2-31 To Use the Engine Coolant Heater
1. Turn off the engine.
2. Open the hood and unwrap the electrical cord.
The cord is attached to the outside of the underhood
fuse box.
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
a fire. You could be seriously injured. Plug the
cord into a properly grounded three
-prong
11 0
-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.
2-89
On the 3800 V6 engine, the oil pressure should be
20 to 120 psi (140 to 827 kPa). On the 5.7L V8 engine,
oil pressure should be 20 to 80 psi (140 to 550 kPa).
In certain situations such as long, extended idles on hot
days, it could read as low as 6 psi (40 kPa) and still
be considered normal. It may vary with engine speed,
outside temperature and oil viscosity, but readings above
the red area show the normal operating range. Readings
in the red area tell you that the engine is low on oil,
or that you might have some other oil problem.
See ªEngine Oilº in the Index.
CAUTION:
Don't keep driving if the oil pressure is low. If you
do, your engine can become so hot that it catches fire.
You or others could be burned. Check your oil as
soon as possible and have your vehicle serviced.
NOTICE:
Damage to your engine from neglected oil problems
can be costly and is not covered by your warranty.
5-8
NOTICE:
Use the proper towing equipment to avoid
damage to the bumper, fascia or fog lamp areas
of the vehicle.
With current trends in automotive styles and design, it
is essential that the correct towing equipment is used to
tow a vehicle. Your vehicle can be towed with wheel
-lift
or car
-carrier equipment.
Consult your dealer or a professional towing service if
you need to have your vehicle towed. See ªRoadside
Assistanceº in the Index.
Engine Overheating
You will find a coolant temperature gage on your
instrument panel cluster. See ªEngine Coolant
Temperature Gageº in the Index.
Overheated Engine Protection
Operating Mode
This emergency operating mode allows your vehicle
to be driven to a safe place in an emergency situation.
Should an overheated engine condition exist, an
overheat protection mode which alternates firing groups
of cylinders helps prevent engine damage. In this mode,
you will notice a significant loss in power and engine
performance. The CHECK GAGES light may come
on and the temperature gage will indicate an overheat
condition exists. 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 and change the oil.
See ªEngine Oilº in the Index.
6-16
3800 V6 EngineAs shown in the chart, if you have the 3800 V6 engine,
SAE 10W
-30 is best for your vehicle. However, you can
use SAE 5W
-30 if it's going to be colder than 60F
(16C) before your next oil change. When it's very cold,
you should use SAE 5W
-30. These numbers on an oil
container show its viscosity, or thickness. Do not use
other viscosity oils, such as SAE 20W
-50.
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 where the temperature falls below
-20F (-29C), consider using 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.
6-17 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
Your vehicle has a computer that lets you know
when to change your engine oil. This is not based on
mileage, but on engine revolutions and engine operating
temperature. When the computer has calculated that
the oil needs changing, the GM Oil Life System will
indicate that a change is necessary. The mileage between
oil and filter changes will vary depending on how you
drive your vehicle
-- usually between 3,000 miles
(5 000 km) and 7,500 miles (12 500 km) since your
last oil and filter change. Under severe conditions, the
system may come on before 3,000 miles (5 000 km).
Never drive your vehicle more than 7,500 miles
(12 500 km) or 12 months (whichever occurs first)
without an oil change.
The system won't detect dust in the oil. So, if you
drive in a dusty area, be sure to change your oil
and filter every 3,000 miles (5 000 km) or sooner.
Remember to reset the OIL CHANGE light
whenever the oil is changed.How to Reset the Oil Change Light
After changing the engine oil, the system must be reset.
1. Turn the ignition key to RUN and with the engine
turned off.
2. Push the TRIP/OIL RESET button located on the
instrument panel for 12 seconds.The OIL CHANGE
light will start to flash to confirm that the system is
reset. The reset is complete when the OIL CHANGE
light goes out.
What to Do with Used Oil
Did you know that used engine oil contains certain elements
that may be unhealthy for your skin and could even cause
cancer? Don't let used oil stay on your skin for very long.
Clean your skin and nails with soap and water, or a good
hand cleaner. Wash or properly throw away clothing or
rags containing used engine oil. (See the manufacturer's
warnings about the use and disposal of oil products.)
