The Chevrolet TrailBlazer, reintroduced in 2020 as a compact SUV, combines sporty design, modern technology, and practicality, appealing to both urban drivers and those seeking adventure. A crucial component of the TrailBlazer’s functionality is its electrical system, with the fuse box and relays playing vital roles in ensuring the smooth operation of its various features and systems.
The fuse box in the 2020-2022 Chevrolet TrailBlazer is essential for protecting the vehicle’s electrical circuits. These circuits power key systems such as engine management, lighting, infotainment, climate control, and various power accessories like windows, seats, and mirrors. The TrailBlazer typically has two main fuse boxes: one located in the engine compartment and another inside the cabin, usually found beneath the dashboard or near the passenger side footwell. The engine compartment fuse box manages high-power systems related to the engine and transmission, while the interior fuse box oversees comfort and convenience features.
Each fuse in the fuse box is linked to a specific circuit and is designed to “blow” in the event of an overload or short circuit. This action cuts off the power supply to prevent damage to the circuit and the vehicle’s components, thus ensuring safety and minimizing repair costs. For example, if systems like the air conditioning or infotainment system stop functioning, checking the corresponding fuse is a critical troubleshooting step.
Relays in the Chevrolet TrailBlazer are electrically operated switches that manage the power supply to high-current systems such as the starter motor, fuel pump, and cooling fans. Relays allow these systems to be controlled by low-power circuits, preventing overload on the vehicle’s wiring and switches, and enhancing the reliability and efficiency of the electrical system.
Regular inspection and maintenance of the fuse box and relays are crucial for preventing electrical problems. A blown fuse or faulty relay can cause system failures, such as the engine failing to start if the starter relay is defective, or overheating issues if the cooling fan relay malfunctions. Replacing these components with the correct specifications is essential to restoring functionality.
Understanding the importance of the fuse box and relays helps TrailBlazer owners maintain their vehicle’s electrical system. This ensures that all features operate reliably and safely, providing a comfortable and efficient driving experience that highlights the TrailBlazer’s versatility and modern appeal.
MUST READ: DYI – How to Check Car Fuses?
(2020-2022) Chevrolet TrailBlazer fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Chevrolet TrailBlazer 2020-2022 fuse assignment
- Cigar lighter (power outlet) fuses in the Chevrolet Traverse are located in the Engine Compartment Fuse Box (see fuses “AUX POWER” (Auxiliary Power), “CIGAR LIGHTER” (Cigar Lighter), “PWR OUTLET” (Power Outlet) and “RR APO” (Rear Accessory Power Outlet)).
Year of production: from 2020, 2021, 2022
Passenger Compartment
The fuse box is located behind the storage compartment to the left and below the steering wheel.
Engine Compartment
It is located next to the battery.
Luggage Compartment
The rear compartment fuse block is behind a cover on the driver’s side of the luggage compartment.
Fuse Box Diagrams
Passenger Compartment Fuse Box
