. Brake Master Cylinder Reservoir. See
“Brake
Fluid” under Brakes on page 6‑35.
J. Engine Coolant Surge Tank and Pressure Cap. See Cooling System on page 6‑24.
K. Engine Air Cleaner/Filter. See Engine Air Cleaner/
Filter on page 6‑21.
L. Windshield Washer Fluid Reservoir. See “Adding
Washer Fluid” underWindshield Washer Fluid
on
page 6‑34.
If your vehicle is equipped with front compartment
underhood sight shields, before closing the hood be
sure to reinstall the sight shields. To reinstall the
shields, locate the tabs on the left and right sides and
insert them into the openings in the tower to tower
brace. Then insert the fasteners into the top of the
shield and push the fasteners back into place.
6-15
Page 381 of 528

Black plate (31,1)Cadillac STS Owner Manual - 2011
If Steam Is Coming From The Engine
Compartment
{WARNING:
Steam from an overheated engine can burn you
badly, even if you just open the hood. Stay away
from the engine if you see or hear steam coming
from it. Turn it off and get everyone away from the
vehicle until it cools down. Wait until there is no
sign of steam or coolant before you open
the hood.
If you keep driving when the vehicles engine is
overheated, the liquids in it can catch fire. You or
others could be badly burned. Stop the engine if it
overheats, and get out of the vehicle until the
engine is cool.
SeeOverheated Engine Protection Operating
Mode
on page 6‑32for information on driving to
a safe place in an emergency.
If No Steam Is Coming From The
Engine Compartment
An overheat warning, can indicate a serious problem.
If an engine overheat warning is displayed but no steam
can be seen or heard, the problem may not be too
serious. Sometimes the engine can get a little too hot
when the vehicle:
.Climbs a long hill on a hot day.
.Stops after high-speed driving.
.Idles for long periods in traffic.
.Tows a trailer.
If the overheat warning is displayed with no sign of
steam: 1. Turn the air off.
2. Turn the heater on to the highest temperature and to the highest fan speed. Open the windows as
necessary.
3. In heavy traffic, let the engine idle in N (Neutral) while stopped. If it is safe to do so, pull off the
road, shift to P (Park) or N (Neutral) and let the
engine idle.
6-31
Page 389 of 528

Black plate (39,1)Cadillac STS Owner Manual - 2011
Notice:Ignoring these steps could result in costly
damage to the vehicle that would not be covered by
the warranty.
Trying to start the vehicle by pushing or pulling it
will not work, and it could damage the vehicle.
1. Check the other vehicle. It must have a 12-volt battery with a negative ground system.
Notice: If the other vehicle's system is not a 12-volt
system with a negative ground, both vehicles can
be damaged. Only use vehicles with 12-volt systems
with negative grounds to jump start your vehicle.
2. Get the vehicles close enough so the jumper cables can reach, but be sure the vehicles are not
touching each other. If they are, it could cause a
ground connection you do not want. You would not
be able to start your vehicle and the bad grounding
could damage the electrical systems.
To avoid the possibility of the vehicles rolling, set
the parking brake firmly on both vehicles involved
in the jump start procedure. Put an automatic
transmission in P (Park) or a manual transmission
in NEUTRAL before setting the parking brake. Notice:
If you leave the radio or other accessories
on during the jump starting procedure, they could
be damaged. The repairs would not be covered by
the warranty. Always turn off the radio and other
accessories when jump starting the vehicle.
3. Turn off the ignition on both vehicles. Unplug unnecessary accessories plugged into the
cigarette lighter or the accessory power outlets.
Turn off the radio and all lamps that are not
needed. This will avoid sparks and help save both
batteries. And it could save the radio!
4. Open the hoods and locate the positive (+) and negative (−) terminal locations or the remote
positive (+) and remote negative (−) terminals of
the other vehicle. Then locate the remote
positive (+) location on your vehicle. See Engine
Compartment Overview
on page 6‑13for more
information on locations the terminals.
6-39
Page 520 of 528

Black plate (6,1)Cadillac STS Owner Manual - 2011
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
California Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Filling a Portable Fuel Container . . . . . . . . . . . . . . . . . . 6-11
Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Fuels in Foreign Countries . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Gasoline Octane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Gasoline Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-68
Fuel Economy Driving for Better . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Fuses Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . 6-115
Rear Underseat Fuse Block . . . . . . . . . . . . . . . . . . . . .6-120
Underhood Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . . . 6-116
Windshield Wiper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-115
G
Garage Door Opener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-49
GasolineOctane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7 Gauges
Engine Coolant Temperature . . . . . . . . . . . . . . . . . . . . . 4-61
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-68
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-53
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-53
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-56
GM Mobility Reimbursement Program . . . . . . . . . . . . . . .8-7
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-47
Hazard Warning Flashers . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Head-Up Display (HUD) . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-38
Headlamp Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-115
Headlamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-27 Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-46
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-47
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . . 4-32
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
High Intensity Discharge (HID) Lighting . . . . . . . . . . . 6-47
High/Low Beam Changer . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
Range Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Wiper Activated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31
Heated Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
i - 6