2003 BUICK RANDEZVOUS coolant level

6. Start the engine and let it run until you can feel the
upper radiator hose getting hot. Watch out for the
engine cooling fans.
7. By this time, the coolant level inside the radiator
filler neck may be lower. If the level is lower, add
more of the proper DEX-COOL
®coolant mixture
through thefiller neck until the level reaches
the base of thefiller neck.8. Then replace the pressure cap. At any time during
this procedure if coolant begins toflow out of the
filler neck, reinstall the pressure cap. Be sure
the arrows on the pressure cap line up like this.
5-30
2003 - Rendezvous OM

•Don’t use engine coolant (antifreeze) in your
windshield washer. It can damage your
washer system and paint.
Brakes
Brake Fluid
Your brake master cylinder reservoir isfilled with DOT-3
brakefluid. SeeEngine Compartment Overview on
page 5-10for the location of the reservoir.
There are only two reasons why the brakefluid level in
the reservoir might go down. Thefirst is that the
brakefluid goes down to an acceptable level duringnormal brake lining wear. When new linings are put in,
thefluid level goes back up. The other reason is
thatfluid is leaking out of the brake system. If it is, you
should have your brake systemfixed since a leak
means that sooner or later your brakes won’t work well,
or won’t work at all.
So, it isn’t a good idea to“top off”your brakefluid.
Adding brakefluid won’t correct a leak. If you addfluid
when your linings are worn, then you’ll have too
muchfluid when you get new brake linings. You should
add (or remove) brakefluid, as necessary, only when
work is done on the brake hydraulic system.
{CAUTION:
If you have too much brakefluid, it can spill on
the engine. Thefluid will burn if the engine is
hot enough. You or others could be burned,
and your vehicle could be damaged. Add brake
fluid only when work is done on the brake
hydraulic system.
5-33
2003 - Rendezvous OM

Part B: Owner Checks and Services
Listed in this part are owner checks and services
which should be performed at the intervals specied to
help ensure the safety, dependability and emission
control performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever anyuids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
in Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuelfill.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-11for further
details.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-19for further details.
Windshield Washer Fluid Level Check
Check the windshield washeruid level in the windshield
washer tank and add the properuid if necessary.
SeeWindshield Washer Fluid on page 5-32for further
details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inated to the correct pressures.
Don’t forget to check your spare tire. SeeTires on
page 5-48for further details.
Cassette Tape Player Service
Clean cassette tape player. Cleaning should be done
every 50 hours of tape play. SeeAudio System(s)
on page 3-64for further details.
At Least Twice a Year
Restraint System Check
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.
6-9
2003 - Rendezvous OM

Driving (cont.)
Defensive..................................................... 4-3
Drunken....................................................... 4-4
Environment................................................. 4-2
Freeway.....................................................4-21
Hill and Mountain Roads..............................4-24
In Rain and on Wet Roads...........................4-18
Winter........................................................4-25
Driving On Grades..........................................4-40
Driving on Snow or Ice....................................4-26
Driving Through Deep Standing Water...............4-19
Driving Through Flowing Water.........................4-20
Driving with a Trailer.......................................4-38
Dual Automatic Climate Control System.............3-29
Dual Climate Control System............................3-27
DVD
Cleaning the Video Screen..........................3-110
Cleaning Your DVD Player..........................3-109
Distortion..................................................3-107
Rear Seat Entertainment System...................3-93
DVD Messages..............................................3-98
DVD Player....................................................3-96
E
Electrical System
Add-On Equipment......................................5-85
Fuses and Circuit Breakers...........................5-86
Headlamp Wiring.........................................5-86
Power Windows and Other Power Options......5-86Electrical System (cont.)
Windshield Wiper Fuses...............................5-86
Emissions Inspection and Maintenance
Programs...................................................3-42
Engine
Air Cleaner/Filter.........................................5-15
Battery.......................................................5-36
Change Oil Message...................................3-47
Check and Service Engine Soon Light............3-40
Compartment Overview................................5-10
Coolant......................................................5-19
Coolant Heater............................................2-21
Coolant Temperature Gage...........................3-40
Coolant Temperature Warning Message..........3-45
Cooling System Inspection............................6-13
Exhaust.....................................................2-29
Low Oil Level Message................................3-47
Oil .............................................................5-11
Overheating................................................5-22
Starting......................................................2-20
Engine Coolant Level Check.............................. 6-9
Engine Oil Additives........................................5-14
Engine Oil Level Check..................................... 6-9
Engine Specifications......................................5-93
Entering Programming Mode
....................2-46, 3-57
Entertainment System
Cleaning the Video Screen
..........................3-110
Cleaning Your DVD Player
..........................3-109
DVD Distortion
..........................................3-107
Entry Lighting
.................................................3-15
5
2003 - Rendezvous OM

Maintenance When Trailer Towing.....................4-41
Making Turns.................................................4-39
Malfunction Indicator Light................................3-40
Manual Lumbar Controls.................................... 1-4
Manual Operation...........................................3-30
Manual Passenger Seat.................................... 1-2
Matching Transmitter(s) to Your Vehicle............... 2-7
Memory Seat.................................................2-52
Message
All-Wheel Drive Disable Warning....................3-49
Center.......................................................3-44
Change Engine Oil......................................3-47
Charging System Indicator............................3-46
Door Ajar Warning.......................................3-48
Engine Coolant Temperature Warning.............3-45
Highbeam Out Warning................................3-53
Low Brake Fluid Warning..............................3-51
Low Engine Oil Level...................................3-47
Low Fuel Warning.......................................3-50
Low Oil Pressure.........................................3-46
Low Tire .....................................................3-48
Low Washer Fluid Warning
...........................3-50
Park Lamp Warning
.....................................3-53
PASS-Key
®III Security
.................................3-49
Program Mode
............................................3-52
Rear Hatch Ajar Warning
..............................3-48
Remote Keyless Entry Transmitter Battery
Low Warning
...........................................3-52
Service Traction System Warning
...................3-44
Service Vehicle Soon
...................................3-51Message (cont.)
Traction Active............................................3-45
Mexico, Central America and Caribbean
Islands/Countries (Except Puerto Rico
and U.S. Virgin Islands)................................. 7-4
Mirrors
Automatic Dimming Rearview........................2-31
Manual Rearview Mirror................................2-31
Outside Convex Mirror.................................2-32
Outside Curb View Assist Mirror....................2-32
Outside Heated Mirrors................................2-32
Outside Power Mirror...................................2-31
MyGMLink.com................................................ 7-3
N
New Vehicle Break-In......................................2-18
Normal Maintenance Replacement Parts............5-93
O
Odometer......................................................3-35
Off-Road Recovery..........................................4-13
Oil
Engine.......................................................5-11
Pressure Message.......................................3-46
Older Children, Restraints................................1-45
Online Owner Center........................................ 7-3
OnStar
®Personal Calling.................................2-33
OnStar®Services............................................2-33
10
2003 - Rendezvous OM