Most of the electrical circuits in this American SUV are protected by fuses. High-current components are connected via relays. Most circuit protection devices are located in fuse blocks situated in the passenger compartment, cargo area, and engine compartment.
The information provided in these diagrams applies to 4th-generation Chevrolet Tahoe (K2UC) models from 2013 through 2019.
Engine Compartment
The fuse block is located on the driver side behind a protective cover.
General view.
| Diagram | |
|---|---|
|
|
| No. | Description |
| 1 | Power assist steps |
| 2 | Anti-lock brake system (ABS) pump |
| 3 | Instrument Panel Fuse Block – Left |
| 4 | Passenger seat belt pretensioner |
| 5 | Air suspension compressor |
| 6 | Four-wheel drive (4WD) control module |
| 10 | Electronic parking brake (EPB) |
| 13 | Instrument Panel Fuse Block – Left |
| 14 | Rear Instrument Panel Fuse Block |
| 17 | Driver seat belt pretensioner |
| 21 | Automatic leveling control exhaust solenoid valve |
| 23 | Suspension control module / Fuel pump control module |
| 24 | Magnetic Ride Control (real-time damping) |
| 25 | Fuel pump control module |
| 26 | Spare / BCM regulated voltage control |
| 28 | Accessory fuse 2 |
| 29 | Auxiliary equipment / Police option 2 |
| 30 | Windshield wipers |
| 34 | Reverse lamps |
| 35 | ABS valves |
| 36 | Trailer brake control module |
| 37 | Auxiliary equipment / Police option 3 |
| 39 | Trailer stop/turn lamp – Right |
| 40 | Trailer stop/turn lamp – Left |
| 41 | Trailer parking lamps |
| 42 | Trailer side marker lamps – Right |
| 43 | Trailer side marker lamps – Left |
| 44 | Accessory fuse 3 |
| 45 | Automatic leveling system – Ignition feed |
| 47 | Accessory fuse 4 |
| 48 | Accessory relay 4 |
| 49 | Trailer reverse lamps |
| 51 | Parking lamp relay |
| 60 | A/C compressor clutch |
| 63 | Accessory fuse 1 |
| 67 | 12 V trailer battery feed |
| 69 | Auxiliary option remote control 3 and 4 |
| 70 | Option 3 & 4 relay voltage reference |
| 72 | Accessory relay 1 |
| 74 | Engine Control Module (ECM) ignition feed |
| 75 | Spare ignition feed |
| 76 | Transmission Control Module (TCM) ignition feed |
| 77 | Auxiliary option remote control 1 and 2 |
| 78 | Option 1 & 2 relay voltage reference |
| 83 | Spare fuse |
| 84 | Ignition relay |
| 87 | Engine control sensors (MAF, MAP, etc.) |
| 88 | Ignition coils (Odd cylinders) |
| 89 | Ignition coils (Even cylinders) |
| 90 | Oxygen sensor B |
| 91 | Electronic throttle control |
| 92 | Engine Control Module (ECM) relay |
| 93 | Horn |
| 94 | Fog lamps |
| 95 | High-beam headlamps |
| 100 | Oxygen sensor A |
| 101 | Engine Control Module (ECM) |
| 102 | Engine Control Module (ECM) / Transmission Control Module (TCM) |
| 103 | Rear HVAC module |
| 104 | Starter motor |
| 107 | Active shutter grille |
| 109 | Auxiliary equipment (Police package / SEO) |
| 112 | Starter relay feed |
| 114 | Windshield washer pump |
| 115 | Rear window washer pump |
| 116 | Cooling fan motor – Left |
| 121 | Right LED / Xenon headlamp module |
| 122 | Left LED / Xenon headlamp module |
| 123 | Cooling fan motor – Right |
Passenger Compartment
There are two fuse blocks located here.
Fuse Block #1
The primary fuse block is located at the end of the instrument panel on the driver side.