Assignment of the fuses in the instrument panel
| № | Fuse Name |
|---|---|
| F01 | LUMBAR |
| F02 | SUNROOF |
| F03 | VBAT 3 |
| F04 | VBAT 7 |
| F05 | VBAT 6 |
| F06 | AUTO HVAC |
| F07 | CGM |
| F08 | ST WHL HTR |
| F09 | DISPLAY |
| F10 | RADIO |
| F11 | ONSTAR |
| F12 | PARK ASSIST |
| F13 | MAN. HVAC |
| F14 | WL CHARGER |
| F15 | VBAT 2 |
| F16 | VBAT 1 |
| F17 | SWC BKLT |
| F18 | – |
| F19 | – |
| F20 | CLOCK SPRING |
| F21 | OCC SEN |
| F22 | DLC |
| F23 | SDM |
| F24 | IGN SW/ESCL |
| F25 | PWR L-GATE MDL |
| F26 | SEC FUSE-2 |
| F27 | PWR SEAT CO-DR |
| F28 | VBAT 8 |
| F29 | DC-DC |
| F30 | PWR L-GATE MDL |
| F31 | OSRVM |
| F32 | FRT HS PWR-1 |
| F33 | VBAT 4 |
| F34 | FRT HS PWR-2 |
| F35 | AMPLIFIER |
| F36 | SEC FUSE-1 |
| F37 | PWR SEAT DR |
| F38 | DC-DC 400W / DC-DC 200W |
| F39 | 2022: SEC FUSE-1 |
| F40 | HVAC BLOWER |
| F41/CB1 | – |
| CB2 | APO (Circuit Breaker) |
| Relays | |
| K01 | i-RAP ACC |
| K02 | RUN |
| K03 | LOGISTICS |
| K04 | – |
| K05 | – |
| K06 | – |
Engine Compartment Fuse Box
Assignment of the fuses in the engine compartment
| № | Fuse Name |
|---|---|
| F01 | – |
| F02 | CLSTR |
| F03 | – |
| F04 | FRT WPR |
| F05 | – |
| F06 | OSRVM DEFOG |
| F07 | L/GATE RELSE |
| F08 | AHL AFL MTR1 |
| F09 | VENT SEAT |
| F10 | – |
| F11 | AHL AFL MTR2 |
| F12 | – |
| F13 | REAR WNDW DEFOG |
| F14 | ISRVM REAR VIEW CAMERA |
| F15 | DEFC MDL RUN/CRNK |
| F16 | HDLP LVL |
| F17 | – |
| F18 | FTZM |
| F19 | – |
| F20 | – |
| F21 | E-BOOST PWR1 |
| F22 | TRLR ST/TRN LT – TRLR |
| F23 | STRTR PINION |
| F24 | ESCL |
| F25 | ECM TCM RUN/CRNK |
| F26 | FRT/REAR WSW PUMP |
| F27 | IGN COIL – Gasoline; ECM PT3 – Diesel |
| F28 | AERO SH |
| F29 | AHL AFL MDL |
| F30 | STRTR SOL |
| F31 | ECM PT2 |
| F32 | ENG COMP2 |
| F33 | RVC |
| F34 | FRT FOG LP |
| F35 | ENG COMP1 |
| F36 | ECM PT1 |
| F37 | AUX OIL PUMP |
| F38 | TRLR PRK LAMP – TRLR |
| F39 | – |
| F40 | AUX WATER PUMP |
| F41 | REAR WPR |
| F42 | HORN |
| F43 | PWR WNDW RT |
| F44 | REAR WPR PRK |
| F45 | A/C CLTCH |
| F46 | – |
| F47 | ECM BATT |
| F48 | CLOW PLUG |
| F49 | HDLP HI LH |
| F50 | – |
| F51 | HDLP HI RH |
| F52 | NOX SOOT SNSR – Diesel; TRLR ST/TRN RT – TRLR |
| F53 | – |
| F54 | PEPS |
| F55 | PWR WNDW LT |
| F56 | CNSTR VENT SOL – Gasoline; DEFC MDL – Diesel |
| F57 | DEFC MDL |
| F58 | TCM BATT |
| F59 | – |
| F60 | DEF HTR |
| F61 | – |
| F62 | FUEL HTR – Diesel |
| F63 | – |
| SF01-SF06 | Spare Fuses |
| Relays | |
| K01 | – |
| K02 | – |
| K03 | RUN/CRNK |
| K04 | REAR DEFOG |
| K05 | STRTR SOL |
| K06 | STRTR PINION |
| K07 | A/C CNTRL |
| K08 | PT RLY |
| K09 | FUEL HTR DSL |
| K10 | – |
| K11 | – |
Luggage Compartment Fuse Box
Assignment of the fuses in the trunk
| № | Fuse Name |
|---|---|
| F01 | – |
| F02 | RDCM ELEC |
| F03 | – |
| F04 | – |
| F05 | DC/AC INVERTER |
| F06 | – |
| F07 | RDCM |
| F08 | RR SEAT HEAT PWR1 |
| F09 | – |
| F10 | RR SEAT HEAT PWR2 |
| F11 | – |
| F12 | – |
| F13 | – |
| F14 | – |
| F15 | – |
| F16 | – |
| F17 | – |
| F18 | – |
| F19 | – |
| F20 | – |
| F21 | – |
| CB1 | – |
| Relays | |
| K01 | – |
| K02 | – |
| K03 | – |
| K04 | – |
| K05 | – |
Conclusion
For owners and enthusiasts of classic Chevrolet TrailBlazer 2020-2022, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Chevrolet’s craftsmanship and innovation in the automotive industry during that era.
