2003 BUICK RANDEZVOUS oil temperature

Engine Coolant Heater
Your vehicle may have an engine coolant heater. In
very cold weather, 0°F(−18°C) or colder, the engine
coolant heater can help. You’ll get easier starting
and better fuel economy during engine warm-up.
Usually, the coolant heater should be plugged in a
minimum of four hours prior to starting your vehicle.
At temperatures above 32°F(0°C), use of the coolant
heater is not required.
To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord. The
electrical cord is located on the driver’s side of the
engine compartment.
3. Plug it into a normal, grounded 110-volt AC outlet.
{CAUTION:
Plugging the cord into an ungrounded outlet
could cause an electrical shock. Also, the
wrong kind of extension cord could overheat
and cause afire. You could be seriously
injured. Plug the cord into a properly grounded
three-prong 110-volt AC outlet. If the cord
won’t reach, use a heavy-duty three-prong
extension cord rated for at least 15 amps.
4. Before starting the engine, be sure to unplug and
store the cord as it was before to keep it away
from moving engine parts. If you don’t, it could be
damaged.
How long should you keep the coolant heater plugged
in? The answer depends on the outside temperature, the
kind of oil you have, and some other things. Instead
of trying to list everything here, we ask that you contact
your dealer in the area where you’ll be parking your
vehicle. The dealer can give you the best advice for that
particular area.
2-21
2003 - Rendezvous OM

Instrument Panel Overview...............................3-4
Hazard Warning Flashers................................3-5
Other Warning Devices...................................3-6
Horn .............................................................3-6
Tilt Wheel.....................................................3-6
Turn Signal/Multifunction Lever.........................3-7
Exterior Lamps.............................................3-12
Interior Lamps..............................................3-14
Instrument Panel Switchbank..........................3-18
Head-Up Display (HUD).................................3-18
Ultrasonic Rear Parking Assist (URPA)............3-21
Accessory Power Outlets...............................3-23
Ashtrays and Cigarette Lighter........................3-24
Climate Controls............................................3-24
Climate Control System.................................3-24
Dual Climate Control System..........................3-27
Dual Automatic Climate Control System...........3-29
Outlet Adjustment.........................................3-32
Warning Lights, Gages and Indicators.............3-33
Instrument Panel Cluster................................3-34
Speedometer and Odometer...........................3-35
Tachometer.................................................3-36
Safety Belt Reminder Light.............................3-37
Air Bag Readiness Light................................3-37
Brake System Warning Light
..........................3-38
Anti-Lock Brake System Warning Light
.............3-39Traction Control System (TCS) Warning Light......3-39
Engine Coolant Temperature Gage..................3-40
Malfunction Indicator Lamp.............................3-40
Cruise Control Light......................................3-43
Fuel Gage...................................................3-43
Message Center.............................................3-44
Service Traction System Warning Message......3-44
Traction Active Message................................3-45
Engine Coolant Temperature Warning
Message..................................................3-45
Charging System Indicator Message................3-46
Low Oil Pressure Message............................3-46
Low Engine Oil Level Message.......................3-47
Change Engine Oil Message..........................3-47
Low Tire Message........................................3-48
Door Ajar Warning Message...........................3-48
Rear Hatch Ajar Warning Message..................3-48
PASS-Key
®III Security Message....................3-49
All-Wheel Drive Disable Warning Message.......3-49
Low Washer Fluid Warning Message...............3-50
Low Fuel Warning Message
...........................3-50
Low Brake Fluid Warning Message
.................3-51
Service Vehicle Soon Message
.......................3-51
Program Mode Message
................................3-52
Remote Keyless Entry Transmitter Battery
Low Warning Message
...............................3-52
Section 3 Instrument Panel
3-1
2003 - Rendezvous OM

