2007 CADILLAC CTS V Page

Rear Axle
When to Check Lubricant
It is not necessary to regularly check rear axle
uid unless you suspect there is a leak or you hear
an unusual noise. A uid loss could indicate a
problem. Have it inspected and repaired.
How to Check Lubricant
To get an accurate reading, the vehicle should be
on a level surface.If the level is below the bottom of the ller plug
hole, located on the rear axle, you’ll need to add
some lubricant. Add enough lubricant to raise
the level to the bottom of the ller plug hole.
What to Use
Refer to the Maintenance Schedule to determine
what kind of lubricant to use. SeeRecommended
Fluids and Lubricants on page 473.
382

Headlamp aiming is done with the vehicle’s
low-beam headlamps. The high-beam headlamps
will be correctly aimed if the low-beam headlamps
are aimed properly.
To adjust the vertical aim, do the following:
1. Open the hood. SeeHood Release on
page 341for more information.
2. Locate the aim dot on the lens of the
low-beam headlamp.
3. Measure the distance from the ground to the
aim dot on the low-beam headlamp. Record
the distance.4. At the wall measure from the ground
upward (A) to the recorded distance
from Step 3 and mark it.
5. Draw or tape a horizontal line (B) the width of
the vehicle at the wall where it was marked it
Step 4.
Notice:Do not cover a headlamp to improve
beam cut-off when aiming. Covering a
headlamp may cause excessive heat build-up
which may cause damage to the headlamp.
6. Turn on the low-beam headlamps and place a
piece of cardboard or equivalent in front of the
headlamp not being aimed. This should
allow only the beam of light from the headlamp
being aimed to be seen on the at surface.
384

Bulb Replacement
For the proper type of replacement bulbs, see
Replacement Bulbs on page 389.
For any bulb changing procedure not listed in this
section, contact your dealer.
High Intensity Discharge (HID)
Lighting
{CAUTION:
The low beam high intensity discharge
lighting system operates at a very high
voltage. If you try to service any of the
system components, you could be
seriously injured. Have your dealer or a
qualied technician service them.
Your vehicle has HID headlamps. After your
vehicle’s HID headlamp bulb has been replaced,
you may notice that the beam is a slightly different
shade than it was originally. This is normal.
Halogen Bulbs
{CAUTION:
Halogen bulbs have pressurized gas
inside and can burst if you drop or
scratch the bulb. You or others could be
injured. Be sure to read and follow the
instructions on the bulb package.
386

Taillamps, Turn Signal, Stoplamps
and Sidemarker Lamps
A. Taillamps and
Stoplamps
B. Turn Signal Lamp
C. Sidemarker Lamp
1. Open the trunk. SeeTrunk on page 104for
more information.
2. Remove the compact spare tire cover by
turning the wing nut counterclockwise.3. Remove the four convenience net wing nuts.
4. Pull the carpet back away from the body
of the vehicle on the side with the burned
out bulb.
5. Remove the two mounting screws from the
lamp assembly.
6. Pull out the lamp assembly to expose the bulb
sockets.
7. Turn the bulb socket one-quarter turn
counterclockwise and pull the bulb socket out
of the lamp reector.
8. Pull the old bulb from the bulb socket keeping
the bulb straight as you pull it out.
9. Install a new bulb.
10. Reverse the steps to reinstall the lamp
assembly.
388

