Jonathan Yarden Jan 30, 2021 · 5 min. read
In this article you will find a description of fuses and relays Buick,
with photos of block diagrams and their locations.
Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.
Year of production: 2003, 2004, 2005, 2006
Engine Compartment Fuse Block
The fuse block is located under the hood in the engine compartment on the driverās side of the vehicle.
Engine L6
Fuses | Usage |
1 | Electrically-Controlled Air Suspension |
2 | Passengerās Side High-Beam Headlamp |
3 | Passengerās Side Low-Beam Headlamp |
4 | Back-Up Trailer Lamps |
5 | Driverās Side High-Beam Headlamp |
6 | Driverās Side Low-Beam Headlamp |
7 | Windshield Wiper |
8 | Automatic Transfer Case |
9 | Windshield Washer |
10 | Powertrain Control Module B |
11 | Fog Lamps |
12 | Stoplamp |
13 | Cigarette Lighter |
14 | Not Used |
15 | Electric Adjustable Pedal |
16 | Truck Body Controller, Ignition 1 |
17 | Crank |
18 | Airbag |
19 | Trailer Electric Brake |
20 | Cooling Fan |
21 | Horn |
22 | Ignition E |
23 | Electronic Throttle Control |
24 | Instrument Panel Cluster, Driver Information Center |
25 | Automatic Shift Lock Control System |
26 | Engine 1 |
27 | Back-up |
28 | Powertrain Control Module 1 |
29 | Oxygen Sensor |
30 | Air Conditioning |
31 | Truck Body Controller 1 |
32 | Trailer |
33 | Anti-lock Brakes (ABS) |
34 | Ignition A |
35 | Blower Motor |
36 | Ignition B |
50 | Passengerās Side Trailer Turn |
51 | Driverās Side Trailer Turn |
52 | Hazard Flashers |
53 | Headlamp Driver Module |
54 | Air Injection Reactor (AIR) Solenoid |
56 | Air Injection Reactor (AIR) Pump |
Ā
Relays | Usage |
37 | Blank or Headlamp Washer |
38 | Rear Window Wiper/Washer |
39 | Fog Lamps |
40 | Horn |
41 | Fuel Pump |
42 | Windshield Washer |
43 | High-Beam Headlamp |
44 | Air Conditioning |
45 | Cooling Fan |
46 | Headlamp Driver Module |
47 | Starter |
49 | Electric Adjustable Pedal |
55 | Air Injection Reactor (AIR) Solenoid |
57 | Powertrain |
58 | Vehicle Stability Enhancement System (StabiliTrakĀ®) |
Ā
Miscellaneous | Usage |
48 | Instrument Panel Battery |
Engine V8
Fuses | Usage |
1 | Electrically-Controlled Air Suspension |
2 | Passengerās Side High-Beam Headlamp |
3 | Passengerās Side Low-Beam Headlamp |
4 | Back-Up Trailer Lamps |
5 | Driverās Side High-Beam Headlamp |
6 | Driverās Side Low-Beam Headlamp |
7 | Rear Window Washer |
8 | Automatic Transfer Case |
9 | Windshield Washer |
10 | Powertrain Control Module B |
11 | Fog Lamps |
12 | Stoplamp |
13 | Cigarette Lighter |
14 | Ignition Coils |
15 | Canister Vent |
16 | Truck Body Controller, Ignition 1 |
17 | Crank |
18 | Airbag |
19 | Trailer Electric Brake |
20 | Cooling Fan |
21 | Horn |
22 | Ignition E |
23 | Electronic Throttle Control |
24 | Instrument Panel Cluster, Driver Information Center |
25 | Automatic Shift Lock Control System |
26 | Engine 1 |
27 | Backup |
28 | Powertrain Control Module 1 |
29 | Powertrain |
30 | Air Conditioning |
31 | Injector Bank A |
32 | Trailer |
33 | Anti-lock Brakes (ABS) |
34 | Ignition A |
35 | Blower Motor |
36 | Ignition B |
50 | Passengerās Side Trailer Turn |
51 | Driverās Side Trailer Turn |
52 | Hazard Flashers |
53 | Transmission |
54 | Oxygen Sensor Bank B |
55 | Oxygen Sensor Bank A |
56 | Injector Bank B |
57 | Headlamp Driver Module |
58 | Body Controller 1 |
59 | Electric Adjustable Pedal |
61 | Vehicle Stability Enhancement System (StabiliTrakĀ®) |
Ā
Relays | Usage |
37 | Headlamp Washer |
38 | Rear Window Wiper/Washer |
39 | Fog Lamps |
40 | Horn |
41 | Fuel Pump |
42 | Windshield Wipers/Washer |
43 | High-Beam Headlamp |
44 | Air Conditioning |
45 | Cooling Fan |
46 | Headlamp Driver Module |
47 | Starter |
49 | Electric Adjustable Pedal |
60 | Powertrain |
Miscellaneous | Usage |
48 | Instrument Panel Battery |
Rear Underseat Fuse Block
Fuses | Usage |
01 | Passenger Door Control Module |
02 | Driver Door Control Module |
03 | Liftgate Module 2 |
04 | Truck Body Controller 3 |
05 | Rear Fog Lamps |
06 | Blank |
07 | Truck Body Controller 2 |
08 | Power Seats |
09 | Rear Wiper |
10 | Driver Door Module |
11 | Amplifier |
12 | Passenger Door Module |
13 | Rear Climate Controls |
14 | Left Rear Parking Lamps |
15 | Blank |
16 | Vehicle Center High-Mounted Stoplamp (CHMSL) |
17 | Right Rear Parking Lamps |
18 | Locks |
19 | Liftgate Module/Driver Seat Module |
20 | Blank |
21 | Lock |
23 | Blank |
24 | Unlock |
25 | Blank |
26 | Blank |
27 | OnStarĀ® Overhead Battery, OnStarĀ® System |
28 | Sunroof |
29 | Rainsenseā¢ Wipers |
30 | Parking Lamps |
31 | Truck Body Controller Accessory |
32 | Truck Body Controller 5 |
33 | Front Wipers |
34 | Vehicle Stop |
35 | Transmission Control Module |
36 | Heat Ventilation Air Conditioning B |
37 | Front Parking Lamps |
38 | Left Turn Signal |
39 | Heat Ventilation Air Conditioning I |
40 | Truck Body Controller 4 |
41 | Radio |
42 | Trailer Park |
43 | Right Turn Signal |
44 | Heat Ventilation Air Conditioning |
45 | Rear Fog Lamps |
46 | Auxiliary Power 1 |
47 | Ignition 0 |
48 | Four-Wheel Drive |
49 | Blank |
50 | Truck Body Controller Ignition |
51 | Brakes |
52 | Truck Body Controller Run |
WARNING:Ā Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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