Page 469 of 528

Black plate (119,1)Cadillac STS Owner Manual - 2011
Fuses MiniUsage
V/CHKInstrument Panel Module-Voltage
Check
WPR Wipe/Wash Module Assembly
WPR SW/VICS Rain Sensor, Wiper Switch
Relays Usage
A/C CMPRSR
CLTCH Air Conditioning Compressor Clutch
ACCY Accessory, Rain Sensor, Headlamp
Washer Relay Coil, Windshield
Wiper/Washer Module
BRK
VAC PUMP Brake Vacuum Pump
FAN S/P Cooling Fan Series/Parallel
FOG LAMP Fog Lamps FRT BLWR Front Blower Motor
FUEL COOL Fuel Cooling Pump
HI BEAM High Beam Headlamp
HI FAN SPD Cooling Fan High Speed HORN Horn
Relays Usage
LO FAN SPD Cooling Fan Low Speed
LOW BEAM
W/O HID/HID Low Beam Headlamp, High Intensity
Discharge (HID)
PRK LAMP Parking Lamps, Instrument Panel
Dimming, Rear License Plate Lamps
PWR/TRN Engine Controls
RUN CRNK Heated Washer Nozzle, Air Quality,
Antilock Brake System, Climate
Control Panel, TCM, ECM, Instrument
Panel Cluster
SPARE Spare
SPARE Spare
SPARE Spare
STRTR Starter
WPR HI Windshield Wiper High Speed
Circuit
Breakers Usage
HDLP WASH
Headlamp Washer Motor
(Circuit Breaker)
6-119
Page 470 of 528
Black plate (120,1)Cadillac STS Owner Manual - 2011
Rear Underseat Fuse Block
Removing the Rear Seat Cushion
Notice:If you touch the exposed wires with the
metal on the seat cushion, you could cause a short
that could damage the battery and or wires. Avoid
contact between the rear seat and the fuse center
whenever you remove or reinstall the rear seat. Do
not remove covers from any of the covered parts,
and do not store anything under the seats.
To remove the rear seat cushion, do the following:
1. Pull up on the front of the cushion to release the front hooks.
2. Pull the cushion up and out toward the front of the vehicle. To reinstall the rear seat cushion, do the following:
{WARNING:
A safety belt that is not properly routed through
the seat cushion or is twisted will not provide the
protection needed in a crash. If the safety belt has
not been routed through the seat cushion at all, it
(Continued)
6-120
Page 471 of 528

Black plate (121,1)Cadillac STS Owner Manual - 2011
WARNING: (Continued)
will not be there to work for the next passenger.
The person sitting in that position could be badly
injured. After reinstalling the seat cushion, always
check to be sure that the safety belts are properly
routed and are not twisted.
1. Buckle the center passenger position safety belt, then route the safety belts through the proper slots
in the seat cushion. Do not let the safety belts get
twisted.
2. Slide the rear of the cushion up and under the seatback so the rear-locating guides hook into the
wire loops on the back frame.
3. With the seat cushion lowered, push rearward and then press down on the seat cushion until the
spring locks on both ends engage. 4. Check to make sure the safety belts are properly
routed and that no portion of any safety belt is
trapped under the seat. Also make sure the seat
cushion is secured.Rear Underseat Fuse Block
There is a fuse block located under the rear seat on the
driver side and passenger side of the vehicle. The rear
seat cushion must be removed to access the fuse
blocks. See “Removing the Rear Seat Cushion” listed
previously in this section.
To access the fuses, push in the two tabs, then lift the
cover off.
6-121
Page 473 of 528
Black plate (123,1)Cadillac STS Owner Manual - 2011
FusesUsage
AMP Amplifier
SPARE Spare
THEFT/SHFT Theft Sensors, Auto Shifter, Power
Sounder
MRTD MDL Magnetic Ride Control Module
(Option)
REAR DR MDL Rear Door Modules
ELC EXH Electronic Level Control, Exhaust
Solenoid (Option)
DDM Driver Door Module, Front Door
SubWoofers (Option)
TV/VICS/SCM Infotainment (Export Only),
Supervisory Control Module (Option)
REAR HTD/ SEATS Rear Heated Seats
SPARE Spare
SPARE Spare
Fuses Usage
IGN3Front Passenger Heated Seat, Auto
Shifter, Occupant Protection,
Electronic Tension Reducer for
Seatbelt
REAR
SHLF SPKR Rear Shelf Speaker (Option)
MSM Memory Seat Module Lumbar
TRUNK
RELSE SW Trunk Release, Valet Lockout Switch
BCK/UP LAMP Reverse Lamps, Rear Parking Aid,
Inside Rearview Mirrors
AIR BAG/BATT Airbag POS LAMPS Rear Taillamps
ELC CMPRSR Automatic Level Control (Option)
6-123
Page 476 of 528
Black plate (126,1)Cadillac STS Owner Manual - 2011
FusesUsage
AIRBAG/IGNSensing and Diagnostic Monitor,
Automatic Occupant Sensor,
Passenger Supplemental Inflatable
Restraint
CNSTR/VENT Canister Vent Solenoid
SPARE Spare
FRT PDM Front Passenger Door Module, Right
Power Subwoofer
FUEL PUMP Fuel Pump
HTD STR Heated Steering WheelRF HTD/
SEAT/XM Front Passenger Heated Seat,
S-Band™
Antenna
RDO/ONSTAR Radio, OnStar
®
INT LAMP Interior Lamps
LT TRN/LDW Left Turn Signal, Lane Departure
Warning (Option)
Fuses
Usage
REAR DEFOG Rear Defogger
REAR/FOG Rear Fog Lamps (Option)
RIM Rear Integration Module
RIM /RPA
/ISRVM /CLM Rear Integration Module, Rear
Parking Aid, Inside Rearview Mirror,
Column Lock Module, Power
Sounder, Active Front Steering (AFS),
Supervisory Control Module
RUN/CRNK UHBEC Run, CRNK Relay Coil, Rear
Fog Lamp Relay Coil
S/ROOF Sun Roof Module (Option) SPARE Spare
STOP LAMPS Stop Lamps
RT TRN/SZBA Right Turn Signal, Side Blind Zone
Alert (Option)
6-126
Page 482 of 528

