2006 CADILLAC DTS PROFESSIONAL spare tire

Removing the Spare Tire and Tools................5-73
Removing the Flat Tire and Installing
the Spare Tire..........................................5-75
Storing a Flat or Spare Tire and Tools............5-81
Spare Tire...................................................5-82
Appearance Care............................................5-83
Cleaning the Inside of Your Vehicle.................5-83
Fabric/Carpet...............................................5-84
Leather.......................................................5-85
Instrument Panel, Vinyl, and Other
Plastic Surfaces........................................5-85
Wood Panels...............................................5-85
Speaker Covers............................................5-86
Care of Safety Belts......................................5-86
Weatherstrips...............................................5-86
Washing Your Vehicle...................................5-86
Cleaning Exterior Lamps/Lenses.....................5-86
Finish Care..................................................5-87
Windshield and Wiper Blades.........................5-87
Aluminum or Chrome-Plated Wheels................5-88
Tires...........................................................5-88
Sheet Metal Damage.....................................5-89
Finish Damage.............................................5-89
Underbody Maintenance................................5-89
Chemical Paint Spotting.................................5-89
Vehicle Care/Appearance Materials..................5-90Vehicle Identication......................................5-91
Vehicle Identication Number (VIN).................5-91
Service Parts Identication Label.....................5-91
Electrical System............................................5-92
Add-On Electrical Equipment..........................5-92
Headlamp Wiring..........................................5-92
Windshield Wiper Fuses................................5-92
Power Windows and Other Power Options.......5-93
Fuses and Circuit Breakers............................5-93
Underhood Fuse Block..................................5-93
Rear Underseat Fuse Block...........................5-96
Capacities and Specications........................5-101
Section 5 Service and Appearance Care
5-2

Headlamp Aiming
The vehicle has a visual optical headlamp aiming
system. The aim has been preset at the factory and
should need no further adjustment.
However, if the vehicle is damaged in an accident, the
headlamp aim may be affected and adjustment may
be necessary.
If oncoming vehicles ash their high beams at you, this
may also mean the vertical aim needs to be adjusted.
It is recommended that the vehicle is taken to your
dealer for service if the headlamps need to be re-aimed.
It is possible however, to re-aim the headlamps as
described in the following procedure.
Notice:To make sure your headlamps are aimed
properly, read all the instructions before beginning.
Failure to follow these instructions could cause
damage to headlamp parts.The vehicle should be properly prepared as follows:The vehicle should be placed so the headlamps are
25 ft (7.6 m) from a light colored wall or other at
surface.
The vehicle must have all four tires on a level
surface which is level all the way to the wall or other
at surface.
The vehicle should be placed so it is perpendicular
to the wall or other at surface.
The vehicle should not have any snow, ice, or
mud on it.
The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being
performed.
The vehicle should be normally loaded with a full
tank of fuel and one person or 160 lbs (75 kg)
sitting on the driver’s seat.
Tires should be properly inated.
The spare tire is in its original location in
the vehicle.
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(A) Temporary Use Only:The compact spare tire or
temporary use tire has a tread life of approximately
3,000 miles (5 000 km) and should not be driven
at speeds over 65 mph (105 km/h). The compact spare
tire is for emergency use when a regular road tire
has lost air and gone at. SeeSpare Tire on page 5-82
andIf a Tire Goes Flat on page 5-71.
(B) Tire Ply Material:The type of cord and number of
plies in the sidewall and under the tread.(C) Tire Identication Number (TIN):The Tire
Identication Number (TIN). The TIN shows the
manufacturer and plant code, tire size, and date
the tire was manufactured. The TIN is molded onto
both sides of the tire, although only one side may have
the date of manufacture.
(D) Maximum Cold Ination Load Limit:Maximum
load that can be carried and the maximum pressure
needed to support that load. SeeInation - Tire
Pressure on page 5-56andLoading Your Vehicle on
page 4-31.
(E) Tire Ination:The temporary use tire or compact
spare tire should be inated to 60 psi (420 kPa).
For more information on tire pressure and ination see
Ination - Tire Pressure on page 5-56andSpare
Tire on page 5-82.
(F) Tire Size:A combination of letters and numbers
dene a tire’s width, height, aspect ratio, construction
type and service description. The letter T as the
rst character in the tire size means the tire is for
temporary use only.
(G) TPC Spec (Tire Performance Criteria
Specication):Original equipment tires designed to
GM’s specic tire performance criteria have a TPC
specication code molded onto the sidewall. GM’s TPC
specications meet or exceed all federal safety
guidelines. Compact Spare Tire Example
5-51

