2010 BUICK LUCERNE fuel pump

Fuel Gauge
United StatesCanada
The fuel gauge shows about how much fuel is in
the tank.
An arrow on the fuel gauge indicates the side of the
vehicle the fuel door is on. The gauge works only when the ignition is on. When the
indicator moves to the edge of the low fuel warning
band, the low fuel warning light comes on and a chime
sounds. The vehicle still has a little fuel left, but the
vehicles fuel tank should be filled soon.
Here are some things that some owners ask about.
None of these show a problem with the fuel gauge:
.At the service station, the gas pump shuts off
before the gauge reads full.
.It takes more (or less) fuel to fill up than the gauge
indicated. For example, the gauge may have
indicated half full, but it took more (or less) than
half the tank's capacity to fill it.
.The gauge moves up a little while turning a corner,
speeding up or making a hard stop.
.The gauge does not go back to empty when the
ignition is turned off.
4-46

Keep a record with all parts receipts and list the mileage
and the date of any service work performed. See
Maintenance Record on page 7‑13.
Adding Equipment to the Outside of
the Vehicle
Things added to the outside of the vehicle can affect the
airflow around it. This can cause wind noise and can
affect fuel economy and windshield washer
performance. Check with your dealer before adding
equipment to the outside of the vehicle.
Fuel
Use of the recommended fuel is an important part of
the proper maintenance of this vehicle. To help keep
the engine clean and maintain optimum vehicle
performance, we recommend the use of gasoline
advertised as TOP TIER Detergent Gasoline.
Look for the TOP TIER label on the fuel pump to ensure
gasoline meets enhanced detergency standards
developed by auto companies. A list of marketers
providing TOP TIER Detergent Gasoline can be found
at www.toptiergas.com.
The 8th digit of the Vehicle Identification Number (VIN)
shows the code letter or number that identifies the
vehicle's engine. The VIN is at the top left of the
instrument panel. SeeVehicle Identification Number
(VIN) on page 6‑109.
If the vehicle has the 3.9L V6 engine (VIN Code M),
you can use either unleaded gasoline or ethanol fuel
containing up to 85% ethanol (E85). See Fuel E85
(85% Ethanol)
on page 6‑8. In all other engines, use
only the unleaded gasoline described under Gasoline
Octane on page 6‑6.
6-5

Fuel E85 (85% Ethanol)
The 8th digit of the Vehicle Identification Number (VIN)
shows the code letter or number that identifies the
vehicle's engine. The VIN is at the top left of the
instrument panel. SeeVehicle Identification Number
(VIN) on page 6‑109.
If the vehicle has the 3.9L V6 engine (VIN Code M), you
can use either unleaded gasoline or ethanol fuel
containing up to 85% ethanol (E85). See Fuel
on
page 6‑5. In all other engines, use only the unleaded
gasoline described under Gasoline Octaneon
page 6‑6.
Only vehicles that have the 3.9L V6 engine
(VIN Code M) can use 85% ethanol fuel (E85). We
encourage the use of E85 in vehicles that are designed
to use it. The ethanol in E85 is a “renewable”fuel,
meaning it is made from renewable sources such as
corn and other crops.
Many service stations will not have an 85% ethanol
fuel (E85) pump available. The U.S. Department
of Energy has an alternative fuels website
(www.eere.energy.gov/afdc/infrastructure/locator.html)
that can help you find E85 fuel. Those stations that do
have E85 should have a label indicating ethanol
content. Do not use the fuel if the ethanol content is
greater than 85%. At a minimum, E85 should meet ASTM Specification
D 5798. By definition, this means that fuel labeled E85
will have an ethanol content between 70% and 85%.
Filling the fuel tank with fuel mixtures that do not meet
ASTM specifications can affect driveability and could
cause the malfunction indicator lamp to come on.
To ensure quick starts in the wintertime, the E85 fuel
must be formulated properly for your climate according
to ASTM specification D 5798. If you have trouble
starting on E85, it could be because the E85 fuel is not
properly formulated for your climate. If this happens,
switching to gasoline or adding gasoline to the fuel tank
can improve starting. For good starting and heater
efficiency below 0°C (32°F), the fuel mix in the fuel tank
should contain no more than 70% ethanol. It is best not
to alternate repeatedly between gasoline and E85.
If you do switch fuels, it is recommended that you
add as much fuel as possible
—do not add less than
11 L (three gallons) when refueling. You should drive
the vehicle immediately after refueling for at least
11 km (seven miles) to allow the vehicle to adapt to the
change in ethanol concentration.
6-8