Instrument Panel Switchbank
There is an instrument panel switchbank located below
the comfort controls. It contains switches or blanks
that will vary with the options that are on your vehicle.
The switches you may have are:
•Rear Window Wiper/Washer
•Liftgate Release
•Traction Disable
•Park Aid Disable
•Heated Seats (driver’s and passenger’s)
For more information, see each of these features in the
Index.
Head-Up Display (HUD)
{CAUTION:
If the HUD image is too bright, or too high in
your field of view, it may take you more time to
see things you need to see when it’s dark
outside. Be sure to keep the HUD image dim
and placed low in your field of view.If your vehicle has the HUD, it can display the
speedometer reading in English or metric. The current
radio station, CD number and/or track number or
tape may also be displayed and will appear as an image
focused out toward the front of your vehicle.
The HUD is capable of displaying English or French.
SeeDIC Controls and Displays on page 3-55to change
the display from English to metric.
The Head-Up Display also displays the following lights
and messages when they appear on the instrument
panel cluster:
•Turn Signal Indicators
•High-Beam Indicator
•Low-Fuel Warning Message
See each of these features in the Index for more
information.
The Head-Up Display also displays a CHECK GAGES
icon. The following messages could appear on the
instrument panel cluster when CHECK GAGES appears:
•Engine Coolant Temperature Warning
•Low Oil Pressure
•Charging System Indicator
•Low Brake Fluid Warning
3-18
2003 - Rendezvous OM

As in the chart shown previously, SAE 5W-30 is the
only viscosity grade recommended for your vehicle. You
should look for and use only oils which have the API
Starburst symbol and which are also identified as
SAE 5W-30. If you cannotfind such SAE 5W-30 oils,
you can use an SAE 10W-30 oil which has the API
Starburst symbol, if it’s going to be 0°F(−18°C)
or above. Do not use other viscosity grade oils, such as
SAE 10W-40 or SAE 20W-50 under any conditions.
Notice:Use only engine oil with the American
Petroleum Institute Certified For Gasoline Engines
starburst symbol. Failure to use the recommended
oil can result in engine damage not covered by
your warranty.
GM Goodwrench
®oil meets all the requirements for
your vehicle.
If you are in an area of extreme cold, where the
temperature falls below−20°F(−29°C),itis
recommended that you use either an SAE 5W-30
synthetic oil or an SAE 0W-30 oil. Both will provide
easier cold starting and better protection for your engine
at extremely low temperatures.
Engine Oil Additives
Don’t add anything to your oil. The recommended oils
with the starburst symbol are all you will need for
good performance and engine protection.
When to Change Engine Oil (GM Oil
Life System)
Your vehicle has a computer system that lets you know
when to change the engine oil andfilter. This is
based on engine revolutions and engine temperature,
and not on mileage. Based on driving conditions,
the mileage at which an oil change will be indicated can
vary considerably. For the oil life system to work
properly, you must reset the system every time the oil is
changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A change engine oil message will come on.
Change your oil as soon as possible within the next
two times you stop for fuel. It is possible that, if you are
driving under the best conditions, the oil life system
may not indicate that an oil change is necessary for over
a year. However, your engine oil andfilter must be
changed at least once a year and at this time the system
must be reset. It is also important to check your oil
regularly and keep it at the proper level.
If the system is ever reset accidentally, you must
change your oil at 3,000 miles (5 000 km) since your
last oil change. Remember to reset the oil life system
whenever the oil is changed.
5-14
2003 - Rendezvous OM

Automatic Transaxle Fluid
When to Check and Change
A good time to check your automatic transaxlefluid
level is when the engine oil is changed.
Change both thefluid andfilter every 50,000 miles
(83 000 km) if the vehicle is mainly driven under one or
more of these conditions:
•In heavy city traffic where the outside temperature
regularly reaches 90°F (32°C) or higher.
•In hilly or mountainous terrain.
•When doing frequent trailer towing.
•Uses such as found in taxi, police or delivery
service.
If you do not use your vehicle under any of these
conditions, change thefluid andfilter at 100,000 miles
(166 000 km).
SeePart A: Scheduled Maintenance Services on
page 6-4.
How to Check
Because this operation can be a little difficult, you may
choose to have this done at the dealership service
department.
If you do it yourself, be sure to follow all the instructions
here, or you could get a false reading on the dipstick.Notice:Too much or too littlefluid can damage
your transaxle. Too much can mean that some of the
fluid could come out and fall on hot engine or
exhaust system parts, starting afire. Too littlefluid
could cause the transaxle to overheat. Be sure
to get an accurate reading if you check your
transaxlefluid.
Wait at least 30 minutes before checking the transaxle
fluid level if you have been driving:
•When outside temperatures are above 90°F (32°C).
•At high speed for quite a while.
•In heavy traffic - especially in hot weather.
To get the right reading, thefluid should be at normal
operating temperature, which is 180°Fto200°F
(82°Cto93°C).
Get the vehicle warmed up by driving about 15 miles
(24 km) when outside temperatures are above 50°F
(10°C).Ifit’s colder than 50°F (10°C), you may have to
drive longer.
Checking the Fluid Level
Prepare your vehicle as follows:
•Park your vehicle on a level place. Keep the engine
running.
•With the parking brake applied, place the shift lever
in PARK (P).
5-17
2003 - Rendezvous OM