Back-Up and License Plate Lamps
A. Back-Up Lamps
B. License Plate Lamps
To replace a back-up or license plate bulb, do the
following:
1. Open the trunk. SeeTrunk on page 104for
more information.
2. Remove the cloth cover on the underside of
the trunk lid by pulling out the three push-pins
located on the underside of the trunk lid.
3. Remove the eight mounting nuts from the
underside of the trunk lid by turning the
nuts counterclockwise.4. Pull the lamp assembly away from the vehicle
to expose the bulb sockets.
5. Turn the bulb socket one-quarter turn
counterclockwise and pull the bulb and socket
out of the lamp reector.
6. Pull the old bulb from the bulb socket keeping
the bulb straight as you pull it out.
7. Install a new bulb.
8. Reverse the steps to reinstall the lamp
assembly.Replacement Bulbs
Exterior Lamp Bulb Number
Back-Up, Front/Rear Turn Signal,
Stoplamp and Taillamp3157K
Fog Lamp 9145
License Plate Lamp W5WLL
Rear Sidemarker Lamp W5WLL
For replacement bulbs not listed here, contact
your dealer/retailer.
389

Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected for
wear or cracking. SeeOwner Checks and Services
on page 469.
It is a good idea to clean or replace the wiper
blade assembly on a regular basis or when worn.
For proper windshield wiper blade length and
type, seeNormal Maintenance Replacement Parts
on page 475.
To replace the wiper blade assembly, do the
following:
1. Turn the ignition to ON with the engine off.
2. Turn on the windshield wipers and turn them
off again when the wipers are in the out-wipe
position. The driver’s side blade will be
straight up and down on the windshield.3. Pull the windshield wiper assembly away from
the windshield.
4. Lift the wiper blade assembly up so it is in
a T-shaped position. You should be able to
see a tab.
390

Tires
Your new vehicle comes with high-quality tires
made by a leading tire manufacturer. If you ever
have questions about your tire warranty and where
to obtain service, see your GM Warranty booklet for
details. For additional information refer to the tire
manufacturer’s booklet included with your vehicle.
{CAUTION:
Poorly maintained and improperly
used tires are dangerous.
Overloading your tires can cause
overheating as a result of too much
friction. You could have an air-out and
a serious accident. SeeLoading Your
Vehicle on page 321.
CAUTION: (Continued)
CAUTION: (Continued)

Underinated tires pose the same
danger as overloaded tires. The
resulting accident could cause serious
injury. Check all tires frequently to
maintain the recommended pressure.
Tire pressure should be checked when
your tires are cold. SeeInflation - Tire
Pressure on page 402.
Overinated tires are more likely
to be cut, punctured, or broken by a
sudden impact — such as when
you hit a pothole. Keep tires at the
recommended pressure.
Worn, old tires can cause accidents. If
your tread is badly worn, or if your tires
have been damaged, replace them.
SeeHigh-Speed Operation on page 404for
ination pressure adjustment for high
speed driving.
392

Notice:If your vehicle has 245/45R18,
P245/45ZR18 or P225/50R18 size tires, they are
classied as low-prole tires. Low-prole
tires are more susceptible to damage from road
hazards or curb impact than standard prole
tires. Tire and or wheel assembly damage
can occur when coming into contact with road
hazards like, potholes, or sharp edged
objects or when sliding into a curb. Your GM
warranty does not cover this type of damage.
Keep tires set to the correct ination
pressure and when possible avoid contact with
curbs, potholes and other road hazards.
Winter Tires
If you expect to drive on snow or ice covered
roads often, you may want to get winter tires for
your vehicle. All season tires provide good overall
performance on most surfaces but they may
not offer the traction you would like or the same
level of performance as winter tires on snow or ice
covered roads.Winter tires, in general, are designed for increased
traction on snow and ice covered roads. With
winter tires, there may be decreased dry
road traction, increased road noise, and shorter
tread life. After switching to winter tires, be alert for
changes in vehicle handling and braking.
See your dealer for details regarding winter tire
availability and proper tire selection. Also,
seeBuying New Tires on page 411.
If you choose to use winter tires:
Use tires of the same brand and tread type on
all four wheel positions.
Use only radial ply tires of the same size, load
range, and speed rating as the original
equipment tires.
Winter tires with the same speed rating as your
original equipment tires may not be available for H,
V, W, Y, and ZR speed rated tires. If you choose
winter tires with a lower speed rating, never
exceed the tire’s maximum speed capability.
393