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 location of the fuses in the passenger compartment: Chevrolet TrailBlazer (2020, 2021...)
The location of the fuses in the passenger compartment: Chevrolet TrailBlazer (2020, 2021…)

The fuse box is located behind the storage compartment to the left and below the steering wheel.

Engine Compartment

The location of the fuses in the engine compartment: Chevrolet TrailBlazer (2020, 2021...)
The location of the fuses in the engine compartment: Chevrolet TrailBlazer (2020, 2021…)

It is located next to the battery.

Luggage Compartment

The location of the fuses in the trunk: Chevrolet TrailBlazer (2020, 2021...)
The location of the fuses in the trunk: Chevrolet TrailBlazer (2020, 2021…)

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

Interior fuse box diagram: Chevrolet TrailBlazer (2020, 2021...)
Interior fuse box diagram: Chevrolet TrailBlazer (2020, 2021…)

Assignment of the fuses in the instrument panel

Fuse Name
F01LUMBAR
F02SUNROOF
F03VBAT 3
F04VBAT 7
F05VBAT 6
F06AUTO HVAC
F07CGM
F08ST WHL HTR
F09DISPLAY
F10RADIO
F11ONSTAR
F12PARK ASSIST
F13MAN. HVAC
F14WL CHARGER
F15VBAT 2
F16VBAT 1
F17SWC BKLT
F18
F19
F20CLOCK SPRING
F21OCC SEN
F22DLC
F23SDM
F24IGN SW/ESCL
F25PWR L-GATE MDL
F26SEC FUSE-2
F27PWR SEAT CO-DR
F28VBAT 8
F29DC-DC
F30PWR L-GATE MDL
F31OSRVM
F32FRT HS PWR-1
F33VBAT 4
F34FRT HS PWR-2
F35AMPLIFIER
F36SEC FUSE-1
F37PWR SEAT DR
F38DC-DC 400W / DC-DC 200W
F392022: SEC FUSE-1
F40HVAC BLOWER
F41/CB1
CB2APO (Circuit Breaker)
Relays
K01i-RAP ACC
K02RUN
K03LOGISTICS
K04
K05
K06

Engine Compartment Fuse Box

Under-hood fuse box diagram: Chevrolet TrailBlazer (2020, 2021...)
Under-hood fuse box diagram: Chevrolet TrailBlazer (2020, 2021…)

Assignment of the fuses in the engine compartment

Fuse Name
F01
F02CLSTR
F03
F04FRT WPR
F05
F06OSRVM DEFOG
F07L/GATE RELSE
F08AHL AFL MTR1
F09VENT SEAT
F10
F11AHL AFL MTR2
F12
F13REAR WNDW DEFOG
F14ISRVM REAR VIEW CAMERA
F15DEFC MDL RUN/CRNK
F16HDLP LVL
F17
F18FTZM
F19
F20
F21E-BOOST PWR1
F22TRLR ST/TRN LT – TRLR
F23STRTR PINION
F24ESCL
F25ECM TCM RUN/CRNK
F26FRT/REAR WSW PUMP
F27IGN COIL – Gasoline;
ECM PT3 – Diesel
F28AERO SH
F29AHL AFL MDL
F30STRTR SOL
F31ECM PT2
F32ENG COMP2
F33RVC
F34FRT FOG LP
F35ENG COMP1
F36ECM PT1
F37AUX OIL PUMP
F38TRLR PRK LAMP – TRLR
F39
F40AUX WATER PUMP
F41REAR WPR
F42HORN
F43PWR WNDW RT
F44REAR WPR PRK
F45A/C CLTCH
F46
F47ECM BATT
F48CLOW PLUG
F49HDLP HI LH
F50
F51HDLP HI RH
F52NOX SOOT SNSR – Diesel;
TRLR ST/TRN RT – TRLR
F53
F54PEPS
F55PWR WNDW LT
F56CNSTR VENT SOL – Gasoline;
DEFC MDL – Diesel
F57DEFC MDL
F58TCM BATT
F59
F60DEF HTR
F61
F62FUEL HTR – Diesel
F63
SF01-SF06Spare Fuses
Relays
K01
K02
K03RUN/CRNK
K04REAR DEFOG
K05STRTR SOL
K06STRTR PINION
K07A/C CNTRL
K08PT RLY
K09FUEL HTR DSL
K10
K11

Luggage Compartment Fuse Box

Trunk fuse box diagram: Chevrolet TrailBlazer (2020, 2021...)
Trunk fuse box diagram: Chevrolet TrailBlazer (2020, 2021…)

Assignment of the fuses in the trunk

Fuse Name
F01
F02RDCM ELEC
F03
F04
F05DC/AC INVERTER
F06
F07RDCM
F08RR SEAT HEAT PWR1
F09
F10RR 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.

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