ECU BUICK LUCERNE 2011 Service Manual

Black plate (85,1)Buick Lucerne Owner Manual - 2011
Channel Unavail:This previously assigned channel
is no longer assigned. Tune to another station. If this
station was one of the presets, choose another station
for that preset button.
No Artist Info: No artist information is available at this
time on this channel. The system is working properly.
No Title Info: No song title information is available at
this time on this channel. The system is working
properly.
No CAT Info: No category information is available at
this time on this channel. The system is working
properly.
No Information: No text or informational messages are
available at this time on this channel. The system is
working properly.
No Subscription Please Renew: XM subscription
needs to be reactivated. Contact XM at
www.xmradio.com or call 1-800-929-2100 in the U.S.
and www.xmradio.ca or call 1-877-438-9677 in Canada.
CAT Not Found: There are no channels available for
the selected category. The system is working properly.
XM Theftlocked: The XM receiver in the vehicle could
have previously been in another vehicle. For security
purposes, XM receivers cannot be swapped between
vehicles. If this message is received after having the
vehicle serviced, check with your dealer. XM Radio ID:
If tuned to channel 0, this message
alternates with the XM™ Radio 8 digit radio ID label.
This label is needed to activate the service.
Unknown: If this message is received when tuned to
channel 0, there could be a receiver fault. Consult with
your dealer.
Check Antenna: If this message does not clear within
a short period of time, the receiver or antenna could
have a fault. Consult with your dealer.
Check XM Receivr: If this message does not clear
within a short period of time, the receiver could have a
fault. Consult with your dealer.
XM Not Available: If this message does not clear
within a short period of time, the receiver could have a
fault. Consult with your dealer.
Navigation/Radio System
For vehicles with a navigation radio system, see the
separate Navigation System manual.
4-85

Black plate (22,1)Buick Lucerne Owner Manual - 2011
Never exceed the GVWR for your vehicle or the
Gross Axle Weight Rating (GAWR) for either the
front or rear axle.
If there is a heavy load, it should be spread out.
{WARNING:
Do not load the vehicle any heavier than
the Gross Vehicle Weight Rating (GVWR),
or either the maximum front or rear Gross
Axle Weight Rating (GAWR). This can cause
systems to break and change the way the
vehicle handles. This could cause loss of
control and a crash. Overloading can also
shorten the life of the vehicle.
Notice:Overloading the vehicle may cause
damage. Repairs would not be covered by the
vehicle warranty. Do not overload the vehicle.
If things like suitcases, tools, packages,
or anything else are put inside the vehicle, they
will go as fast as the vehicle goes. If you have to
stop or turn quickly, or if there is a crash, they will
keep going.
{WARNING:
Things inside the vehicle can strike and
injure people in a sudden stop or turn, or in a
crash.
.Put things in the cargo area of the
vehicle. In the cargo area, put them
as far forward as possible. Try to spread
the weight evenly.
.Never stack heavier things, like
suitcases, inside the vehicle so that
some of them are above the tops of the
seats.
.Do not leave an unsecured child restraint
in the vehicle.
.Secure loose items in the vehicle.
.Do not leave a seat folded down unless
needed.
5-22

Black plate (25,1)Buick Lucerne Owner Manual - 2011
5. Remove the key from the ignition.
6. Secure the vehicle to the dolly.
7. Release the parking brake.
Towing a Trailer
{WARNING:
The driver can lose control when pulling a trailer if
the correct equipment is not used or the vehicle is
not driven properly. For example, if the trailer is
too heavy, the brakes may not work well—or
even at all. The driver and passengers could
be seriously injured. The vehicle may also be
damaged; the resulting repairs would not be
covered by the vehicle warranty. Pull a trailer only
if all the steps in this section have been followed.
Ask your dealer for advice and information about
towing a trailer with the vehicle.
Notice: Pulling a trailer improperly can damage the
vehicle and result in costly repairs not covered by
the vehicle warranty. To pull a trailer correctly,
follow the advice in this section and see your dealer
for important information about towing a trailer with
the vehicle. The vehicle can tow a trailer if it is equipped with
the proper trailer towing equipment. To identify the
trailering capacity of the vehicle, read the information
in
“Weight of the Trailer” that appears later in this
section. Trailering is different than just driving the
vehicle by itself. Trailering means changes in handling,
acceleration, braking, durability and fuel economy.
Successful, safe trailering takes correct equipment,
and it has to be used properly.
The following information has many time-tested,
important trailering tips and safety rules. Many of
these are important for the safety of the driver and
the passengers. So please read this section carefully
before pulling a trailer.
Load-pulling components such as the engine,
transmission, axles, wheel assemblies and tires are
forced to work harder against the drag of the added
weight. The engine is required to operate at relatively
higher speeds and under greater loads, generating
extra heat. The trailer also adds considerably to wind
resistance, increasing the pulling requirements.
5-25

