2007 CADILLAC STS Owners Manual

At Each Fuel Fill
It is important to perform these underhood checks
at each fuel ll.
Engine Oil Level Check
Check the engine oil level and add the proper oil
if necessary. SeeEngine Oil on page 380for
further details.
Notice:It is important to check the engine oil
regularly and keep it at the proper level.
Failure to keep the engine oil at the proper
level can cause damage to the engine not
covered by your warranty.
Engine Coolant Level Check
Check the engine coolant level and add
DEX-COOL®coolant mixture if necessary. See
Engine Coolant on page 389for further details.
Intercooler Coolant Level Check
(4.4L Supercharged Engine)
Check the coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 389for further details.
Windshield Washer Fluid Level Check
Check the windshield washer uid level in
the windshield washer uid reservoir and add the
proper uid if necessary.
At Least Once a Month
Tire Ination Check
Visually inspect your vehicle’s tires and make sure
they are inated to the correct pressures. Do not
forget to check the spare tire. SeeInation - Tire
Pressure on page 431. Check to make sure the
spare tire is stored securely. SeeChanging a Flat
Tire on page 464.
Tire Wear Inspection
Tire rotation is recommended if your vehicle has
the same size tires at all four wheel positions
and may be required for high mileage highway
drivers prior to the Engine Oil Life System service
notication. Check the tires for wear and, if
necessary, rotate the tires. SeeTire Inspection
and Rotation on page 438.
513

At Least Once a Year
Starter Switch Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough
room around the vehicle.
2. Firmly apply both the parking brake and the
regular brake. SeeParking Brake on
page 121.
Do not use the accelerator pedal, and be
ready to turn off the engine immediately if
it starts.
3. Try to start the engine in each gear. The
vehicle should start only in PARK (P) or
NEUTRAL (N). If the vehicle starts in any
other position, contact your GM Goodwrench
®
dealer for service.
Automatic Transmission Shift Lock
Control System Check
{CAUTION:
When you are doing this inspection, the
vehicle could move suddenly. If the vehicle
moves, you or others could be injured.
1. Before you start, be sure you have enough
room around the vehicle. It should be parked
on a level surface.
2. Firmly apply the parking brake. SeeParking
Brake on page 121.
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 PARK (P) with normal effort. If the shift
lever moves out of PARK (P), contact your
GM Goodwrench
®dealer for service.
514

Parking Brake and Automatic
Transmission Park (P) Mechanism Check
{CAUTION:
When you are doing this check, your
vehicle could begin to move. You or
others could be injured and property
could be damaged. Make sure there is
room in front of your 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 transmission in
NEUTRAL (N), slowly remove foot pressure
from the regular brake pedal. Do this until the
vehicle is held by the parking brake only.
To check the PARK (P) mechanism’s holding
ability: With the engine running, shift to
PARK (P). Then release the parking brake
followed by the regular brake.
Contact your GM Goodwrench
®dealer if service is
required.
Underbody Flushing Service
At least every spring, use plain water to ush any
corrosive materials from the underbody. Take
care to clean thoroughly any areas where mud and
other debris can collect.
515

Recommended Fluids and
Lubricants
Fluids and lubricants identied below by name,
part number, or specication can be obtained from
your dealer.
Usage Fluid/Lubricant
Engine OilThe engine requires a special
engine oil meeting GM Standard
GM4718M. Oils meeting this
standard can be identied as
synthetic, and should also be
identied with the American
Petroleum Institute (API) Certied
for Gasoline Engines starburst
symbol. However, not all synthetic
API oils with the starburst symbol
will meet this GM standard. You
should look for and use only oil that
meets GM Standard GM4718M. GM
Goodwrench
®oil meets all the
requirements for your vehicle. For
the proper viscosity, seeEngine Oil
on page 380.
Engine Cooling
System50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant on
page 389.
Usage Fluid/Lubricant
Intercooler
System
(4.4L V8
Supercharged
engine)50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant.
Hydraulic Brake
SystemDelco
®Supreme 11 Brake Fluid or
equivalent DOT-3 brake uid.
Windshield
WasherGM Optikleen
®Washer Solvent.
Parking Brake
Cable GuidesChassis Lubricant
(GM Part No. U.S. 12377985,
in Canada 88901242) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Power Steering
SystemGM Power Steering Fluid
(GM Part No. U.S. 89021184,
in Canada 89021186).
Automatic
TransmissionDEXRON
®-VI Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
SuperchargerSupercharger Oil
(GM Part No. U.S. 12345982,
in Canada 10953513). See
Supercharger Oil on page 385
516

Usage Fluid/Lubricant
Rear AxleSAE 75W-90 Synthetic
Axle Lubricant
(GM Part No. U.S. 12378261,
in Canada 10953455) meeting
GM Specication 9986115.
Front Axle
(All-Wheel
Drive)SAE 75W-90 Synthetic
Axle Lubricant
(GM Part No. U.S. 12378261,
in Canada 10953455) meeting
GM Specication 9986115.
Transfer Case
(All-Wheel
Drive)Manual Transmission Fluid
(GM Part No. U.S. 88861800,
in Canada 88861801).Usage Fluid/Lubricant
Hood Latch
Assembly,
Secondary
Latch, Pivots,
Spring
Anchor, and
Release PawlLubriplate Lubricant Aerosol
(GM Part No. U.S. 12346293,
in Canada 992723) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Hood and Door
HingesMulti-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241,
in Canada 10953474).
Weatherstrip
ConditioningWeatherstrip Lubricant
(GM Part No. U.S. 3634770,
in Canada 10953518) or
Dielectric Silicone Grease
(GM Part No. U.S. 12345579,
in Canada 992887).
517

Normal Maintenance Replacement Parts
Replacement parts identied below by name, part number, or specication can be obtained from your
GM dealer.
Part GM Part Number ACDelco®Part Number
Engine Air Cleaner/Filter Element
3.6L V6 and 4.6L V8 25735595 A2944C
4.4L V8 (V-Series) 15813300 A3078C
Engine Oil Filter
3.6L V6 25177917 PF2129
4.4L V8 (V-Series) 89017527
1PF261
4.6L V8 89017342 PF61
Passenger Compartment Air Filter 88957450 CF13C
Spark Plugs
3.6L V6 12597464 41-990
4.4L V8 (V-Series) 12592619 41-991
4.6L V8 12571535 41-987
Windshield Wiper Blade
Driver’s Side – 22 inches (56.5 cm) 88958361 —
Passenger’s Side – 21 inches (53.0 cm) 88958359 —
1Notice: If your vehicle is an STS-V model, the engine uses a special oil lter. The use of any other engine oil lter
could lead to lter failure and result in severe engine damage. Damage caused by use of the wrong engine oil lter
would not be covered by your new vehicle warranty.
518

Engine Drive Belt Routing
3.6L V6 Engine
4.4L V8 Engine
519

4.6L V8 Engine
520