Black plate (4,1)Cadillac STS Owner Manual - 2011
Every Engine Oil Change
.Change engine oil and filter. Reset oil life system.
SeeEngine Oilon page 6‑16andEngine Oil Life
Systemon page 6‑20. An Emission Control
Service.
.Engine coolant level check. See Engine Coolanton page 6‑25.
.Engine cooling system inspection. Visual
inspection of hoses, pipes, fittings, and clamps and
replacement, if needed.
.Windshield washer fluid level check. See
Windshield Washer Fluid on page 6‑34.
.Windshield wiper blade inspection for wear,
cracking, or contamination and windshield and
wiper blade cleaning, if contaminated. See
Windshield and Wiper Blades
on page 6‑111. Worn
or damaged wiper blade replacement. See
Windshield Wiper Blade Replacement
on
page 6‑49.
.Tire inflation pressures check. See Inflation - Tire
Pressure on page 6‑58.
.Tire wear inspection. See Tire Inspection and
Rotation on page 6‑65.
.If tire rotation is recommended for the vehicle,
rotate tires if necessary. See Tire Inspection and
Rotation on page 6‑65.
.Fluids visual leak check (or every 12 months,
whichever occurs first). A leak in any system must
be repaired and the fluid level checked.
.Engine air cleaner filter inspection. See Engine Air
Cleaner/Filter on page 6‑21.
.Brake system inspection (or every 12 months,
whichever occurs first).
.Steering and suspension inspection. Visual
inspection for damaged, loose, or missing parts
or signs of wear.
.Body hinges and latches, key lock cylinders,
rear compartment hinges, console door hinges,
and glove box door hinges lubrication. See
Recommended Fluids and Lubricants
on
page 7‑9. More frequent lubrication may be
required when the vehicle is exposed to a
corrosive environment. Applying silicone grease
on weatherstrips with a clean cloth makes them
last longer, seal better, and not stick or squeak.
.Restraint system component check. See Checking
the Restraint Systems on page 2‑72.
.Fuel system inspection for damage or leaks.
.Exhaust system and nearby heat shields
inspection for loose or damaged components.
7-4
Page 483 of 528

Black plate (5,1)Cadillac STS Owner Manual - 2011
Additional Required Services
Every 12 000 km/7,500 Miles
.If tire rotation is recommended for the vehicle,
rotate tires. Tires should be rotated every
12 000 km/7,500 miles. SeeTire Inspection and
Rotation on page 6‑65.
At Each Fuel Stop
.Engine oil level check. See Engine Oilon
page 6‑16.
.Engine coolant level check. See Engine Coolanton page 6‑25.
.Windshield washer fluid level check. See
Windshield Washer Fluid on page 6‑34.
Once a Month
.Tire inflation pressures check. See Inflation - Tire
Pressure on page 6‑58.
.Tire wear inspection. See Tire Inspection and
Rotation on page 6‑65.
.Sunroof track and seal inspection, if equipped. See
Sunroof on page 3‑57.
Once a Year
.Starter switch check. See Owner Checks and
Services on page 7‑7.
.Automatic transmission shiftlock control function
check. See Owner Checks and Serviceson
page 7‑7.
.Parking brake and automatic transmission P (Park)
mechanism check. See Owner Checks and
Services on page 7‑7.
.Accelerator pedal check for damage, high effort,
or binding. Replace if needed.
.If the vehicle has a Tire Sealant and Compressor
Kit, check the sealant expiration date printed on
the instruction label of the kit. See Tire Sealant and
Compressor Kit (Without Selector Switch)
on
page 6‑76or Tire Sealant and Compressor Kit
(With Selector Switch) on page 6‑85.
.Underbody flushing service.
7-5
Page 486 of 528

Black plate (8,1)Cadillac STS Owner Manual - 2011
Automatic Transmission Shift Lock
Control Function Check
{WARNING:
When you are doing this inspection, the vehicle
could move suddenly. If the vehicle moves, you or
others could be injured.
1. Before starting this check, be sure there is enough room around the vehicle. It should be parked on a
level surface.
2. Firmly apply the parking brake. See Parking Brake
on page 3‑33.
Be ready to apply the regular brake immediately if
the vehicle begins to move.
3. With the engine off and without applying the regular brake, try to move the shift lever out of
P (Park) with normal effort. If the shift lever moves
out of P (Park), contact your dealer for service.
Parking Brake and Automatic
Transmission P (Park) Mechanism
Check
{WARNING:
When you are doing this check, the vehicle could
begin to move. You or others could be injured and
property could be damaged. Make sure there is
room in front of the vehicle in case it begins to
roll. Be ready to apply the regular brake at once
should the vehicle begin to move.
Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set the
parking brake.
.To check the parking brake's holding ability: With
the engine running and the transmission in
N (Neutral), slowly remove foot pressure from the
regular brake pedal. Do this until the vehicle is held
by the parking brake only.
.To check the P (Park) mechanism's holding ability:
With the engine running, shift to P (Park). Then
release the parking brake followed by the regular
brake.
Contact your dealer if service is required.
7-8