Black plate (29,1)Buick Lucerne Owner Manual - 2011
Driving with a Trailer
Towing a trailer requires a certain amount of
experience. Get to know the rig before setting out for
the open road. Get acquainted with the feel of handling
and braking with the added weight of the trailer. And
always keep in mind that the vehicle you are driving is
now longer and not as responsive as the vehicle is by
itself.
Before starting, check all trailer hitch parts and
attachments, safety chains, electrical connectors,
lamps, tires and mirror adjustments. If the trailer has
electric brakes, start the vehicle and trailer moving and
then apply the trailer brake controller by hand to be sure
the brakes are working. This checks the electrical
connection at the same time.
During the trip, check occasionally to be sure that the
load is secure, and that the lamps and any trailer
brakes are still working.
Following Distance
Stay at least twice as far behind the vehicle ahead as
you would when driving the vehicle without a trailer.
This can help to avoid situations that require heavy
braking and sudden turns.
Passing
More passing distance is needed when towing a trailer.
Because the rig is longer, it is necessary to go much
farther beyond the passed vehicle before returning to
the lane.
Backing Up
Hold the bottom of the steering wheel with one hand.
Then, to move the trailer to the left, move that hand to
the left. To move the trailer to the right, move your hand
to the right. Always back up slowly and, if possible,
have someone guide you.
Making Turns
Notice:Making very sharp turns while trailering
could cause the trailer to come in contact with the
vehicle. The vehicle could be damaged. Avoid
making very sharp turns while trailering.
When turning with a trailer, make wider turns than
normal. Do this so the trailer will not strike soft
shoulders, curbs, road signs, trees or other objects.
Avoid jerky or sudden maneuvers. Signal well in
advance.
5-29

Black plate (31,1)Buick Lucerne Owner Manual - 2011
Leaving After Parking on a Hill
1. Apply and hold the brake pedal while you:
.start the engine,
.shift into a gear, and
.release the parking brake.
2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer Towing
The vehicle needs service more often when pulling a
trailer. See Scheduled Maintenanceon page 7‑3for
more information. Things that are especially important
in trailer operation are automatic transmission fluid,
engine oil, belts, cooling system and brake system. It is
a good idea to inspect these before and during the trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Engine Cooling When Trailer Towing
The cooling system may temporarily overheat during
severe operating conditions. See Engine Overheating
on page 6‑35.
Changing a Tire When Trailer Towing
If the vehicle gets a flat tire while towing a trailer, be
sure to secure the trailer and disconnect it from the
vehicle before changing the tire.
5-31

Black plate (31,1)Buick Lucerne Owner Manual - 2011
You can remove the
coolant surge tank
pressure cap when the
cooling system, including
the coolant surge tank
pressure cap and upper
radiator hose, is no
longer hot.
1. Turn the pressure cap slowly counterclockwise. If you hear a hiss, wait for that to stop. A hiss
means there is still some pressure left.
2. Then keep turning the cap and remove it.
3. Fill the coolant surge tank with the proper
mixture to the FULL
COLD mark on the
side of the coolant
surge tank. 4. With the coolant surge tank cap off, start the
engine and let it run until you can feel the upper
radiator hose getting hot. Watch out for the engine
cooling fans.
By this time, the coolant level inside the coolant
surge tank may be lower. If the level is lower, add
more of the proper mixture to the coolant surge
tank until the level reaches the FULL COLD mark
on the side of the coolant surge tank.
5. Then replace the cap. Be sure the cap is hand‐tight and fully seated.
If coolant is needed, add the proper DEX-COOL
®
coolant mixture at the coolant recovery tank.
Notice: If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
Engine Coolant (3.9L Engine)
The cooling system in the vehicle is filled with
DEX-COOL®engine coolant. This coolant is designed
to remain in the vehicle for five years or 150,000 miles
(240 000 km), whichever occurs first.
The following explains the cooling system and how
to check and add coolant when it is low. If there is
a problem with engine overheating, see Engine
Overheating on page 6‑35.
6-31