Filling the Tank
{WARNING:
Fuel vapor burns violently and a fuel fire can
cause bad injuries. To help avoid injuries to you
and others, read and follow all the instructions on
the fuel pump island. Turn off the engine when
refueling. Do not smoke near fuel or when
refueling the vehicle. Do not use cellular phones.
Keep sparks, flames, and smoking materials away
from fuel. Do not leave the fuel pump unattended
when refueling the vehicle. This is against the law
in some places. Do not re-enter the vehicle while
pumping fuel. 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 side of the vehicle. If the
vehicle has E85 fuel capability, the fuel cap will be
yellow and state that E85 or gasoline can be used.
SeeFuel E85 (85% Ethanol) on page 6‑8.
To open the fuel door, push the rearward center edge in
and release and it will open.
6-10

To remove the fuel cap, turn it slowly to the left
(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, hang the tethered fuel cap from the
hook on the fuel door.
{WARNING:
Fuel can spray out on you if you open the fuel cap
too quickly. If you spill fuel and then something
ignites it, you could be badly burned. This spray
can happen if the tank is nearly full, and is more
likely in hot weather. Open the fuel cap slowly and
wait for any hiss noise to stop. Then unscrew the
cap all the way.
Be careful not to spill fuel. Do not top off or overfill the
tank and wait a few seconds after you have finished
pumping before removing the nozzle. Clean fuel from
painted surfaces as soon as possible. See Washing
Your Vehicle on page 6‑104. When replacing the fuel cap, turn it to the right
(clockwise) until it clicks. Make sure the cap is fully
installed. The diagnostic system can determine if the
fuel cap has been left off or improperly installed. This
would allow fuel to evaporate into the atmosphere. See
Malfunction Indicator Lamp on page 4‑41.
The TIGHTEN GAS CAP message displays on the
Driver Information Center (DIC) if the fuel cap is not
properly installed.{WARNING:
If a fire starts while you are refueling, do not
remove the nozzle. Shut off the flow of fuel by
shutting off the pump or by notifying the station
attendant. Leave the area immediately.
Notice: If you need a new fuel cap, be sure to get
the right type. Your dealer can get one for you.
If you get the wrong type, it may not fit properly.
This may cause the malfunction indicator lamp to
light and may damage the fuel tank and emissions
system. See Malfunction Indicator Lamp
on
page 4‑41.
6-11

Filling a Portable Fuel Container
{WARNING:
Never fill a portable fuel container while it is in the
vehicle. Static electricity discharge from the
container can ignite the fuel vapor. You can be
badly burned and the vehicle damaged if this
occurs. To help avoid injury to you and others:
.Dispense fuel only into approved containers.
.Do not fill 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 fill nozzle in contact with the inside
of the fill opening before operating the nozzle.
Contact should be maintained until the filling is
complete.
.Do not smoke while pumping fuel.
.Do not use a cellular phone while
pumping fuel.
Checking Things Under
the Hood
{WARNING:
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.
{WARNING:
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.
6-12

FusesUsage
1 Fuel Pump
2 Left Park Lamp
3 Not Used
4 Right Park Lamp
FusesUsage
5Engine Control Module (ECM)/
Transmission Control Module (TCM)
6 Memory Module
7 Not Used
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FusesUsage
47Electronic Leveling Control
Compressor (J-Case)
48 Blower (J-Case)
49 Not Used
Resistor Usage
50 Terminating Resistor
RelaysUsage
51 Not Used
52 Rear Defogger
53Electronic Leveling Control
Compressor
58 Park Lamps
59 Fuel Pump
60 Not Used
61 Not Used
Relays Usage
62 Unlock
63 Lock
64 Run
65 Daytime Running Lamps
66 Not Used
67 Trunk Release
68 Not Used
69 Not Used
70 Retained Accessory Power (RAP)
Circuit
Breakers Usage
54 Right Front Seat
55 Left Front Power Seat
56 Power Windows
57 Power Tilt Steering Wheel
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