Notice:We recommend you use onlyfluid labeled
DEXRON®-III, becausefluid with that label is
made especially for your automatic transmission.
Damage caused byfluid other than DEXRON
®-III is
not covered by your new vehicle warranty.
3. After addingfluid, recheck thefluid level as
described under“How to Check.”
4. When the correctfluid level is obtained, push the
dipstick back in all the way.
Engine Coolant
The cooling system in your vehicle isfilled with
DEX-COOL®engine coolant. This coolant is designed
to remain in your vehicle for 5 years or 150,000 miles
(240 000 km), whichever occursfirst, if you add
only DEX-COOL
®extended life coolant.
The following explains your cooling system and how to
add coolant when it is low. If you have a problem
with engine overheating, seeEngine Overheating on
page 5-22.A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
•Give freezing protection down to−34°F(−37°C).
•Give boiling protection up to 265°F (129°C).
•Protect against rust and corrosion.
•Help keep the proper engine temperature.
•Let the warning messages and gages work as they
should.
Notice:When adding coolant, it is important that
you use only DEX-COOL
®(silicate-free) coolant.
If coolant other than DEX-COOL®is added to
the system, premature engine, heater core or
radiator corrosion may result. In addition, the engine
coolant will require change sooner -- at 30,000 miles
(50,000 km) or 24 months, whichever occursfirst.
Damage caused by the use of coolant other
than DEX-COOL
®is not covered by your new vehicle
warranty.
5-19
2003 - Rendezvous OM

Engine Overheating
You willfind an engine coolant temperature gage on
your vehicle’s instrument panel. SeeEngine Coolant
Temperature Gage on page 3-40. You also have
an engine coolant temperature warning message on
your instrument panel. SeeEngine Coolant Temperature
Warning Message on page 3-45.
Overheated Engine Protection
Operating Mode
This emergency operating mode allows your vehicle to
be driven to a safe place in an emergency situation.
If an overheated engine condition exists, an overheat
protection mode which alternatesfiring groups of
cylinders helps prevent engine damage. In this mode,
you will notice a significant loss in power and engine
performance. The temperature gage will indicate
an overheat condition exists. Driving extended miles
(km) and/or towing a trailer in the overheat protection
mode should be avoided.
Notice:After driving in the overheated engine
protection operating mode, to avoid engine damage,
allow the engine to cool before attempting any repair.
The engine oil will be severely degraded. Repair the
cause of coolant loss, change the oil and reset the oil
life system. See“Engine Oil”in the Index.
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
CAUTION: (Continued)
5-22
2003 - Rendezvous OM

Scheduled Maintenance
The services shown in this schedule up to 100,000 miles
(166 000 km) should be repeated after 100,000 miles
(166 000 km) at the same intervals for the life of
this vehicle. The services shown at 150,000 miles
(240 000 km) should be repeated at the same interval
after 150,000 miles (240 000 km) for the life of this
vehicle.
SeePart B: Owner Checks and Services on page 6-9
andPart C: Periodic Maintenance Inspections on
page 6-13.
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.
@Whenever the tires are rotated, the Check Tire
Pressure System (if equipped) must be reset.
+A good time to check your brakes is during tire
rotation. See Brake System Inspection on page 6-14.
Engine Oil Scheduled Maintenance
Change engine oil and filter as indicated by the GM
Oil Life System (or every 12 months, whichever
occurs first). Reset the system.
Your vehicle has a computer system that lets you know
when to change the engine oil andfilter. This is
based on engine revolutions and engine temperature,
and not on mileage. Based on driving conditions,
the mileage at which an oil change will be indicated can
vary considerably. For the oil life system to work
properly, you must reset the system every time the oil is
changed.
When the system has calculated that oil life has been
diminished, it will indicate that an oil change is
necessary. A CHANGE ENGINE OIL message will
come on. Change your oil as soon as possible within
the next two times you stop for fuel. It is possible that, if
you are driving under the best conditions, the oil life
system may not indicate that an oil change is necessary
for over a year. However, your engine oil andfilter
must be changed at least once a year and at this time
the system must be reset. Your dealer has GM-trained
service people who will perform this work using
genuine GM parts and reset the system.
It is also important to check your oil regularly and keep
it at the proper level.
6-5
2003 - Rendezvous OM