engine PONTIAC GRAND PRIX 2007 Owners Manual

If your vehicle has the 3800 Supercharged V6
engine (VIN Code 4) or the 5.3L V8 engine (VIN
Code C), use premium unleaded gasoline with
a posted octane rating of 91 or higher. You may
also use regular unleaded gasoline rated at
87 octane or higher, but your vehicle’s acceleration
may be slightly reduced, and you may notice a
slight audible knocking noise, commonly referred
to as spark knock. If the octane is less than
87, you may notice a heavy knocking noise when
you drive. If this occurs, use a gasoline rated
at 87 octane or higher as soon as possible.
Otherwise, you might damage your engine. If you
are using gasoline rated at 87 octane or higher
and you hear heavy knocking, your engine needs
service.Gasoline Specications
At a minimum, gasoline should meet ASTM
specication D 4814 in the United States or
CAN/CGSB-3.5 in Canada. Some gasolines may
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl
(MMT). General Motors recommends against the
use of gasolines containing MMT. SeeAdditives
on page 340for additional information.
339

California Fuel
If your vehicle is certied to meet California
Emissions Standards, it is designed to operate on
fuels that meet California specications. See
the underhood emission control label. If this fuel is
not available in states adopting California
emissions standards, your vehicle will operate
satisfactorily on fuels meeting federal
specications, but emission control system
performance may be affected. The malfunction
indicator lamp may turn on and your vehicle may
fail a smog-check test. SeeMalfunction Indicator
Lamp on page 180. If this occurs, return to
your authorized GM dealer for diagnosis. If it is
determined that the condition is caused by the type
of fuel used, repairs may not be covered by
your warranty.
Additives
To provide cleaner air, all gasolines in the United
States are now required to contain additives
that will help prevent engine and fuel system
deposits from forming, allowing your emission
control system to work properly. In most cases,
you should not have to add anything to your fuel.
However, some gasolines contain only the
minimum amount of additive required to meet
U.S. Environmental Protection Agency regulations.
To help keep fuel injectors and intake valves
clean, or if your vehicle experiences problems due
to dirty injectors or valves, look for gasoline that
is advertised as TOP TIER Detergent Gasoline.
Also, your dealer has additives that will help
correct and prevent most deposit-related problems.
340

Filling the Tank
{CAUTION:
Fuel vapor burns violently and a fuel re
can cause bad injuries. To help avoid
injuries to you and others, read and follow
all the instructions on the pump island.
Turn off your engine when you are
refueling. Do not smoke if you are near
fuel or refueling your vehicle. Keep
sparks, ames, and smoking materials
away from fuel. Do not leave the fuel
pump unattended when refueling your
vehicle. This is against the law in some
places. Keep children away from the fuel
pump; never let children pump fuel.The tethered fuel cap is located behind a hinged
fuel door on the driver’s side of the vehicle.
To remove the fuel cap, turn it slowly
counterclockwise. The fuel cap has a spring in it; if
the cap is released too soon, it will spring back
to the right.
While refueling, let the fuel cap hang by the tether
below the fuel ll opening.
342

Filling a Portable Fuel Container
{CAUTION:
Never ll a portable fuel container while it
is in your vehicle. Static electricity
discharge from the container can ignite the
gasoline vapor. You can be badly burned
and your vehicle damaged if this occurs.
To help avoid injury to you and others:
Dispense gasoline only into approved
containers.
Do not ll a container while it is inside a
vehicle, in a vehicle’s trunk, pickup
bed, or on any surface other than the
ground.
Bring the ll nozzle in contact with the
inside of the ll opening before
operating the nozzle. Contact should
be maintained until the lling is
complete.
Do not smoke while pumping gasoline.
Checking Things Under
the Hood
{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.
{CAUTION:
Things that burn can get on hot engine
parts and start a re. These include
liquids like fuel, oil, coolant, brake uid,
windshield washer and other uids, 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.
344

Hood Release
To open the hood, do the following:
1. Pull the hood release handle with this
symbol on it. It is located inside the
vehicle near the parking brake pedal.2. Go to the front of the vehicle and release the
secondary hood latch, located near the center
front of the engine compartment, by moving
it to the right.
3. Lift the hood.
Before closing the hood, be sure all the ller caps
are on properly. Then pull the hood down and
close it rmly.
345

Engine Compartment Overview
When you open the hood on the 3800 V6 Supercharged engine (3800 V6 engine similar), here is what
you will see:
346

A. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 377.
B. Battery. SeeBattery on page 381.
C. Remote Positive (+) Terminal. SeeJump
Starting on page 382.
D. Underhood Fuse Block. SeeUnderhood Fuse
Block on page 462.
E. Engine Coolant Recovery Tank. SeeCooling
System on page 366.
F. Pressure Cap. SeePressure Cap on page 364.
G. Power Steering Fluid Reservoir (low in
engine compartment). SeePower Steering
Fluid on page 376.
H. Supercharger Oil Fill Location (If Equipped).
SeeSupercharger Oil on page 355.I. Electric Cooling Fan. SeeCooling System on
page 366.
J. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 350.
K. Engine Oil Fill Cap. See “When to Add Engine
Oil” underEngine Oil on page 350.
L. Engine Coolant Bleed Valve. See “How to Add
Coolant to the Radiator” underCooling
System on page 366.
M. Automatic Transaxle Fluid Dipstick. See
“Checking the Fluid Level” underAutomatic
Transaxle Fluid on page 357.
N. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 378.
O. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 355.
347

When you open the hood on the 5.3L V8 engine, here is what you will see:
348

A. Windshield Washer Fluid Reservoir. See
“Adding Washer Fluid” underWindshield
Washer Fluid on page 377.
B. Battery. SeeBattery on page 381.
C. Underhood Fuse Block. SeeUnderhood Fuse
Block on page 462.
D. Remote Positive (+) Terminal. SeeJump
Starting on page 382.
E. Pressure Cap. SeePressure Cap on page 364.
F. Power Steering Fluid Reservoir. SeePower
Steering Fluid on page 376.
G. Engine Oil Dipstick. See “Checking Engine Oil”
underEngine Oil on page 350.H. Engine Oil Fill Cap. See “When to Add Engine
Oil” underEngine Oil on page 350.
I. Automatic Transaxle Fluid Dipstick. See
“Checking the Fluid Level” underAutomatic
Transaxle Fluid on page 357.
J. Brake Master Cylinder Reservoir. See “Brake
Fluid” underBrakes on page 378.
K. Engine Air Cleaner/Filter. SeeEngine Air
Cleaner/Filter on page 355.
L. Engine Coolant Recovery Tank. SeeCooling
System on page 366.
349

Engine Oil
If this symbol, along with
the LOW OIL LEVEL
message appears on the
Driver Information
Center (DIC), it means
you need to check
the engine oil level
right away.
For more information, see LOW OIL LEVEL under
DIC Warnings and Messages on page 200. You
should check the engine oil level regularly;
this is an added reminder.
Checking Engine Oil
It is a good idea to check the 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.
The engine oil dipstick handle is a yellow loop.
SeeEngine Compartment Overview on page 346
for the location of the engine oil dipstick.
1. Turn off the engine and give the oil
several minutes to drain back into the oil pan.
If you do not do this, the oil dipstick might
not show the actual level.
2. 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.
350