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: 2016
Engine Compartment Fuse Block
| Fuses | Usage |
| 1 | Transmission control module–battery |
| 2 | Engine control module battery |
| 3 | A/C clutch |
| 5 | Engine control module/Run/Crank |
| 6 | Wiper |
| 7 | Long range radar/ Front camera |
| 8 | Ignition coils–even (6–cylinder engine)/ Ignition coils–all (4–cylinder engine) |
| 9 | Ignition coils–odd (6–cylinder engine) |
| 10 | Engine control module–switched battery |
| 11 | 6–cylinder Engine: post catalytic converter/O2 sensor/ Heater/Mass air flow sensor/FlexFuel sensor/Secondary air induction solenoid |
| 12 | Starter |
| 13 | Crank for transmission control module/Fuel pump power/Chassis control module (eAssist) |
| 14 | Cabin heater coolant pump (eAssist)/ secondary air injector/Secondary air injector with pressure sensor |
| 15 | Motor generator unit coolant pump (eAssist) |
| 16 | Run/Crank for eAssist power inverter module |
| 17 | — |
| 18 | Sunshade module/ Vehicle air purification system/ Ventilated seats |
| 20 | Heated steering wheel (non eAssist) |
| 21 | Rear power windows |
| 22 | Sunroof |
| 23 | Variable effort steering (if equipped) or eAssist power inverter module |
| 24 | Front power windows |
| 25 | Rear heated seats |
| 26 | Antilock brake system pump |
| 27 | Electric parking brake |
| 28 | Rear window defogger |
| 29 | Heated seat/Left power lumbar |
| 30 | Heated Seat/Right power pack cooling fan (eAssist) |
| 31 | AWD/Electronic suspension control |
| 32 | Body control module 6 |
| 33 | Memory seat–front |
| 34 | Antilock brake system valves |
| 35 | Amplifier |
| 36 | Adaptive forward lighting (AFL) motors–battery |
| 37 | Right high-beam |
| 38 | Left high-beam |
| 41 | Brake vacuum pump |
| 42 | Cooling fan K2 |
| 43 | — |
| 44 | Transmission auxiliary oil pump (eAssist) |
| 45 | Cooling fan K1 |
| 46 | Cooling fan relay |
| 47 | 6–cylinder engine: Pre-catalytic converter O2 sensor heater/Canister purge solenoid. 4–cylinder engine: Pre and post catalytic converter O2 sensor Heaters/ Canister purge solenoid |
| 48 | Fog lamps |
| 49 | Fog lamps |
| 50 | Left HID headlamp |
| 51 | Horn |
| 52 | Cluster Run/Crank |
| 53 | Run/Crank for: rearview mirror/Rear vision camera/Air quality sensor/Aero shutter motor |
| 54 | Run/Crank for: HVAC/Headlamp switch |
| 55 | Outside rearview mirror/Universal remote system/Front window switches |
| 56 | Windshield washer |
| 59 | AIR pump |
| 60 | Heated mirror |
| 62 | Canister vent |
| 64 | Adaptive forward lighting (AFL) module–battery |
| 65 | — |
| 66 | AIR solenoid (eAssist) |
| 67 | Fuel pump power module/Chassis control module |
| 69 | Regulated voltage control sensor |
| 70 | Parking assist/Side blind zone |
| 71 | Passive entry/ Passive start |
| Relays | Usage |
| 1 | A/C Clutch |
| 2 | Starter |
| 4 | Wiper speed |
| 5 | Wiper control |
| 6 | Cabin heater coolant pump (eAssist)/ Secondary air injector/Secondary air injector with pressure senso |
| 7 | Engine control module |
| 9 | Cooling fan |
| 10 | Cooling fan |
| 11 | Transmission auxiliary oil pump (eAssist) |
| 13 | Cooling fan |
| 14 | Headlamp low-beam |
| 15 | Run/Crank |
| 16 | AIR pump |
| 17 | Rear window defogger |
Instrument Panel Fuse Block
The instrument panel fuse block is in the instrument panel, on the driver side of the vehicle.
| Fuses | Usage |
| 1 | APO 3 |
| 2 | Body control module 7 |
| 3 | Steering wheel controls backlight |
| 4 | Radio/Human machine interface/ Rear auxiliary audio jack/Front auxiliary audio video jack/ Touchpad/Remote media player/Bluray remote media player |
| 5 | OnStar/Universal hands–free phone |
| 6 | Power outlet 1 |
| 7 | Power outlet 2 |
| 8 | Body control module 1 |
| 9 | Body control module 4 |
| 10 | Body control module 8 |
| 11 | Front HVAC/Blower |
| 12 | Passenger seat |
| 13 | Driver seat |
| 14 | Diagnostic link connector |
| 15 | Airbag/Automatic occupant sensing |
| 16 | Trunk |
| 17 | HVAC Controller |
| 18 | Pre-fuse for fuses 4 and 5 |
| 19 | Center stack displays/Head-up display/Right steering wheel control switch/Rear seat infotainment display (eAssist)/ HVAC/Center stack displays |
| 20 | Rear seat entertainment display/Rear seat audio |
| 21 | Instrument cluster |
| 22 | Discrete logic ignition switch |
| 23 | Body control module 3 |
| 24 | Body control module 2 |
| 25 | Rear HVAC/Blower |
| 26 | AC DC inverter |
| Relays | Usage |
| R1 | Trunk relay |
| R2 | — |
| R3 | Power outlet relay |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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