Black plate (35,1)Buick Lucerne Owner Manual - 2011
5. Install the coolant recovery tank cap and thepressure cap. After a day or two of driving, when
the engine is cold, check the coolant level in the
recovery tank. If it is low, refill it to the COLD
FILL line.
If the coolant in the recovery tank is constantly low, you
should have a dealer service department inspect the
vehicle for leaks.
Notice: If the pressure cap is not tightly installed,
coolant loss and possible engine damage may
occur. Be sure the cap is properly and tightly
secured.
Engine Overheating
The vehicle has several indicators to warn of engine
overheating.
You will find a warning light about a hot engine as
well as an engine coolant temperature gauge on the
instrument panel cluster. You may decide not to lift the hood when this warning
appears, but instead get service help right away. See
Roadside Assistance Program on page 8‑7.
If you do decide to lift the hood , make sure the vehicle
is parked on a level surface.
Then check to see if the engine cooling fans are
running. If the engine is overheating, both fans should
be running. If they are not, do not continue to run the
engine and have the vehicle serviced.
Notice:
Engine damage from running the engine
without coolant is not covered by the warranty.
Notice: If the engine catches fire while driving
with no coolant, the vehicle can be badly damaged.
The costly repairs would not be covered by the
vehicle warranty. See Overheated Engine Protection
Operating Mode
on page 6‑37for information on
driving to a safe place in an emergency.
6-35

Black plate (43,1)Buick Lucerne Owner Manual - 2011
{WARNING:
A battery that is not properly vented can let
sulfuric acid fumes into the area under the rear
seat cushion. These fumes can damage the rear
seat safety belt systems. You might not be able to
see this damage and the safety belts might not
provide the protection needed in a crash. If a
replacement battery is ever needed, it must be
vented in the same manner as the original battery.
Always make sure that the vent hose is properly
reattached before reinstalling the seat cushion.
To be sure the vent hose (A) is properly attached, the
vent hose connectors (B) must be securely reattached
to the vent outlets (C) on each side of the battery and
the vent assembly grommet (D) must be secured to the
floor pan (E).
6-43

Black plate (53,1)Buick Lucerne Owner Manual - 2011
5. Remove the three hex nuts holding the taillampassembly in place.
6. Pull the taillamp assembly straight out.
7. Turn the bulb socket counterclockwise and pull it straight out to remove it. 8. Pull the old bulb straight out of the socket.
9. Push the new bulb straight in until it clicks.
10. Push the bulb socket in and turn it clockwise to secure it in the taillamp assembly.
11. Push the taillamp assembly straight in to its original location.
When reinstalling the taillamp assembly, make
sure the plastic pin on the taillamp assembly lines
up and is inserted correctly into the opening of the
vehicle.
12. Reinstall the three hex nuts holding the taillamp assembly in place.
13. Put the trunk trim back into place.
14. Reinstall the plastic wing nuts that retain the trunk trim.
15. Put the convenience net back in its original location.
6-53

Black plate (55,1)Buick Lucerne Owner Manual - 2011
7. Push the bulb socket in and turn it clockwise tosecure it.
8. Put the trunk trim and three fasteners back into place.
License Plate Lamp
To replace one of these bulbs:
1. Remove the license plate.
2. Reach up through the opening above the license plate to access the two license plate lamps.
3. Turn the socket counterclockwise to remove.
4. Grasp the bulb in the socket and pull straight out.
5. Push the bulb straight into the socket until it clicks to secure it.
6. Push the socket in and turn it clockwise to secure it.
7. Reinstall the license plate in its original location.
Replacement Bulbs
Exterior Lamps Bulb Number
Back-up Lamp 921LL
Sidemarker, License Plate Lamp,
and Auxiliary Taillamp 194LL
Stoplamp, Taillamp, and Turn
Signal Lamp 3057K
For replacement bulbs not listed here, contact your
dealer.
Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected for wear
or cracking. See
Scheduled Maintenance on page 7‑3.
It is a good idea to clean or replace the wiper blade
assembly on a regular basis or when worn. For
proper windshield wiper blade length and type, see
Maintenance Replacement Parts on page 7‑10.
6-55