Chevrolet Impala Fuse Box: What Each Fuse Does
From the 2020 Chevrolet Impala owner's manual. 2 fuse boxes listed.
Engine Compartment Fuse Block
| Fuse | Circuit |
|---|---|
| 1 | Transmission control module battery |
| 2 | Engine control module battery / A/C Clutch |
| 3 | A/C clutch |
| 4 | Engine control module battery |
| 5 | Engine control module/Ignition |
| 6 | Front wiper |
| 7 | Engine control module ignition |
| 8 | Ignition coils – even |
| 9 | Ignition coils – odd |
| 10 | Engine control module |
| 11 | Mass air flow sensor/ Intake air temperature/Humidity/ Temperature intake air pressure/Post catalytic converter O2 sensors |
| 12 | Starter/Starter pinion |
| 13 | Transmission control module/Chassis control module/ Ignition |
| 14 | Cabin coolant pump |
| 17 | Ventilated front seats/ Heated steering wheel |
| 18 | Battery disconnect unit |
| 19 | Aeroshutter |
| 20 | Transmission auxiliary pump |
| 21 | Rear power window |
| 22 | Sunroof |
| 23 | Adaptive cruise control |
| 24 | Front power window |
| 25 | Retained accessory power |
| 26 | ABS pump |
| 27 | Electric parking brake |
| 28 | Rear defogger |
| 29 | Passive entry/Passive start |
| 30 | Canister vent solenoid |
| 31 | Heated seat – driver |
| 32 | LED Backlight Dimming Control/Left headlamp low-beam/ Right rear stop/turn lamp/RAP relay/LED ambient lighting/ Dome-reading lamps |
| 33 | Heated seat – passenger |
| 34 | ABS valve |
| 35 | Amplifier |
| 37 | Right high-beam headlamp |
| 38 | Left high-beam headlamp |
| 41 | Vacuum pump |
| 42 | Cooling fan high speed |
| 44 | Starter control |
| 45 | Cooling fan low speed |
| 46 | Cooling fan control |
| 47 | Pre catalytic converter O2 sensors/Canister purge solenoid |
| 49 | Right HID headlamp |
| 50 | Left HID headlamp |
| 51 | Horn |
| 52 | Display/Ignition |
| 53 | Inside rearview mirror/ Rear vision camera |
| 54 | Instrument panel/ Ignition |
| 55 | Exterior rearview mirror |
| 56 | Front washer |
| 60 | Heated mirror |
| 62 | Obstacle detection |
| 64 | Rain sensor/Rear seat audio |
| 66 | Trunk release |
| 67 | Chassis control module |
| 69 | Battery voltage sensor |
| 71 | Memory seat |
| Relay 1 | A/C clutch |
| Relay 2 | Starter pinion |
| Relay 4 | Front wiper speed |
| Relay 5 | Front wiper control |
| Relay 6 | Cabin Coolant pump/ Air solenoid |
| Relay 7 | Powertrain |
| Relay 8 | Transmission auxiliary pump |
| Relay 9 | Cooling fan high speed |
| Relay 10 | Cooling fan low speed |
| Relay 11 | Starter |
| Relay 13 | Cooling fan control |
| Relay 14 | Low-beam HID headlamp |
| Relay 15 | Run/Crank |
| Relay 17 | Rear window defogger |
Instrument Panel Fuse Block
Location: In the instrument panel, on the driver side of the vehicle.
| Fuse | Circuit |
|---|---|
| 9 | Trunk lamp/Right low-beam headlamp/ DRL/Right front turn lamp/Right rear parking lamp/ Stoplamp |
| 10 | Door unlock |
| 11 | Front HVAC blower |
| 12 | Passenger power seat |
| 13 | Driver power seat |
| 14 | Diagnostic link connector |
| 15 | Airbag/SDM |
| 16 | Right rear heated seat |
| 17 | HVAC Controller |
| 18 | Logistics |
| 19 | Left rear heated seat |
| 20 | Ignition switch |
| 21 | Telematics |
| 22 | Steering wheel controls |
| 23 | Left low-beam headlamp/DRL/Left front turnlamp/Left rear parking lamp/ Stoplamp/Safety lock relay |
| 24 | Theft deterrent LED/ Key capture solenoid/Run relay |
| 25 | Tilt/Telescoping steering column |
| 26 | 110VAC |
| K1 | – |
| K2 | Logistic |
| K3 | Power outlet relay |
Source: owner's manual, PDF page 232.
Listings are copied as text from the manual's fuse tables (AI-assisted; every circuit name was matched against the cited pages 2026-10-18). Fuse layouts can differ by trim and year; check the label on the fuse box cover before replacing a fuse, and always use the same amp rating.
Confirm with your own manual, dipstick or door-jamb label.
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