2021 Buick Envision Fuses and Fuse Box Diagram User Guide
This Guide covers the 2021 Buick Envision fuses and fuse box diagram, helping you locate fuses, understand their functions, and troubleshoot electrical issues for safer, more effective car maintenance.
2023 Buick Envision Specs, Price, Features, Mileage (Brochure)
Video: 2021 Buick Envision Fuses
Headlamp Aiming
Front Headlamp Aiming
The headlamp aim has been preset and should need no further adjustment. If the vehicle is damaged in a crash, the headlamp aim may be affected. If an adjustment to the headlamps is necessary, see your dealer.
Bulb Replacement
For the proper type of replacement bulbs, or any bulb changing procedure not listed in this section, contact your dealer.
Caution
Do not replace incandescent bulbs with aftermarket LED replacement bulbs. This can cause damage to the vehicle’s electrical system.
LED Lighting
This vehicle has several LED lamps. For replacement of any LED lighting assembly, contact your dealer.
Electrical System
Electrical System Overload
The vehicle has fuses and circuit breakers to protect against an electrical system overload. When the electrical load current is too heavy, the circuit breaker opens and closes, protecting the circuit until the current load returns to normal or the problem is fixed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. Replace a bad fuse with a new one of the identical size and rating. If there is a problem on the road and a fuse needs to be replaced, the same amperage fuse can be borrowed. Choose some feature of the vehicle that is not needed to use and replace it as soon as possible.
Headlamp Wiring
An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off?
Windshield Wipers
If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart. Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage. Always clear ice and heavy snow from the windshield before using the windshield wipers. If the overload is caused by an electrical problem and not snow or ice, be sure to get it fixed.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of damage caused by electrical problems.
Danger
Fuses and circuit breakers are marked with their ampere rating. Do not exceed the specified amperage rating when replacing fuses and circuit breakers. Use of an oversized fuse or circuit breaker can result in a vehicle fire. You and others could be seriously injured or killed.
Warning
Installation or use of fuses that do not meet GM’s original fuse specifications is dangerous. The fuses could fail, and result in a fire. You or others could be injured or killed, and the vehicle could be damaged.
To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure toreplace a bad fuse with a new one of the identical size and rating. Fuses of the same amperage can be temporarily borrowed from another fuse location, if a fuse goes out. Replace the fuse as soon as possible. To identify and check fuses, circuit breakers, and relays.
Engine Compartment Fuse Block
To remove the fuse block cover, squeeze the clips on the cover and lift it straight up.
Caution
Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
The vehicle may not be equipped with all of the fuses, relays, and features shown.
Fuses Usage
- F02 Trailer stop/turn right
- F03 Electronic brake control module
- F05 Rear defog
- F06 –
- F07 Trailer stop/turn left
Fuses Usage
- F02 Trailer stop/turn right
- F03 Electronic brake control module
- F05 Rear defog
- F06 –
- F07 Trailer stop/turn left
- F12 Power tailgate
- F13 –
- F14 Canister vent solenoid
- F15 –
- F16 Front wiper
- F17 Passenger power seat
- F18 Motor window lifter left
- F19 Motor window lifter right
- F21 Exterior Lighting Module 1
- F22 Exterior lighting module 3
- F23 Exterior lighting module 6
- F24 –
- F26 Transmission control module direct current converter
- F27 Remote function actuator
- F28 –
- F29 Exterior lighting module 4
- F30 Memory seat module driver
- F32 Headlamp right
- F33 Front heated seat
2023 Buick Envision Specs, Price, Features, Mileage (Brochure)
| Fuses | Usage | Fuses | Usage | Fuses | Usage |
| F34 | Rear heated seat | F60 | – | F86 | – |
