2003 BUICK LESABRE Owner's Manual

Removing the Rear Seat Cushion
Notice:The battery and main fuse blocks are
located under the rear seat cushion. The battery's
ground terminal and some relay wires are exposed.
To help avoid damage to the battery and wires,
be careful when removing or reinstalling the seat
cushion. Do not remove covers from covered parts.
Do not store anything under the seat, as objects
could touch exposed wires and cause a short.
To remove the rear seat cushion, do the following:
1. Pull up on the front of the cushion to release the
front hooks.
2. Pull the cushion up and out toward the front of the
vehicle.
To reinstall the rear seat cushion, do the following:{CAUTION:
A safety belt that isn't properly routed through
the seat cushion or is twisted won't provide
the protection needed in a crash. If the safety
belt hasn't been routed through the seat
cushion at all, it won't be there to work for the
next passenger. The person sitting in that
position could be badly injured. After
reinstalling the seat cushion, always check to
be sure that the safety belts are properly
routed and are not twisted.
5-89

1. Buckle the center passenger position safety belt,
then route the safety belts through the proper slots
in the seat cushion. Don't let the safety belts get
twisted.2. Slide the rear of the cushion up and under the
seatback so the rear-locating guides hook into
the wire loops on the back frame.
3. With the seat cushion lowered, push rearward and
then press down on the seat cushion until the
spring locks on both ends engage.
4. Check to make sure the safety belts are properly
routed and that no portion of any safety belt is
trapped under the seat. Also make sure the seat
cushion is secured.
Rear Underseat Fuse Block
The rear fuse block is
located beneath the rear
seat on the driver's
side. The rear seat cushion
must be removed to
access the fuse block. See
Removing the Rear Seat
Cushion on page 5-89.
5-90

Fuses Usage
1 Fuel Pump
2 HVAC Blower
3 Memory
4 Assembly Line Diagnostic Link
5 Not Used
6 Compact Disc (CD)
7 Driver's Door Module
8 Air Bag System (SIR)
9 Not Used
10 Right Parking Lamp
11 Vent Solenoid
12 Ignition 1
13 Left Parking LampFuses Usage
14 Dimmer
15 Satellite Digital Radio
16 Left Front Heated Seat
17 Not Used
18 Rear Door Module
19 Stoplamp
20 Park/Reverse
21 Audio
22 Retained Accessory Power (RAP)
23 Not Used
24 Not Used
25 Passenger Door Module
26 Body
27 Interior Lamps
28 Not Used
29 Ignition Switch
30 Instrument Panel
31 Right Front Heated Seat
32 Not Used
33 HVAC
34 Ignition 3 Rear
35 Anti-Lock Brake System (ABS)
36 Turn Signal/Hazard
37 HVAC Battery
38 Dimmer
5-91

Relays Usage
39 Fuel Pump
40 Parking Lamp
41 Ignition 1
42 Rear Fog Lamp
43 Not Used
44 Park
45 Reverse
46 Retained Accessory Power (RAP)
47 Fuel Tank Door Lock
48 Not Used
49 Ignition 3
50 Fuel Tank Door Release
51 Interior Lamps
52 Trunk Release
53 Front Courtesy Lamps
54 Not Used
55 Electronic Level Control (ELC)
Circuit
BreakersUsage
56 Power Seats
57 Power WindowsRelays Usage
58 Cigar
59 Rear Defogger
Fuses Usage
60 Not Used
61 Rear Defog
62 Not Used
63 Audio Ampli®er
64 Electronic Level Control (ELC)
65 Cigar
66 Not Used
67 Not Used
68 Not Used
69 Spare
70 Spare
71 Spare
72 Spare
73 Spare
74 Spare
75 Fuse Puller
5-92

Capacities and Speci®cations
The following approximate capacities are given in English and metric conversions. Please refer toPart D:
Recommended Fluids and Lubricants on page 6-23for more information.
Capacities
ApplicationCapacities
English Metric
Wheel Nut Torque 100 lb-ft 140Y
Automatic Transaxle 7.4 quarts 7.0 L
Engine Cooling System 10.0 quarts 9.5 L
Engine Oil with Filter 4.5 quarts 4.3 L
Fuel Tank 18.5 gallons 70.0 L
Air Conditioning Refrigerant R134a 2.2 lbs 1.0 kg
All capacities are approximate. When adding, be sure to ®ll to the appropriate level, as recommended in this
manual. Recheck ¯uid level after ®lling.
Engine Speci®cations
Engine VIN Code Transmission Spark Plug Gap Firing Order
3.8L V6 K Automatic0.060 inch
(1.52 mm)1-6-5-4-3-2
5-93

Normal Maintenance Replacement Parts
Normal Maintenance Replacement Parts
Part Number
Engine Air Cleaner/Filter A1096C*
Passenger Compartment Air Filter GM Part # 25654414
Engine Oil FilterPF-47*
Fuel FilterGF-627*
Transaxle FilterGM Part # 24206433
PCV ValveGM Part # 17113515
Spark Plugs41±101*
Windshield Wiper Blades
Length
Type22 inches (56.0 cm)
Shepherd's Hook
*ACDelco
žpart number
5-94

Maintenance Schedule......................................6-2
Introduction...................................................6-2
Your Vehicle and the Environment....................6-2
Maintenance Requirements..............................6-2
How This Section is Organized.........................6-3
Part A: Scheduled Maintenance Services...........6-4
Using Your Maintenance Schedule....................6-4
Selecting the Right Schedule...........................6-5
Short Trip/City Scheduled Maintenance..............6-6
Long Trip/Highway Scheduled Maintenance......6-13
Part B: Owner Checks and Services................6-17
At Each Fuel Fill..........................................6-17
At Least Once a Month.................................6-17At Least Twice a Year...................................6-18
At Least Once a Year...................................6-18
Part C: Periodic MaintenanceInspections.........6-21
Steering, Suspension and Front Drive Axle
Boot and Seal Inspection............................6-21
Exhaust System Inspection............................6-21
Fuel System Inspection..................................6-22
Engine Cooling System Inspection...................6-22
Throttle System Inspection.............................6-22
Brake System Inspection................................6-22
Part D: Recommended Fluids and
Lubricants................................................6-23
Part E: Maintenance Record...........................6-24
Section 6 Maintenance Schedule
6-1

Maintenance Schedule
Introduction
Important: Keep engine oil at the proper level and
change as recommended.
Have you purchased the GM Protection Plan? The Plan
supplements your new vehicle warranties. See your
Warranty and Owner Assistance booklet or your dealer
for details.
Your Vehicle and the Environment
Proper vehicle maintenance not only helps to keep your
vehicle in good working condition, but also helps the
environment. Improper vehicle maintenance can
even affect the quality of the air we breathe. Improper
¯uid levels or the wrong tire in¯ation can increase
the level of emissions from your vehicle. To help protect
our environment, and to keep your vehicle in good
condition, be sure to maintain your vehicle properly.
Maintenance Requirements
Maintenance intervals, checks, inspections and
recommended ¯uids and lubricants as prescribed in this
manual are necessary to keep your vehicle in good
working condition. Any damage caused by failure
to follow scheduled maintenance may not be covered by
warranty.
6-2