2003 PONTIAC GRAND AM check engine

Checking Things Under
the Hood
Hood Release
To open the hood, do the following:
1. Pull the handle located
under the instrument
panel on the drivier's side
of the vehicle.
L% CAUTION:
An electric fan under the hood can start up
and injure you even when the engine is not running. Keep hands, clothing and tools away
from any underhood electric fan.
Things that burn can get on hot engine parts
and start
a fire. These include liquids like fuel,
oil, coolant, brake fluid, windshield washer and
other fluids, and plastic or rubber. You or
others could be burned. Be careful not to drop
or spill things that will burn onto a hot engine.
I
5-1 0

Engine Oil
LOW
Ole
3400 V6 Engine Only
If the LOW OIL light
appears on the instrument
cluster, it means you
need to check your engine
oil level right away.
Checking Engine Oil
It’s a good idea to check your engine oil every time you
get fuel. In order to get an accurate reading, the oil
must be warm and the vehicle must be on level ground.
For more information, see
Low Oil Level Light on
page 3-35.
You should check your engine oil level regularly; this is
an added reminder.
2.2L L4 ECOTEC Engine
5-1 5

3400 V6 Engine
The engine oil dipstick handle is yellow. The dipstick on
the
2.2L L4 ECOTEC engine is located at the front of
the engine compartment. The dipstick on the 3400
V6 engine is located at the front of the engine, behind
the fan. See
Engine Compartment Overview on
page 5-12 for more information on location.
Turn
off the engine and give the oil several minutes to
drain back into the oil pan. If you don't, the oil
dipstick might not show the actual level.
Pull out the dipstick and clean it with a paper towel or
cloth, then push it back in all the way. Remove it again,
keeping the tip down, and check the level.
2.2L L4 ECQTEC Engine
3400 V6 Engine
5-1 6

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 cannot find such SAE 5W-30 oils,
you can use an SAE IOW-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
IOW-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), it is
recommended that you use either an SAE 5W-30
synthetic oil or an SAE OW-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 ail you will need for
good performance and engine protection.
When to Change Engine Oil (GNI Oil
Life SystemTM)
Your vehicle has a computer system that lets you know
when to change the engine oil and filter. 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 OIL light 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 and filter must be
changed at least once a year and at this time the system
must be reset. It is also important to check vour 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.
5-1 9

Engine Air Cleanedfilter
2.2L L4 ECOTEC Engine shown, 3400 V6 Engine
similar
The engine air cleanedfilter is located in the engine
compartment on the driver’s side of the vehicle.
more information on location.
v’lru ~tayt~~u VVII~~U~L~~~C/II~ VYUL Y,UYY VI, yuyu u IL IVI Cnn f‘nmnovtmnrrt fbtnnt;-tA, nn -T)NP, E iq Car
To check or replace the engine air cleanedfilter, do the
following:
1. Remove the screws that hold the cover on.
3. Check or replace the engine air cleanedfilter.
4. Put the cover back on tightly.
Refer to the Maintenance Schedule
to determine when
to replace the air filter.
See
Part A: Scheduled Maintenance Services on
page 6-4.
Operating the engine with the air cleanerifilter
off can cause you or others to be burned. The
air cleaner not only cleans the air,
it stops
flame if the engine backfires. If
it isn’t there
and the engine backfires, you could be burned. Don’t drive with
it off, and be careful working
on the engine with the air cleanedfilter
off.
ivsrrce: ~i the air cieaneritiiter is oii, a backiire can
cause a damaging engine fire. And, dirt can
easily get into your engine, which will damage
it.
Always have the air cleanerifilter in place when
you’re driving.
2. Lift off the cover.
5-2 1

Hydraulic Clutch
The hydraulic clutch linkage in your vehicle is
self-adjusting. The clutch master cylinder reservoir is
filled with hydraulic clutch fluid.
It is not necessary
to regularly check clutch fluid unless
you suspect there is a leak in the system. Adding
fluid won’t correct a leak.
A fluid
loss in this system could indicate a problem.
Have the system inspected and repaired.
When to Check and What to Use
Refer to the Maintenance
Schedule
to determine
how often you should
check the fluid level in your
master cylinder reservoir
and for the proper
fluid. See
Part B: Owner
Checks and Services
on page
6-9 and Part 19:
Recommended Fluids
and Lubricants on
page
6- 15.
How to Check and Add Fluid
You do not need to check the fluid level unless you
suspect a clutch problem. To check the fluid level, take
the cap
off. If the fluid level reaches the top of the
reservoir, the fluid level is correct. It isn’t a good idea to
top
off your clutch fluid. Adding fluid won’t correct a
leak. A fluid loss in this system could indicate a problem
Have the system inspected and repaired.
Engine Coolant
The cooling system in your vehicle is filled with
QEX-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 QEX-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, see
Engine Overheating on
page
5-26.
5-23

If you have to add coolant more than four times a year, The coolant surge tank is located in the engine
have your dealer check your cooling system. compartment
on the passenger’s side of the vehicle.
Notice: If you use the proper coolant, you don’t
have to add extra inhibitors or additives which claim
to improve the system. These can be harmful. See
Engine Compartment
Overview on page 5-12
for more information on location.
Checking Coolant
1
Turning the surge tank pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids to blow out and burn you
badly. Never turn
the surge tank pressure
cap
- even a little - when the engine and
radiator are hot.
The vehicle must be on a level surface. When your
engine is cold, the coolant level should be at the
FULL
COLD mark, or a little higher.
2.2L L4 ECOTEC Engine shown,
3400 V6 Engine similar
5-25

Heater and radiator hoses, and other engine
parts, can be very hot. Don't touch them. If you
do, you can be burned.
Don't run the engine
if there is a leak. If you
run
the engine, it could lose all coolant. That
could cause an engine fire, and you could be
burned. Get any leak fixed before you drive
the
vehicle.
The coolant level should
be at or above the FULL
COLD mark. If it isn't, you may have a leak at the
pressure cap or in the radiator hoses, heater hoses,
radiator, water pump or somewhere else in the cooling
system.
If there seems to be no leak, with the engine on, check
to see
if the electric engine cooling fans are running.
If the engine is overheating, both fans should be
running.
If they aren't, your vehicle needs service.
Notice: Engine damage from running your engine
without coolant
isn't covered by your warranty.
5-30