| F35 | Door panel/Seat position driver | F61 | – | F87 | Sunroof |
| and passenger switch | F62 | – | F88 | Aero shutter | |
| F36 | Fuel tank zone module | F63 | – | F89 | – |
| F39 | Handsfree closure module | F65 | Air conditioning control | F93 | Trailer park lamp |
| F40 | Headlamp left | F67 | – | F95 | – |
| F41 | – | F68 | – | F96 | – |
| F44 | Rear wiper | F69 | – | F99 | – |
| F48 | Blower motor | F70 | – | ||
| F49 | – | F72 | Starter pinion | Relays | Usage |
| F50 | – | F74 | – | K04 | Rear defog |
| F51 | – | F75 | Engine control module main | K25 | Front wiper control |
| F52 | – | F76 | Engine control module 2 | K37 | Front wiper speed |
| F54 | – | F78 | Horn | K64 | Starter motor |
| F55 | – | F79 | Washer pump | K66 | Powertrain |
| F56 | Starter motor | F81 | – | K71 | – |
| F57
F58 |
Driver power seat/Memory seat module Rear drive control module |
F82 F83 | Engine control module battery Engine control module/ Ignition coil |
K73 K80 K90 |
Air conditioning control Starter pinion – |
| F59 | – | F84 | Off engine 1/off engine 2 | K98 | – |
Instrument Panel Fuse Block
The instrument panel fuse block is on the driver side of the instrument panel, between the steering wheel and the door. To access the fuses, remove the panel, starting at the top. Once clips are disengaged, the tabs along the bottom of the door can be disengaged from the instrument panel to remove the door. To reinstall the door, place the bottom tabs into the slots, and rotate the door into position, engaging the clips. The vehicle may not be equipped with all of the fuses, relays, and features shown.
Fuses Amps Usage
- F1 40A Direct current to direct current converter 2
- F2 30A Body control module 4
- F3 – –
- F4 – –
- F5 25A Body Control Module 2
| F6 | 20A | Body control |
| module 3 | ||
| F7 | – | – |
| F8 | 20A | Exterior lighting module 5 |
| F9 | – | – |
| F10 | 5A |
Stee ring column lock |
| F11 | 10A | Body control module 1 |
| F12 | – | – |
| F13 | – | – |
| F14 | – | – |
| F15 | 15A | Auxiliary power outlet rear cargo |
| F16 | – | – |
| F17 | 20A | Exterior lighting module 7 |
| F18 | 10A | Uplevel tail lamp |
| F19 | 10A | Steering column lock assembly |
| F20 | 10A | Sensing diagnostic module/Automatic occupant sensing/ Data link connection/ Wireless charger |
| F21 | 5A | Central gateway module/Telematics control platform module |
| F22 | 10A | External object calculating module/Long range radar/Park assist/front camera module/ Side blind zone alert |
| F23 | 10A | Video processing module |
| F24 | – | – |
| F25 | 10A | AC power outlet/ Auxiliary USB |
| F26 | – | – |
| F27 | 30A | Amplifier |
| F28 | 60A | Jumper |
| F29 | 10A | Instrument cluster/Heads up display/Air quality ionizer module/ Center stack display/Heating ventilation air conditioning display |
| F30 | – | – |
| F31 | – | – |
| F32 | 10A | Run crank for misc. 3 humidity sensor/ Exterior lighting module/Electronic brake control module/Air quality sensor exterior/ Headlamp manual leveling left Right/ Inside rear view mirror/Interior particulate matter sensor/Seat fan control cushion and back driver
co-driver |
| F33 | – | – |
| F34 | 10A | Run crank for misc. 1 & 2 shifter interface board module/ Instrument panel cluster/ Transmission control module/ Sensing & diagnostic module/Headlamp manual leveling switch/Reflective light auxiliary display |
| F35 | 15A | Run crank for engine control module |
| F36 | 10A | Electric park brake switch/ Shifter interface board |
| F37 | 15A | Radio/Center stack module/
Auxiliary jack |
| F38 | – | – |
| F39 | 2A | Steering wheel clock spring |
| F40 | 20A | Exterior lighting module 2 |
| F41 | 7.5A | Heated steering wheel module |
| F42 | 20A | Direct current to alternate current inverter module |
| CB1 | – | – |
| CB2 | 15A | Auxiliary power outlet console |
Relays Usage
- K01 Retained accessory power accessory
- K02 Run/crank
- K03 –
- K04 –
- K05 –
Useful Link
View Full PDF: 2021 Buick Envision User Manual | Auto User Guide
2023 Buick Envision Specs, Price, Features, Mileage (Brochure)
2021 Buick Envision Instrument Cluster | How to use Dashboard