| Diagram | |
|---|---|
|
|
| No. | Description |
| 1 | Not used |
| 2 | |
| 3 | |
| 4 | Center console 12 V power outlet |
| 5 | Retained Accessory Power (RAP) system |
| 6 | Cigarette lighter / Center console 12 V power outlet (front) |
| 7 | Universal garage door opener (HomeLink) |
| 8 | Sunroof motor |
| 9 | Not used |
| 10 | Body Control Module (BCM) 3 |
| 11 | Body Control Module (BCM) 5 |
| 12 | Steering wheel controls illumination |
| 13 | Not used |
| 14 | |
| 15 | |
| 16 | Ignition switch (without passive entry) |
| 17 | Not used |
| 18 | Outside power mirror controls |
| 19 | Body Control Module (BCM) 1 |
| 20 | Memory seat module |
| 21 | Not used |
| 22 | |
| 23 | |
| 24 | Climate control module, console cooler control module |
| 25 | Instrument cluster, forward collision warning, passenger airbag switch |
| 26 | Steering column control module, spot lamps |
| 27 | Memory seat module, Data Link Connector (DLC) |
| 28 | Rear climate control module, Keyless Entry Module |
| 29 | Anti-theft alarm system (inclination/motion sensors, siren) |
| 30 | Not used |
| 31 | |
| 32 | |
| 33 | Auxiliary equipment (Police package / SEO) |
| 34 | Electronic parking brake relay, power adjustable pedals relay |
| 35 | Not used |
| 36 | Auto-dimming rearview mirror, rear climate control panel, backup camera, transfer case switch |
| 37 | Heated steering wheel control module |
| 38 | Steering column lock control module |
| 39 | Instrument cluster, MyLink display, Head-Up Display (HUD / UV6), heated/ventilated seat controls |
| 40 | Not used |
| 41 | |
| 42 | Trailer 12 V battery feed (with accessory package) |
| 43 | Driver power window master switch |
| 44 | Driver power seat controls |
| 45 | Not used |
| 46 | Right front heated/ventilated seat module |
| 47 | Left front heated/ventilated seat module |
| 48 | Not used |
| 49 | |
| 50 | 12 V auxiliary power outlet |
| 51 | Not used |
| 52 | Retained Accessory Power (RAP) relay |
| 53 | Ignition / Start signal repeat relay |
| 54 | Not used |
| 55 | |
| 56 | |
Fuse Block #2
An auxiliary fuse block is located on the passenger side of the instrument panel.
| Diagram | |
|---|---|
|
|
| No. | Description |
| 1 | Not used |
| 2 | |
| 3 | |
| 4 | Rear center console 12 V power outlet |
| 5 | Not used |
| 6 | |
| 7 | |
| 8 | Glove box illumination and lock |
| 9 | Not used |
| 10 | |
| 11 | |
| 12 | Steering wheel controls |
| 13 | Body Control Module (BCM) 8 |
| 14 | Not used |
| 15 | |
| 16 | |
| 17 | |
| 18 | |
| 19 | Body Control Module (BCM) 4 |
| 20 | Rear seat entertainment system (RSE) |
| 21 | Power sunroof module |
| 22 | Not used |
| 23 | |
| 24 | |
| 25 | |
| 26 | Airbag system (SRS), passenger presence sensor, Telematics / TCIM module |
| 27 | Rain sensor, passenger power window module |
| 28 | Park assist / obstacle detection module, USB ports |
| 29 | Audio / infotainment system |
| 30 | Not used |
| 31 | |
| 32 | |
| 33 | |
| 34 | |
| 35 | |
| 36 | DVD player relay, instrument cluster |
| 37 | Not used |
| 38 | Body Control Module (BCM) 2 |
| 39 | AC power inverter (110 V / 220 V) |
| 40 | Not used |
| 41 | |
| 42 | |
| 43 | |
| 44 | Right power window motor |
| 45 | Front HVAC blower motor |
| 46 | Body Control Module (BCM) 6 |
| 47 | Body Control Module (BCM) 7 |
| 48 | Audio system amplifier |
| 49 | Passenger power seat switch |
| 50 | Auxiliary power outlet 3 |
| 51 | Not used |
| 52 | Retained Accessory Power (RAP) / Body auxiliary power outlet relay |
| 53 | Not used |
| 54 | |
| 55 | |
| 56 | |
Cargo Compartment
The fuse block is located on the left side of the cargo area.
| Diagram | |
|---|---|
|
|
| No. | Description |
| 1 | Rear window defogger |
| 2 | Heated second-row seat (Left) |
| 3 | Heated second-row seat (Right) |
| 4 | Heated outside mirrors |
| 5 | Power liftgate actuator |
| 6 | Cargo area glass breakage sensors |
| 7 | Power liftgate glass switch |
| 8 | Power liftgate control module |
| 9 | Rear window wiper motor |
| 10 | Rear HVAC blower motor |
| 11 | Power folding second-row seats |
| 19 | Rear fog lamps (if equipped) |
| 12 | Power liftgate control module |
| 13 | Power folding third-row seats |
| 14 | Auxiliary power outlet |
| 15 | Rear window defogger relay |
| 16 | Power liftgate actuator relay |
| 17 | Power liftgate window release relay |
| 18 | Rear fog lamp relay (if equipped) |
| 19 | Heated mirror relay |