2007 BUICK LACROSSE air conditioning

DIC Warnings and Messages
Messages are displayed on the uplevel DIC to
notify the driver that the status of the vehicle has
changed and that some action may be needed
by the driver to correct the condition. Multiple
messages may appear one after another.
Some messages may not require immediate
action, but you can press any of the DIC buttons
on the uplevel vehicle to acknowledge that
you received the message and clear it from the
DIC display.
Some messages cannot be cleared from the DIC
display because they are more urgent. These
messages require action before they can be
cleared.
If there are any active warning messages when
the vehicle is turned off, two chimes sound and the
DIC goes into a reminder mode. The reminder
mode displays any active message. If there
are multiple messages, the DIC displays each
message for ve seconds. After each active
message is displayed once, the reminder mode
turns off.You should take any messages that appear on the
display seriously and remember that clearing
the messages will only make the messages
disappear, not correct the problem.
The following are the possible messages that can
be displayed and some information about them.
A/C OFF FOR ENGINE PROTECTION
This message displays when the engine coolant
becomes hotter than the normal operating
temperature. SeeEngine Coolant Temperature
Gage on page 189. To avoid added strain on a hot
engine, the air conditioning compressor is
automatically turned off. When the coolant
temperature returns to normal, the air conditioning
compressor turns back on. You can continue to
drive your vehicle.
This message comes on while the ignition is in
RUN. Press any of the DIC buttons to acknowledge
this warning message and to clear it from the
screen.
208

(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/
transaxle, power steering, power brakes, power
windows, power seats, and air conditioning.
Aspect Ratio:The relationship of a tire’s height
to its width.
Belt:A rubber coated layer of cords that is
located between the plies and the tread. Cords
may be made from steel or other reinforcing
materials.
Bead:The tire bead contains steel wires wrapped
by steel cords that hold the tire onto the rim.
Bias Ply Tire:A pneumatic tire in which the plies
are laid at alternate angles less than 90 degrees
to the centerline of the tread.
406

J-Style Fuses Usage
25 Air Pump
26 Battery Main 1
27 Battery Main 2
28 Battery Main 3
29 Fan 1
30 Battery Main 4
31 Anti-lock Brake System Motor
32 Fan 2
33 Starter
Micro-Relays Usage
34 Headlamp High-Beam
35 Headlamp Driver Module
36 Fog Lamp
37 Ignition 1
38 Air Conditioning Compressor
39 Horn
40 Powertrain
41 Fuel Pump
Mini-Relays Usage
42 Fan 1
43 Fan 3
Mini-Relays Usage
44 Windshield Wiper High
45 Windshield Wiper
46 Fan 2
48 Crank
Spare Fuses Usage
49 Spare
50 Spare
51 Spare
52 Blank
53 Blank
54 Blank
Fuse Puller Usage
55 Fuse Puller
Diodes Usage
§Air Conditioner Compressor Clutch
Diode
453

Capacities and Specications
The following approximate capacities are given in English and metric conversions.
Capacities and Specications
ApplicationCapacities
English Metric
Air Conditioning Refrigerant R134aFor the air conditioning system refrigerant charge
amount, see the refrigerant caution label located
under the hood. See your dealer for more information.
Automatic Transaxle (Drain and Rell) 7.4 qt 7.0 L
Cooling System Including Reservoir
3.6L V6 and 3.8L V6 11.2 qt 10.6 L
Engine Oil with Filter
3.6L V6 5.5 qt 5.2 L
3.8L V6 4.5 qt 4.3 L
Fuel Tank
3.8L Engine (with NU6 emissions) sold new in CA, ME,
VT, NY, MA (see your dealer for bordering states)17.0 gal 64.4 L
3.8L Engine (without NU6 emissions) sold new in all
other states (see your dealer for more information)17.5 gal 66.2 L
3.6L Engines sold new in all states 17.5 gal 66.2 L
Wheel Nut Torque 100 lb ft
140Y
All capacities are approximate. When adding, be sure to ll to the approximate level, as recommended in this
manual. SeeScheduled Maintenance on page 462
454

Maintenance Footnotes
(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.
(d)Visually inspect wiper blades for wear or
cracking. Replace wiper blades that appear worn
or damaged or that streak or miss areas of
the windshield.(e)Make sure the safety belt reminder light and all
your belts, buckles, latch plates, retractors, and
anchorages are working properly. Look for
any other loose or damaged safety belt system
parts. If you see anything that might keep a safety
belt system from doing its job, have it repaired.
Have any torn or frayed safety belts replaced. Also
look for any opened or broken airbag coverings,
and have them repaired or replaced. The
airbag system does not need regular maintenance.
(f)Lubricate all key lock cylinders. Lubricate all
hinges and latches, including those for the
body doors, hood, secondary latch, pivots, spring
anchor, release pawl, rear compartment, glove
box door, and console door. More frequent
lubrication may be required when exposed to a
corrosive environment. Applying silicone grease on
weatherstrips with a clean cloth will make them
last longer, seal better, and not stick or squeak.
(g)If you drive regularly under dusty conditions,
the lter may require replacement more often.
465

A
Accessories and Modications..................... 341
Accessory Power Outlet(s).......................... 167
Adding Equipment to Your Airbag-Equipped
Vehicle....................................................... 81
Additives, Fuel............................................ 344
Add-On Electrical Equipment....................... 449
Air Cleaner/Filter, Engine............................. 358
Air Conditioning..................................168, 172
Airbag
Passenger Status Indicator....................... 183
Readiness Light....................................... 182
Airbag Sensing and Diagnostic
Module (SDM).......................................... 489
Airbag System............................................... 66
Adding Equipment to Your
Airbag-Equipped Vehicle......................... 81
How Does an Airbag Restrain?.................. 73
Passenger Sensing System....................... 75
Servicing Your Airbag-Equipped Vehicle..... 80
What Makes an Airbag Inate?.................. 73
What Will You See After an Airbag
Inates?................................................. 74
When Should an Airbag Inate?................. 71
Where Are the Airbags?............................. 68Antenna, Backglass..................................... 283
Antenna, XM™ Satellite Radio
Antenna System....................................... 284
Anti-Lock Brake System (ABS).................... 291
Anti-Lock Brake, System Warning Light....... 187
Appearance Care
Aluminum or Chrome-Plated Wheels........ 444
Care of Safety Belts................................ 442
Chemical Paint Spotting........................... 446
Cleaning Exterior Lamps/Lenses.............. 443
Cleaning the Inside of Your Vehicle.......... 438
Fabric/Carpet........................................... 440
Finish Care.............................................. 443
Finish Damage......................................... 446
Instrument Panel, Vinyl, and Other
Plastic Surfaces.................................... 441
Leather.................................................... 441
Sheet Metal Damage............................... 445
Tires........................................................ 445
Underbody Maintenance........................... 446
Vehicle Care/Appearance Materials.......... 447
Washing Your Vehicle .............................. 442
Weatherstrips........................................... 442
Windshield and Wiper Blades................... 444
Ashtray(s).................................................... 168
497