Used oil can be a real threat to the environment. If you
change your own oil, be sure to drain all free
-flowing
oil from the filter before disposal. Don't ever dispose of
oil by putting it in the trash, pouring it on the ground,
into sewers, or into streams or bodies of water. Instead,
recycle it by taking it to a place that collects used oil. If
you have a problem properly disposing of your used oil,
ask your dealer, a service station or a local recycling
center for help.
6-20
4. Close the cover without an overlap (clamp will not
latch with an overlap) and latch the clamps.
Automatic Transmission Fluid
When to Check and Change
A good time to check your automatic transmission fluid
level is when the engine oil is changed.
Change both the fluid and filter every 15,000 miles
(25 000 km) if the vehicle is mainly driven under one
or more of these conditions:
In heavy city traffic where the outside temperature
regularly reaches 90F (32C) or higher.
In hilly or mountainous terrain.
Uses such as high performance operation.
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 the fluid and filter every 50,000 miles (83 000 km).
See ªScheduled Maintenance Servicesº in the Index.
6-26
Engine Coolant
The cooling system in your vehicle is filled 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 occurs first, 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 or if you need to add coolant to your
radiator, see ªEngine Overheatingº in the Index.
A 50/50 mixture of clean, drinkable water and
DEX
-COOL coolant will:
Give freezing protection down to
-34F (-37C).
Give boiling protection up to 265F (129C).
Protect against rust and corrosion.
Help keep the proper engine temperature.
Let the warning lights 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 occurs first. Damage caused by the
use of coolant other than DEX
-COOL is not
covered by your new vehicle warranty.
6-67 Engine Specifications
Type
VIN Engine Code K V6. . . . . . . . . . . . . . . . . . . . . .
VIN Engine Code G V8. . . . . . . . . . . . . . . . . . . . . .
Fuel DeliveryFuel Injection . . . . . . . . . . . . . . . . . . .
Valve ArrangementIn
-Head . . . . . . . . . . . . . . . . . . .
Displacement
3800 V6 231 cubic inches (3791 cc). . . . . . . . . . . . .
5.7L V8 346 cubic inches (5665 cc). . . . . . . . . . . . .
Firing Order
3800 V6 1
-6-5-4-3-2 . . . . . . . . . . . . . . . . . . . . . . . .
5.7L V8 1
-8-7-2-6-5-4-3 . . . . . . . . . . . . . . . . . . . . .
Wheel Nut Torque100 lb
-ft (140 N´m) . . . . . . . . . .
Thermostat Temperature Specification
3800 V6 195F (91C) . . . . . . . . . . . . . . . . . . . . . . .
5.7L V8 180F (82C) . . . . . . . . . . . . . . . . . . . . . . .
Normal Maintenance
Replacement Parts
Engine Air Cleaner/FilterA917C . . . . . . . . . . . . . . .
Battery75
-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil Filter
3800 V6 PF47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.7L V8 PF44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel Filter
3800 V6 G627. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.7L V8 GF578. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCV Valve
3800 V6 CV892C. . . . . . . . . . . . . . . . . . . . . . . . . . .
5.7L V8 CV948C. . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator CapRC24 . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark Plug
3800 V6 41
-921 (0.060 inch gap) . . . . . . . . . . . . . . .
5.7L V8 41
-952 (0.060 inch gap) . . . . . . . . . . . . . . .
Windshield Wiper Blade Replacement
Type Hook. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Length 24.0 inches (60.1 cm). . . . . . . . . . . . . . . . . .
Vehicle Dimensions
Length193.5 inches (491.5 cm) . . . . . . . . . . . . . . . . .
Width74.1 inches (188.3 cm) . . . . . . . . . . . . . . . . . . .
Height
Coupe 51.3 inches (130.3 cm). . . . . . . . . . . . . . . . .
Convertible 52.0 inches (131.2 cm). . . . . . . . . . . . .
Wheelbase101.1 inches (256.6 cm) . . . . . . . . . . . . . .
Tread
Front 60.7 inches (154.2 cm). . . . . . . . . . . . . . . . . .
Rear 60.6 inches (154.0 cm). . . . . . . . . . . . . . . . . . .