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
| Mini Fuses | Usage |
| 1 | Sunroof |
| 2 | Outside Rearview Mirror Switch |
| 3 | Canister vent solenoid |
| 4 | Not used |
| 5 | Electronic brake control module valve |
| 6 | Intelligent battery sensor |
| 7 | Not used |
| 8 | Transmission control module battery |
| 9 | Not used |
| 10 | Fuel System Control Module R/C/ Headlamp Leveling |
| 11 | Rear wiper |
| 12 | Rear window defogger |
| 13 | Not used |
| 14 | Outside Rearview Mirror Heater |
| 15 | Fuel system control module battery |
| 16 | Heated seat module/ Memory module |
| 17 | Transmission Control Module R/C |
| 18 | Engine Control Module R/C |
| 19 | Fuel pump |
| 20 | Not used |
| 21 | Fan Relay (Auxiliary Fuse Block) |
| 22 | Not used |
| 23 | Ignition coil/ Injector |
| 24 | Washer pump |
| 25 | Not used |
| 26 | Canister Purge Solenoid/Water Valve Solenoid/ Oxygen Sensors – Pre and Post/Turbo Wastegate Solenoid (1.4L)/Turbo Bypass Solenoid (1.4L) |
| 27 | Auxiliary Heater Pump |
| 28 | Engine Control Module Powertrain Ignition 1 |
| 29 | Engine Control Module Powertrain Ignition 2 |
| 30 | Mass Air Flow Sensor |
| 31 | Left high-beam headlamp |
| 32 | Right high-beam headlamp |
| 33 | Engine control module battery |
| 34 | Horn |
| 35 | Air Conditioning Compressor Clutch |
| 36 | Front fog lamps |
| J-Case Fuses | Usage |
| 1 | Electronic brake control module pump |
| 2 | Front wipe |
| 3 | Blower Motor |
| 4 | IEC RC |
| 5 | Not Used |
| 6 | Not Used |
| 7 | Starter Solenoid (Automatic Transmission), Not Used (Manual Transmission |
| 8 | Cooling Fan Low/Mid |
| 9 | Cooling Fan High |
| 10 | EVP |
| 11 | Pinion Starter Solenoid (Automatic Transmission), Starter Solenoid (Manual Transmission) |
| U-Micro Relays | Usage |
| 2 | Fuel pump |
| 4 | Starter/Spare |
| HC-Micro Relays | Usage |
| 7 | Starter/Starter pinion |
| Mini Relays | Usage |
| 1 | Run/Crank |
| 3 | Cooling fan – mid |
| 5 | Powertrain relay |
| 8 | Cooling fan – low |
| HC-Mini Relays | Usage |
| 6 | Cooling fan – high |
Auxiliary Fuse Block
| Relays | Usage |
| RLY01 | Electric vacuum pump |
| RLY02 | Cooling fan control 1 |
| RLY03 | Cooling fan control 2 |
| RLY04 | N/A |
Instrument Panel Fuse Block
The instrument panel fuse block is on the underside of the driver side instrument panel.
| Fuses | Usage |
| F1 | Body control module 1 |
| F2 | Body control module 2 |
| F3 | Body control module 3 |
| F4 | Body control module 4 |
| F5 | Body control module 5 |
| F6 | Body control module 6 |
| F7 | Body control module 7 |
| F8 | Body control module 8 |
| F9 | Discrete logic ignition switch |
| F10 | Sensing Diagnostic Module Battery |
| F11 | Data link connector |
| F12 | Heater, Ventilation, and Air Conditioning MDL/ICS |
| F13 | Liftgate relay |
| F14 | UPA Module |
| F15 | LDW Module/Inside Rearview Mirror |
| F16 | Adaptive forward lighting module |
| F17 | Power WNDWSW DR |
| F18 | Rain Sensor |
| F19 | Body Control Module Regulated Voltage Contro |
| F20 | Steering Wheel Switch Backlighting |
| F21 | A/C Accessory Power Outlet/ PRND |
| F22 | Cigar Lighter/DC Accessory Power Outle |
| F23 | Spare |
| F24 | Spare |
| F25 | Spare |
| F26 | Automatic Occupant Sensing Display |
| F27 | IPC/PTC Control/ Clutch Switch |
| F28 | Headlamp Switch/ AFL/DC Converter |
| F29 | Spare |
| F30 | Transmission Control Module Battery |
| F31 | IPC Battery |
| F32 | Radio/Chime/ Aux Jack |
| F33 | Display/Faceplate |
| F34 | OnStar/UHP/DAB |
| Midi Fuses | Usage |
| M01 | PTC |
| S/B Fuses | Usage |
| S/B01 | Spare |
| S/B02 | Spare |
| S/B03 | Power Window Motor Front |
| S/B04 | Power Window Motor Rear |
| S/B05 | Logistic mode relay |
| S/B06 | Spare |
| S/B07 | Spare |
| S/B08 | Spare |
| Circuit Breaker | Usage |
| CB1 | Spare |
| Relay | Usage |
| RLY01 | Accessory/Retained accessory power |
| RLY02 | Liftgate |
| RLY03 | Spare |
| RLY04 | Spare |
| RLY05 | Logistic mode |
Rear Compartment Fuse Block
The rear compartment fuse block is behind a cover on the driver side of the rear compartment.
| Mini Fuses | Usage |
| F1 | Driver Seat Power Lumbar Switch |
| F2 | Passenger Seat Power Lumbar Switch |
| F3 | Amplifier |
| F4 | Trailer Socket (N/A) |
| F5 | All-Wheel Drive Module |
| F6 | Automatic Occupant Sensing Module |
| F7 | Spare/LPG Module Battery |
| F8 | Trailer Parking Lamps (N/A) |
| F9 | Spare |
| F10 | Spare/Side Blind Zone Alert Module |
| F11 | Trailer Module (N/A) |
| F12 | Nav Dock |
| F13 | Heated Steering Wheel |
| F14 | Trailer Socket (N/A) |
| F15 | Spare/EVP Switch |
| F16 | Water In Fuel Sensor |
| F17 | Inside Rearview Mirror/Rear Vision Camera |
| F18 | Spare/LPG Module Run/Crank |
| S/B Fuses | Usage |
| S/B01 | Driver Power Seat Switch/Memory Module |
| S/B02 | Passenger Power Seat Switch |
| S/B03 | Trailer Module (N/A) |
| S/B04 | A/C-D/C Inverter |
| S/B05 | Battery |
| S/B06 | Headlamp Washer |
| S/B07 | DC/DC Source 1 |
| S/B08 | DC/DC Source 1 |
| S/B09 | Spare |
| Relays | Usage |
| RLY01 | Ignition Relay |
| RLY02 | Run Relay |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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