2006 PONTIAC GTO engine

Your vehicle's engine is ®lled at the factory with a
Mobil 1žsynthetic oil, which meets all requirements for
your vehicle.
Substitute Engine Oil: When adding oil to maintain
engine oil level, oil meeting GM Standard GM4718M
may not be available. You can add substitute oil
designated SAE 5W-30 with the starburst symbol at all
temperatures. Substitute oil not meeting GM Standard
GM4718M should not be used for an oil change.
Engine Oil Additives
Do not add anything to the oil. The recommended oils
with the starburst symbol that meet GM Standard
GM4718M are all you will need for good performance
and engine protection.
Engine Oil Life System
When to Change Engine Oil
Your vehicle has a computer system that lets you know
when to change the engine oil and ®lter. 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 Service Engine Oil message on the trip
computer display will come on. See
Trip Computer
on page 3-33. Change engine oil as soon as possible
within the next 600 miles (1 000 km). 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, the engine oil and ®lter
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 engine oil regularly and keep it at
the proper level.
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If the system is ever reset accidentally, you must
change the 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.
After changing the engine oil, reset the system by
performing the following steps:
How to Reset the Engine Oil Life
System
The Engine Oil Life System calculates when to change
the engine oil and ®lter based on vehicle use. Anytime
engine oil is changed, reset the system so it can
calculate when the next oil change is required. If a
situation occurs where you change your oil prior to the
Service Engine Oil message being turned on, reset
the system.
1. With the engine off, turn the ignition key to ON.
2. Fully press and release the accelerator pedal slowly
two times within ®ve seconds.
3. Turn the key to LOCK.
If the Service Engine Oil message comes back on
when you start your vehicle, the engine oil life
system has not reset. Repeat the procedure.
What to Do with Used Oil
Used engine oil contains certain elements that may be
unhealthy for your skin and could even cause cancer.
Do not 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 dispose of 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 threat to the environment. If you
change your own oil, be sure to drain all the oil from the
®lter before disposal. Never 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 used oil, ask your
dealer, a service station, or a local recycling center
for help.
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Engine Air Cleaner/Filter
SeeEngine Compartment Overview on page 5-12for
more information on the location of the engine air
cleaner/®lter.
When to Inspect the Engine Air
Cleaner/Filter
Inspect the air cleaner/®lter at every oil change and
replace at the ®rst oil change after 25,000 miles
(41 500 km). See
Scheduled Maintenance on page 6-4for more information.
How to Inspect the Engine Air
Cleaner/Filter
To inspect the air cleaner/®lter, remove the ®lter from
the vehicle and lightly shake the ®lter to release
loose dust and dirt. If the ®lter remains caked with dirt, a
new ®lter is required.
To inspect or replace the engine air cleaner/®lter, do the
following:
1. Remove the screws that hold the cover on.
2. Lift off the cover.
3. Inspect or replace the engine air cleaner/®lter.
4. Put the cover back on tightly.
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{CAUTION:
Operating the engine with the air cleaner/®lter
off can cause you or others to be burned. The
air cleaner not only cleans the air; it helps to
stop ¯ames if the engine back®res. If it is not
there and the engine back®res, you could be
burned. Do not drive with it off, and be careful
working on the engine with the air
cleaner/®lter off.
Notice:If the air cleaner/®lter is off, a back®re can
cause a damaging engine ®re. And, dirt can
easily get into your engine, which will damage it.
Always have the air cleaner/®lter in place when you
are driving.
Automatic Transmission Fluid
When to Check and Change Automatic
Transmission Fluid
A good time to check your automatic transmission ¯uid
level is when the engine oil is changed.
Change the ¯uid and ®lter at the intervals listed in
Additional Required Services on page 6-6, and be sure
to use the transmission ¯uid listed inRecommended
Fluids and Lubricants on page 6-12.
How to Check Automatic Transmission
Fluid
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 little ¯uid can damage
your transmission. Too much can mean that some
of the ¯uid could come out and fall on hot engine
part or exhaust system parts, starting a ®re.
Too little ¯uid could cause the transmission to
overheat. Be sure to get an accurate reading if you
check your transmission ¯uid.
Wait at least 30 minutes before checking the
transmission ¯uid level if you have been driving in the
following conditions:
·When outside temperatures are above 90ÉF (32ÉC).
·At high speed for quite a while.
·In heavy traffic Ð especially in hot weather.
To get the right reading, the ¯uid should be at normal
operating temperature, which is 180ÉF to
200ÉF (82ÉC to 93ÉC).
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Get the vehicle warmed up by driving about 15 miles
(24 km) when outside temperatures are above 50ÉF
(10ÉC). If it is colder than 50ÉF (10ÉC), drive the vehicle
in DRIVE (D) until the engine temperature gage
moves and then remains steady for 10 minutes.
A cold ¯uid check can be made after the vehicle has
been sitting for eight hours or more with the engine off,
but this is used only as a reference. Let the engine
run at idle for ®ve minutes if outside temperatures are
50ÉF (10ÉC) or more. If it is colder than 50ÉF (10ÉC), you
may have to idle the engine longer. Should the ¯uid
level be low during this cold check, you must check the
¯uid hot before adding ¯uid. Checking the ¯uid hot
will give you a more accurate reading of the ¯uid level.
Checking the Fluid Level
Prepare your vehicle as follows:
1. Park your vehicle on a level place. Keep the engine
running.
2. With the parking brake applied, place the shift lever
in PARK (P).
3. With your foot on the brake pedal, move the shift
lever through each gear range, pausing for about
three seconds in each range. Then, position
the shift lever in PARK (P).
