2006 BUICK LUCERNE air conditioning

Radiator Pressure Cap
Notice:The radiator cap on your vehicle is a
pressure-type cap and must be tightly installed to
prevent coolant loss and possible engine damage
from overheating. Be sure the arrows on the cap
line up with the overow tube on the radiator
ller neck.
SeeEngine Compartment Overview on page 5-12for
more information on location.
Coolant Surge Tank Pressure Cap
Notice:If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
SeeEngine Compartment Overview on page 5-12for
more information on location.
Engine Overheating
There is a hot engine warning light as well as an engine
coolant temperature gage on your vehicle’s instrument
panel cluster.
In addition, if your vehicle is equipped with a Driver
Information Center (DIC), you will nd an ENGINE
OVERHEATED IDLE ENGINE, ENGINE HOT A/C
(Air Conditioning) OFF, or a ENGINE OVERHEATEDSTOP ENGINE message displayed on the DIC. See
DIC Warnings and Messages on page 3-56DIC
Warnings and Messages for more information.
If Steam Is Coming From Your Engine
{CAUTION:
Steam from an overheated engine can burn
you badly, even if you just open the hood. Stay
away from the engine if you see or hear steam
coming from it. Just turn it off and get
everyone away from the vehicle until it cools
down. Wait until there is no sign of steam or
coolant before you open the hood.
If you keep driving when your engine is
overheated, the liquids in it can catch re. You
or others could be badly burned. Stop your
engine if it overheats, and get out of the
vehicle until the engine is cool.
Notice:If your engine catches re because you
keep driving with no coolant, your vehicle can
be badly damaged. The costly repairs would not be
covered by your warranty.
5-27

Tire Size
The following illustration shows an example of a typical
passenger vehicle tire size.
(A) Passenger (P-Metric) Tire:The United States
version of a metric tire sizing system. The letter P as the
rst character in the tire size means a passenger
vehicle tire engineered to standards set by the U.S. Tire
and Rim Association.
(B) Tire Width:The three-digit number indicates the
tire section width in millimeters from sidewall to sidewall.
(C) Aspect Ratio:A two-digit number that indicates
the tire height-to-width measurements. For example, if
the tire size aspect ratio is 60, as shown in item C of the
illustration, it would mean that the tire’s sidewall is 60
percent as high as it is wide.(D) Construction Code:A letter code is used to
indicate the type of ply construction in the tire. The letter
R means radial ply construction; the letter D means
diagonal or bias ply construction; and the letter B means
belted-bias ply construction.
(E) Rim Diameter:Diameter of the wheel in inches.
(F) Service Description:These characters represent
the load range and speed rating of the tire. The load
index represents the load carry capacity a tire is certied
to carry. The load index can range from 1 to 279. The
speed rating is the maximum speed a tire is certied
to carry a load. Speed ratings range from A to Z.
Tire Terminology and Denitions
Air Pressure:The amount of air inside the tire pressing
outward on each square inch of the tire. Air pressure
is expressed in pounds per square inch (psi) or
kilopascal (kPa).
Accessory Weight:This means the combined weight
of optional accessories. Some examples of optional
accessories are, automatic transmission, power steering,
power brakes, power windows, power seats, and air
conditioning.
5-59

Fuses Usage
F1 Spare
F2 Driver’s Side Low-Beam
F3 Passenger’s Side Low-Beam
F4 Airbag Ignition
F5 Engine Control Module
F6 Transaxle Ignition
F7 Spare
F8 Spare
F9 Spare
F10 High-Beam Headlamp
F11 High-Beam Headlamp
F12 Windshield Washer Pump
F13 Spare
F14Climate Controls, Instrument Panel
Cluster
F15 Spare
F16 Fog Lamps
F17 Horn
F18 Windshield Wiper
F19 Driver’s Side Corner Lamp
F20 Passenger’s Side Corner Lamp
F21 Oxygen Sensor
F22 PowertrainFuses Usage
F23Engine Control Module (ECM),
Crank
F24 Injector Coil
F25 Injector Coil
F26 Air Conditioning
F27 Air Solenoid
F28Engine Control Module, Transaxle
Control Module (ECM/TCM)
F29 Spare
F30 Spare
F31 Spare
F32 Spare
J-Case Fuse Usage
JC1 Heated Windshield Washer
JC2 Cooling Fan 1
JC3 Spare
JC4 Crank
JC5 Cooling Fan 2
JC6 Anti-lock Brake System 2
JC7 Anti-lock Brake System 1
JC8 Air Pump
5-95

Relays Usage
R1 Cooling Fan 1
R2 Cooling Fan
R3 Crank
R4 Powertrain
R5 Spare
R6 Run/Crank
R7 Cooling Fan 2
R8 Windshield Wiper
R9 Air Pump
R10 Windshield Wiper High
R11 Air Conditioning
R12 Air Solenoid
Rear Underseat Fuse Block
The rear fuse block is located under the rear seat on
the driver’s side. The rear seat cushion must be
removed to access the rear 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 fusecenter 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 access the fuse block, pull out and lift up on the
cover latch, located at the end of the fuse block, near
the battery cable.
5-96

