Table of Contents
Most electrical circuits in this American crossover are protected by fuses. High-current consumers are connected via relays. Most protective elements are located in the power distribution fuse blocks in the passenger compartment and under the hood.
The information provided in the diagrams applies to the 3rd-generation Chevrolet Tahoe (GMT900) for the 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, and 2014 model years.
Engine Compartment
The underhood fuse block is located on the driver’s side. To access it, you must remove the protective cover.
General view.
| Diagram | |
|---|---|
|
|
| No. / Name | Description |
| FAN HI | Cooling fan - High speed |
| FAN LO | Cooling fan - Low speed |
| FAN CNTRL |
Engine cooling fan control |
| HDLP LO / HID |
Low beam headlamps |
| FOG LAMP |
Fog lamps |
| A/C CMPRSR |
Air conditioning (A/C) compressor |
| STRTR | Starter |
| PWR / TRN | Powertrain |
| FUEL PUMP | Fuel pump relay |
| PRK LAMP | Parking lamps |
| REAR DEFOG | Rear window defogger |
| RUN / CRNK |
Ignition switch (Run/Crank) |
| 1 | Right stop lamp / Trailer turn signal |
| 2 | Electronic Suspension Control / Evaporative Emission (EVAP) System |
| 3 | Left stop lamp / Trailer turn signal |
| 4 | Engine control system components |
| 5 | Engine Control Module (ECM), Electronic Throttle Control (ETC) |
| 6 | Trailer brake controller |
| 7 | Windshield washer pump |
| 8 | Oxygen (O2) sensors |
| 9 | Anti-lock Braking System (ABS) 2 |
| 10 | Trailer backup lamps |
| 11 | Low beam headlamp, driver’s side |
| 12 | Engine Control Module (ECM) - Battery |
| 13 | Fuel injectors, Ignition coils (Right/Even bank) |
| 14 | Transmission Control Module (TCM) - Battery |
| 15 | Vehicle backup lamps |
| 16 | Low beam headlamp, passenger’s side |
| 17 | Air conditioning (A/C) compressor |
| 18 | Oxygen (O2) sensors |
| 19 | Transmission Control Module (TCM) - Ignition |
| 20 | Fuel pump fuse |
| 21 | Fuel System Control Module (FSCM) |
| 22 | Headlamp washer |
| 23 | Rear window washer |
| 24 | Fuel injectors; Ignition coils (Left/Odd bank) |
| 25 | Trailer park lamps |
| 26 | Park lamps, driver’s side |
| 27 | Park lamps, passenger’s side |
| 28 | Fog lamps |
| 29 | Horn |
| 30 | High beam headlamp, passenger’s side |
| 31 | Daytime Running Lamps (DRL) (if equipped) |
| 32 | High beam headlamp, driver’s side |
| 33 | Daytime Running Lamps (DRL) 2 (if equipped) |
| 34 | Sunroof |
| 35 | Ignition switch, Security system |
| 36 | Windshield wipers |
| 37 | SEO B2 Special Equipment Option (Power) |
| 38 | Adjustable pedals |
| 39 | HVAC system (Battery) |
| 40 | Airbag system (Ignition) |
| 41 | Audio amplifier |
| 42 | Audio system |
| 43 | Miscellaneous equipment (Ignition); Cruise control |
| 44 | Liftgate release actuator |
| 45 | Airbag system (Battery) |
| 46 | Instrument cluster |
| 47 | Not used |
| 48 | Auxiliary HVAC system (Ignition) |
| 49 | Center High-Mounted Stop Lamp (CHMSL) |
| 50 | Rear window defogger |
| 51 | Heated outside mirrors |
| 52 | SEO B1 Special Equipment Option (Power) |
| 53 | Cigarette lighter, Auxiliary power outlets (if equipped) |
| 54 | A/C compressor relay |
| 55 | HVAC system (Ignition) |
| 56 | Engine Control Module (ECM), Auxiliary fuel pump (Ignition) |
| 57 | Cooling fan 1 |
| 58 | Automatic level control air compressor |
| 59 | Heavy-duty Anti-lock Braking System (ABS) |
| 60 | Cooling fan 2 |
| 61 | Anti-lock Braking System (ABS) 1 |
| 62 | Starter |
| 63 | Stud 2 (Trailer brakes) |
| 64 | Left Bussed Electrical Center (LBEC) 1 |
| 65 | Power assist steps |
| 66 | Not used |
| 67 | Transfer case |
| 68 | Stud 1 (Auxiliary power, Trailer wiring) |
| 69 | Mid-Bussed Electrical Center (MBEC) 1 |
| 70 | HVAC blower motor |
| 71 | Power liftgate module |
| 72 | Left Bussed Electrical Center (LBEC) 2 |
Passenger Compartment
Fuse Block #1
The instrument panel fuse block is located on the driver’s side, at the edge of the instrument panel.
General view.
| Diagram | |
|---|---|
|
|
| No. | Description |
| 1 | Second-row seats |
| 2 | Rear accessory power outlet |
| 3 | Steering wheel controls illumination |
| 4 | Driver door module |
| 5 | Dome lamps, Driver’s side turn signal |
| 6 | Driver’s side turn signal, Stop lamp |
| 7 | Instrument panel illumination |
| 8 | Passenger’s side turn signal, Stop lamp |
| 9 | Passenger door module |
| 10 | Power door locks 2 (Unlock feature) |
| 11 | |
| 12 | Stop lamps, Center High-Mounted Stop Lamp (CHMSL) |
| 13 | Rear HVAC system controls |
| 14 | Power outside mirrors |
| 15 | Body Control Module (BCM) |
| 16 | Auxiliary power outlets |
| 17 | Interior lamps |
| 18 | Power door locks 1 (Unlock feature) |
| 19 | Rear seat entertainment system |
| 20 | Ultrasonic Rear Parking Assist (URPA), Power liftgate |
| 21 | Power door locks 1 (Lock feature) |
| 22 | Driver Information Center (DIC) |
| 23 | Rear window wiper |
| 24 | Cooled seats |
| 25 | Driver seat module, Remote Keyless Entry (RKE) system |
| 26 | Driver power door lock (Unlock feature) |
| LT DR | Driver’s side power window circuit breaker |
| LTDR | Driver door wiring harness connector |
| BODY | Body wiring harness connector |
Fuse Block #2
The center bussed electrical center is located beneath the instrument panel, to the left of the steering column.
| Diagram | |
|---|---|
|
|
| Name | Description |
| CB1 | Passenger power window circuit breaker |
| CB2 | Passenger seat circuit breaker |
| CB3 | Driver seat circuit breaker |
| CB4 | Power sliding rear window |
| BODY 2 | Body wiring harness connector 2 |
| BODY 1 | Body wiring harness connector 1 |
| BODY 3 | Body wiring harness connector 3 |
| HEADLINER 3 | Headliner wiring harness connector 3 |
| HEADLINER 2 | Headliner wiring harness connector 2 |
| HEADLINER 1 | Headliner wiring harness connector 1 |
| SEO / UPFITTER |
Special Equipment Option (SEO) / Upfitter wiring harness connector |
Veeeeery goooooood