4. Let the engine run at idle for three minutes or more.Then, without shutting off the engine, follow these steps:
The automatic transmission dipstick is located at the
rear of the engine compartment, on the passenger's side
of the vehicle. See
Engine Compartment Overview on
page 5-12for more information on location.
1. Unclip the handle and remove the dipstick; wipe it
clean with a clean rag or paper towel and re-insert
it fully. Remove it again and read the ¯uid level.
2. Check both sides of the dipstick, and read the lower
level. The ¯uid level must be in the COLD area for
a cold check or in the cross-hatched HOT area
for a hot check.
3. If the ¯uid level is in the acceptable range, push the
dipstick back in all the way.
Remember to always replace the dipstick and lock
the handle down.
How to Add Automatic Transmission
Fluid
Refer to the Maintenance Schedule to determine what
kind of transmission ¯uid to use. SeeRecommended
Fluids and Lubricants on page 6-12.
Add ¯uid only after checking the transmission ¯uid while
it is hot. A cold check is used only as a reference. If
the ¯uid level is low, add only enough of the proper ¯uid
to bring the level up to the HOT area for a hot check.
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The level should never read over the HOT mark, so be
careful not to add too much. It does not take much
¯uid, generally less than 0.6 pints (0.3 L). Do not over®ll.
Notice:Use of the incorrect automatic transmission
¯uid may damage your vehicle, and the damages
may not be covered by your warranty. Always
use the automatic transmission ¯uid listed in
Recommended Fluids and Lubricants on page 6-12.
·After adding ¯uid, recheck the ¯uid level as
described under ªHow to Check Automatic
Transmission Fluid,º earlier in this section.
·When the correct ¯uid level is obtained, push the
dipstick back in all the way.
Remember to always replace the dipstick and lock
the handle down.
·If ¯uid has to be added often, there may be a
problem or leak and you should see your dealer.
Manual Transmission Fluid
When to Check Manual Transmission
Fluid
A good time to have your manual transmission ¯uid
checked is when the engine oil is changed. However,
the ¯uid in your manual transmission does not
require changing.
How to Check Manual Transmission
Fluid
Because this operation can be 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.
Notice:Too much or too little ¯uid can damage
your transmission. Too much can mean that some
of the ¯uid could come out and fall on hot engine
part or exhaust system parts, starting a ®re.
Too little ¯uid could cause the transmission to
overheat. Be sure to get an accurate reading if you
check your transmission ¯uid.
Check the ¯uid level only when your engine is off, the
vehicle is parked on a level place, and the transmission
is cool enough for you to rest your ®ngers on the
transmission case.
Then, follow these steps:
1. Remove the reverse light switch.
2. Check that the lubricant level is up to the bottom of
the switch hole.
3. If the ¯uid level is good, install the switch and be
sure it is fully seated. If the ¯uid level is low, add
more ¯uid as described in the next steps.
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How to Check and Add Fluid
To check the ¯uid level, look at the markings on the
reservoir. If the ¯uid level is between the MIN and the
MAX line, the ¯uid level is correct. If the ¯uid level
is between these marks do not remove the cap, as the
¯uid will quickly absorb moisture. See
Engine
Compartment Overview on page 5-12for more
information on reservoir location.
If ¯uid does need to be added, ®rst turn the vehicle off.
Remove the cap and add the proper ¯uid. Remember
to replace the cap and clean up any spilled ¯uid.
Engine Coolant
The cooling system in your vehicle is ®lled with
DEX-COOLžengine coolant. This coolant is designed
to remain in the vehicle for ®ve years or 150,000 miles
(240 000 km), whichever occurs ®rst, if only
DEX-COOL
žextended life coolant is added.The following explains the cooling system and how to
add coolant when it is low. If there is a problem
with engine overheating or if coolant needs to be added
to the radiator, see
Engine Overheating on page 5-26.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
žcoolant will:
·Give freezing protection down to-34ÉF (-37ÉC).
·Give boiling protection up to 265ÉF (129ÉC).
·Protect against rust and corrosion.
·Help keep the proper engine temperature.
·Let the warning lights and gages work as
they should.
Notice:Using coolant other than DEX-COOLžmay
cause premature engine, heater core, or radiator
corrosion. In addition, the engine coolant may
require changing sooner, at the ®rst maintenance
service after each 30,000 miles (50 000 km) or
24 months, whichever occurs ®rst. Any repairs
would not be covered by your warranty. Always use
DEX-COOL
ž(silicate-free) coolant in your vehicle.
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What to Use
Use a mixture of one-half clean, drinkable water and
one-half DEX-COOLžcoolant which will not damage
aluminum parts. If this coolant mixture is used, nothing
else needs to be added.
{CAUTION:
Adding only plain water to your cooling
system can be dangerous. Plain water, or
some other liquid such as alcohol, can boil
before the proper coolant mixture will. Your
vehicle's coolant warning system is set for the
proper coolant mixture. With plain water or the
wrong mixture, your engine could get too hot
but you would not get the overheat warning.
Your engine could catch ®re and you or others
could be burned. Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
žcoolant.
Notice:If you use an improper coolant mixture,
your engine could overheat and be badly damaged.
The repair cost would not be covered by your
warranty. Too much water in the mixture can freeze
and crack the engine, radiator, heater core and
other parts.If coolant needs to be added more than four times a
year, have your dealer check the cooling system.
Notice:If you use extra inhibitors and/or additives
in your vehicle's cooling system, you could
damage your vehicle. Use only the proper mixture
of the engine coolant listed in this manual for
the cooling system. See
Recommended Fluids and
Lubricants on page 6-12for more information.
Checking Coolant
The coolant over¯ow reservoir is located in the engine
compartment on the driver's side of the vehicle. See
Engine Compartment Overview on page 5-12for more
information on location.
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