2007 CADILLAC CTS V Owners Manual

7. Locate the vertical headlamp aiming screws,
which are under the hood near each headlamp
assembly.
The adjustment screw can be turned with
a 6 mm hex socket.8. Turn the vertical aiming screw until the
headlamp beam is aimed to the horizontal tape
line. If you turn it clockwise, it will raise the
beam and if you turn it counterclockwise, it will
lower the beam.
The top edge of the cut-off should be
positioned at the bottom edge of the horizontal
tape line.
9. Make sure that the light from the headlamp is
positioned at the bottom edge of the horizontal
tape line. The lamp on the left (A) shows the
correct headlamp aim. The lamp on the
right (B) shows the incorrect headlamp aim.
10. Repeat Steps 7 through 9 for the opposite
headlamp.
Passenger’s Side Shown
385

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

Front Turn Signal and Fog Lamps
A. Turn Signal Lamp
B. Fog Lamp
To replace a turn signal or fog lamp bulb, do the
following:
1. Remove the protection shield located on the
underside of the front of the vehicle by pulling
out the push-pins located on the underside
of the protection shield.
2. Reach up behind the front bumper area from
under the vehicle to access the lamp housing.3. Remove the bulb socket from the housing by
turning the bulb socket one-quarter turn
counterclockwise.
4. Remove the electrical connector from the bulb
by lifting the two plastic clips.
5. Pull the old bulb from the bulb socket keeping
the bulb straight as you pull it out.
6. Install a new bulb.
7. Reverse the steps to reinstall the lamp
assembly.
387

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

5. Squeeze the tab together and pull the wiper
blade assembly down far enough to release it
from the J-hooked end of the wiper arm.
Slide the assembly away from the arm.
Allowing the wiper blade arm to touch the
windshield when no wiper blade is installed
could damage the windshield. Any damage
that occurs would not be covered by your
warranty. Do not allow the wiper blade arm to
touch the windshield.
6. Replace the blade with a new one.
7. Reinstall the wiper blade assembly by sliding
it over the wiper arm to engage the J-hooked
end. Pull up on the assembly to lock it into
place.
8. Repeat the steps for the other wiper.
391

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