Ination - Tire Pressure
Tires need the correct amount of air pressure to
operate effectively.
Notice:Do not let anyone tell you that
under-ination or over-ination is all right. It is not.
If your tires do not have enough air (under-ination),
you can get the following:
Too much exing
Too much heat
Tire overloading
Premature or irregular wear
Poor handling
Reduced fuel economy
If your tires have too much air (over-ination), you
can get the following:
Unusual wear
Poor handling
Rough ride
Needless damage from road hazardsA Tire and Loading Information label is attached to the
vehicle’s center pillar, below the driver’s door latch.
This label lists your vehicle’s original equipment
tires and shows the correct ination pressures for your
tires when they are cold. The recommended cold
tire ination pressure, shown on the label, is the
minimum amount of air pressure needed to support your
vehicle’s maximum load carrying capacity.
For additional information regarding how much weight
your vehicle can carry, and an example of the tire
and loading information label, seeLoading Your Vehicle
on page 4-31. How you load your vehicle affects the
vehicle handling and ride comfort, never load your
vehicle with more weight than it was designed to carry.
When to Check
Check your tires once a month or more. Do not forget to
check the spare tire. If your vehicle has a compact
spare tire, it should be at 60 psi (420 kPa). For additional
information seeSpare Tire on page 5-82.
5-56

Professional Vehicle
The proper ination of the tires on your professional
vehicle depends on the type of tires on it.
If your vehicle has P235/60R17 size tires, the cold
ination pressure is 41 psi (284 kPa).
If your vehicle has LT235/60R17E size tires, the cold
ination pressure depends on the vehicle mass and
should be determined by the vehicle coach-builder.
A tire and loading information label provided by the
nal stage manufacturer should be attached to the
B-pillar on the driver’s side of the vehicle. If the nal
stage manufacturer’s label is not present, the
coach-builder should be consulted. Do not use the
tire pressures indicated on the General Motors label.
These tire pressures are for the incomplete vehicle
and are not the correct tire pressures for the
completed professional vehicle.
Operation at ination pressures below this
recommendation may cause your tires to become
overloaded.
Tire Pressure Monitor System
The Tire Pressure Monitor System (TPMS) is designed
to monitor the amount of pressure in your vehicle’s
tires using radio and sensor technology. A TPMS
sensor, mounted onto the vehicle’s full-size tire and
wheel assembly, transmits tire pressure readings to a
receiver located in the vehicle. The compact spare
tire and wheel does not have a TPMS sensor.
Tire pressure status and tire pressure warnings are
shown on the Driver Information Center (DIC) display.
For additional information and details about the DIC
operation and displays seeDIC Controls and Displays
on page 3-72andDIC Warnings and Messages on
page 3-76.
If a low tire pressure condition is detected, the TPMS
will display the CHECK TIRE PRESSURE warning
message on the DIC and, at the same time, illuminate
the low tire pressure warning symbol, on the instrument
panel cluster.
You may notice, during cooler weather conditions, that
the low tire pressure warning symbol and the CHECK
TIRE PRESSURE message will display when the vehicle
is rst started and then turn off as you start to drive
the vehicle. This could be an early indicator that the tire
pressures are getting low and need to be checked
and inated to the proper pressure.
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Each tire, including the spare (if provided), should be
checked monthly when cold and inated to the ination
pressure recommended by the vehicle manufacturer
on the vehicle placard or tire ination pressure label.
(If your vehicle has tires of a different size than the size
indicated on the vehicle placard or tire ination
pressure label, you should determine the proper
tire ination pressure for those tires.)
As an added safety
feature, your vehicle has
been equipped with a
tire pressure monitoring
system (TPMS) that
illuminates a low tire
pressure telltale when one
or more of your tires is
signicantly under-inated.
Accordingly, when the low tire pressure telltale
illuminates, you should stop and check your tires as
soon as possible, and inate them to the proper
pressure. Driving on a signicantly under-inated tire
causes the tire to overheat and can lead to tire failure.
Under-ination also reduces fuel efficiency and tire
tread life, and may affect the vehicle’s handling
and stopping ability.Please note that the TPMS is not a substitute for proper
tire maintenance, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-ination has
not reached the level to trigger illumination of the
TPMS low tire pressure telltale.
The CHECK TIRE PRESSURE warning message and
low tire pressure light (telltale) will appear at each
ignition cycle until the tires are inated to the correct
ination pressure.
The Tire and Loading Information Label shows the size
of your vehicle’s original tires and their recommended
cold ination pressures. SeeLoading Your Vehicle
on page 4-31, for the location of the tire and loading
information label. Also seeInation - Tire Pressure
on page 5-56.
Your vehicle’s TPMS can alert you about a low tire
pressure condition but it does not replace normal tire
maintenance. SeeTire Inspection and Rotation on
page 5-63andTires on page 5-49.
Notice:Do not use a tire sealant if your vehicle has
Tire Pressure Monitors. The liquid sealant can
damage the tire pressure monitor sensors.
5-60

