Buick Regal (2018-2022) fuses and relays

This material discusses in detail the fuse diagrams of the Buick Regal (sixth generation): 2018, 2019, 2020, 2021, 2022 release.

Fuses #43, #44 and #37 in the interior fuse box are responsible for the cigarette lighter and 12V power sockets.

In the engine compartment


Located on the driver's side.


General view of the fuse box.

Diagram
No. Description
Relays
R4 Empty
R20 Rear window defogger
R25 Front wiper control
R31 Run/Crank
R37 Front wiper speed
R42 Empty
R64 Starter motor
R66 Powertrain
R71 Right LED high beam
R73 AC clutch
R80 Starter pinion
R90 Water change air coolant pump
R94 Empty
R98 Fuel heater
Fuses
1 Empty
2 Empty
3 ABS pump
5 Empty
6 Rear closure
7 Fog lamp
8 Memory control module
9 Heated windshield
10 Seat lumbar
11 DC DC converter 1
12 Rear window defogger
13 Heated mirrors
14 Empty
15 Empty
16 Front wipers
17 Passenger power seat
18 Sun shade
19 Driver power seat
21 Moonroof
22 Rear wiper
23 Auto headlamp leveling
24 Empty
26 Transmission control module (TCM)/Ignition
27 Instrument panel/Ignition
28 Empty
29 Rear vision camera/Ventilation
30 Malfunction indicator lamp/Shift solenoid
32 Canister vent/Video processing module
33 heated seats (front)
34 heated seats (rear)
35 All wheel drive damping control unit
36 Buick Regal Fuel Pump Fuse
38 Empty
39 Empty
40 Steering column lock
41 Empty
43 steering wheel heater
44 Headlamp leveling control unit
45 Empty
46 Engine control module (ECM) / Ignition
47 Empty
48 Cooling fan/DC DC converter 2
49 RDCM
50 Empty
51 Empty
52 Empty
53 Empty
54 Empty
55 Empty
56 Starter
57 Empty
58 Empty
59 Left LED lamps
60 Cooling fan
61 Empty
62 Empty
63 Empty
65 A/C HEV
67 Empty
68 Empty
69 Right LED lamp/Right high-beam headlamps
70 Left high-beam headlamps
72 Starter pinion
74 Empty
75 Engine control module (ECM)
76 Powertrain - off engine
77 Empty
78 Horn
79 Washer pump control unit
81 Transmission control module (TCM) / Engine control module (ECM)
82 Empty
83 Ignition coils
84 Coil
85 60A Shunt 
86 Empty
87 SAI fuel heater Unit
88 Aeroshutter Unit
89 Empty
91 Empty
92 TPIM motor generator/TPIM
93 Keyless entry control system
95 Water change air coolant pump
96 Fuel heater
97 Empty
99 Empty

In the passenger compartment


Fuse box located in the instrument panel, on the driver's side.


Access example.

Diagram
Relays
K1 Empty
K2 Accessory power relay
K3 Empty
K4 Empty
K5 Logistics Control Relay
Fuses
F1 Window (Left)
F2 Window (Right)
F3 Empty
F4 HVAC blower
F5 Battery #2
F6 Electric steering column
F7 Empty
F8 Battery #3
F9 Engine control module (ECM) / Battery
F10 BCM #2 On/Off
F11 Empty
F12 Empty
F13 Empty
F14 Empty
F15 Transmission control module (TCM) On/Off
F16 Audio Amp
F17 Empty
F18 Battery #7
F19 Empty
F20 Battery #1
F21 Battery #4
F22 Battery #6
F23 Electric steering column lock
F24 Airbag sensing diagnostic unir/Passenger sensing module
F25 Diagnostic link
F26 Empty
F27 AC/DC inverter
F28 Empty
F29 BCM #8
F30 Overhead console
F31 Steering wheel control unit
F32 Empty
F33 HVAC
F34 Center gateway control unit
F35 Integrated chassis control unit
F36 Charger
F37
  • Auxiliary 12V power socket
  • Buick Regal Cigarette lighter fuse
F38 OnStar system
F39 Monitor
F40 Object detection system
F41 BCM 1 On/Off
F42 Radio
F43 12V accessory power socket (Rear) / Cigar lighter
F44 12V accessory power socket (Front) / Cigarette lighter fuse
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