Fuses Usage
F47Heated/Cooled Seats, Ignition 3
(Option)
F48 Ignition Switch
F49 Not Used
Circuit
BreakersUsage
CB1Front Passenger’s Seat, Memory
Seat Module
CB2Driver’s Power Seat, Memory Seat
Module
CB3 Door Module, Power Windows
CB4 Not Used
Resistor Usage
F39 Terminating Resistor
Relays Usage
R1 Retained Accessory Power
R2 Park Lamps
R3 Run (Option)
R4 Daytime Running Lamps
R5Front Heating, Ventilation, Air
Conditioning Blower
R6 Trunk Release
R7 Fuel Pump
R8 Not Used
R9 Door Lock
R10 Door Unlock
R11 Not Used
R12 Not Used
R13 Not Used
R14 Rear Defogger
R15Electronic Leveling Control
Compressor
5-100

Capacities and Specications
The following approximate capacities are given in English and metric conversions. SeeRecommended Fluids and
Lubricants on page 6-12for more information.
ApplicationCapacities
English Metric
Air Conditioning Refrigerant R134a 1.43 lbs 0.65 kg
Automatic Transaxle- Drain and Rell
3.8L V6 Engine 7.4 qt 7.0L
4.6L V8 Engine 7.0 qt 6.6 L
Engine Cooling System
3.8L V6 Engine 12.0 qt 11.4 L
4.6L V8 Engine 13.0 qt 12.2 L
Engine Oil with Filter
3.8L V6 Engine 4.5 qt 4.3 L
4.6L V8 Engine 7.5 qt 7.1 L
Fuel Tank 18.5 gal 70.0 L
Wheel Nut Torque 100 lb ft 140Y
All capacities are approximate. When adding, be sure to ll to the appropriate level, as recommended in this
manual. Recheck uid level after lling.
5-101

Additional Required Services (cont’d)
Service and Miles (Kilometers)25,000
(40 000)50,000
(80 000)75,000
(120 000)100,000
(160 000)125,000
(200 000)150,000
(240 000)
Engine cooling system service
(or every ve years, whichever occurs
rst).An Emission Control Service. See
footnote (j).•
Inspect engine accessory drive belt.
An Emission Control Service. See
footnote (n).•
Maintenance Footnotes
†The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to
the completion of the vehicle’s useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the
maintenance be recorded.
(a)Visually inspect brake lines and hoses for proper
hook-up, binding, leaks, cracks, chang, etc. Inspect
disc brake pads for wear and rotors for surface
condition. Inspect other brake parts, including calipers,
parking brake, etc.(b)Visually inspect front and rear suspension and
steering system for damaged, loose, or missing parts or
signs of wear. Inspect power steering lines and hoses
for proper hook-up, binding, leaks, cracks, chang, etc.
(c)Visually inspect hoses and have them replaced if they
are cracked, swollen, or deteriorated. Inspect all pipes,
ttings and clamps; replace with genuine GM parts as
needed. To help ensure proper operation, a pressure test
of the cooling system and pressure cap and cleaning the
outside of the radiator and air conditioning condenser is
recommended at least once a year.
6-7

A
Accessories and Modications............................ 5-3
Accessory Power Outlet(s)...............................3-21
Adding Equipment to Your Airbag-Equipped
Vehicle.......................................................1-68
Additives, Fuel................................................. 5-6
Add-On Electrical Equipment............................5-93
Air Cleaner/Filter, Engine.................................5-19
Air Conditioning......................................3-23, 3-26
Airbag
Passenger Status Indicator...........................3-37
Readiness Light..........................................3-36
Airbag Sensing and Diagnostic Module (SDM)......... 7-9
Airbag System................................................1-52
Adding Equipment to Your Airbag-Equipped
Vehicle...................................................1-68
How Does an Airbag Restrain?......................1-61
Passenger Sensing System...........................1-63
Servicing Your Airbag-Equipped Vehicle..........1-67
What Makes an Airbag Inate?......................1-61
What Will You See After an Airbag Inates?........1-62
When Should an Airbag Inate?....................1-59
Where Are the Airbags?...............................1-55
Antenna, Backglass.......................................3-101
Antenna, XM™ Satellite Radio
Antenna System........................................3-101Anti-Lock Brake System (ABS)........................... 4-7
Anti-Lock Brake, System Warning Light..............3-41
Appearance Care
Aluminum or Chrome-Plated Wheels..............5-88
Care of Safety Belts....................................5-86
Chemical Paint Spotting...............................5-90
Cleaning Exterior Lamps/Lenses....................5-87
Cleaning the Inside of Your Vehicle................5-83
Fabric/Carpet..............................................5-84
Finish Care.................................................5-87
Finish Damage............................................5-89
Instrument Panel, Vinyl, and Other
Plastic Surfaces.......................................5-86
Leather......................................................5-85
Sheet Metal Damage...................................5-89
Tires..........................................................5-89
Underbody Maintenance...............................5-90
Vehicle Care/Appearance Materials................5-91
Washing Your Vehicle...................................5-87
Weatherstrips..............................................5-86
Windshield and Wiper Blades........................5-88
Ashtray(s)......................................................3-22
Audio System(s).............................................3-74
Audio Steering Wheel Controls......................3-99
Backglass Antenna.....................................3-101
Care of Your CD Player..............................3-101
Care of Your CDs ......................................3-100
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