Resetting the TPMS Sensor
Identication Codes
Each TPMS sensor has a unique identication code.
Any time you replace one or more of the TPMS sensors,
rotate the vehicle’s tires, or install a full-size spare
that has a TPMS sensor, the sensor’s identication
codes will need to be matched to the new tire/wheel
position. Each tire/wheel position is matched to
the TPMS sensor using a TPMS diagnostic tool. See
your GM dealer for service.
The TPMS sensors may also be matched to each
tire/wheel position by increasing or decreasing the tire’s
air pressure. When increasing the tire’s air pressure,
do not exceed the maximum tire pressure indicated on
the tire’s sidewall.
You will have two minutes to match the rst tire/wheel
position, and ve minutes overall, to match all
four tire/wheel positions. If it takes longer than
two minutes, to match the rst tire and wheel, or
more than ve minutes to match all four tire and wheel
positions the matching process stops and you will
need to start over.The TPMS matching process is outlined below:
1. Set the parking brake.
2. Turn the ignition switch to RUN with the engine off.
3. Press the Driver Information Center (DIC) vehicle
information button until the RELEARN TIRE
POSITIONS displays.
4. Press the set/reset button to allow the system to
learn the tire positions. The horn will sound twice
to indicate that the TPMS is ready, and then
the message TIRE LEARNING ACTIVE will display.
The sensor matching process can begin.
5. Start with the driver’s side front tire.
6. Remove the valve cap from the valve stem.
Activate the TPMS sensor by increasing or
decreasing the tire’s air pressure for ve seconds,
or until a horn chirp sounds. The horn chirp,
which may take up to 30 seconds, conrms that the
sensor identication code has been matched to
this tire position. To decrease the tire’s air-pressure
use the pointed end of the valve cap, a pencil-style
air pressure gage or a key.
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7. Proceed to the passenger’s side front tire, and
repeat the procedure in Step 6.
8. Proceed to the passenger’s side rear tire, and
repeat the procedure in Step 6.
9. Proceed to the driver’s side rear tire, and repeat the
procedure in Step 6.
10. When the re-learning is complete, the horn will
sound and the TIRE LEARNING ACTIVE message
will clear from the DIC display. Exit the matching
process by turning the ignition switch to OFF.
11. Set all four tires to the recommended air pressure
level as indicated on the tire and loading information
label.
12. Put the valve caps back on the valve stems.
The compact spare tire does not have a TPMS sensor.
If you replace one of the road tires with the compact
spare, the SERVICE TIRE MONITOR SYSTEM
message will be displayed on the DIC screen. This
message should go off once you re-install the road tire
containing the TPMS sensor. The SERVICE TIRE
MONITOR SYSTEM message is also displayed when
a part of the TPMS is not working properly.One or more missing or inoperable TPMS sensors will
cause the service tire monitor message to be displayed.
See your GM dealer for service if all the TPMS
sensors are installed and the error message comes on
and stays on.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference, and
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modications to this system by other than
an authorized service facility could void authorization to
use this equipment.
5-62