Chevrolet Trailblazer 2021 Fuse Box Info
Passenger compartment fuse box location:
The instrument panel fuse box is on the underside of the driver side instrument panel.
Engine compartment fuse box location:
Luggage compartment fuse box location:
The rear compartment fuse box is behind a cover on the driver side of the rear compartment.
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuses | |
| 01 | LUMBAR |
| 02 | SUNROOF |
| 03 | VBAT_3 |
| 04 | VBAT_7 |
| 05 | VBAT_6 |
| 06 | AUTO HVAC |
| 07 | CGM |
| 08 | ST_WHL_HTR |
| 09 | DISPLAY |
| 10 | RADIO |
| 11 | ONSTAR |
| 12 | PARK_ASSIST |
| 13 | MAN. HVAC |
| 14 | WL CHARGER |
| 15 | VBAT_2 |
| 16 | VBAT_1 |
| 17 | SWC BKLT |
| 18 | N/A |
| 19 | N/A |
| 20 | CLOCK SPRING |
| 21 | OCC SEN |
| 22 | DLC |
| 23 | SDM |
| 24 | IGN_SW/ESCL |
| 25 | PWR L-GATE MDL |
| 26 | SEC FUSE-2 |
| 27 | PWR SEAT CO-DR |
| 28 | VBAT_8 |
| 29 | DC-DC AT DC-DC MT |
| 30 | PWR L-GATE MDL |
| 31 | OSRVM |
| 32 | FRT HS PWR-1 |
| 33 | VBAT_4 |
| 34 | FRT HS PWR-2 |
| 35 | AMPLIFIER |
| 36 | SEC FUSE-1 |
| 37 | PWR SEAT DR |
| 38 | DC-DC_400W DC-DC_200W |
| 39 | N/A |
| 40 | HVAC_BLOWER |
| Circuit Breaker | |
| CB1 | N/A |
| CB2 | APO |
| Relays | |
| K01 | i-RAP_ACC |
| K02 | RUN |
| K03 | LOGISTICS |
| K04 | N/A |
| K05 | N/A |
| K06 | N/A |
Engine compartment fuse box:
| Fuse/Relay N° | Functions |
| Micro Fuses | |
| 02 | CLSTR |
| 03 | N/A |
| 06 | OSRVM DEFOG |
| 07 | L/GATE RELSE |
| 08 | AHL AFL MTR1 |
| 09 | VENT SEAT |
| 10 | N/A |
| 11 | AHL AFL MTR2 |
| 12 | N/A |
| 14 | ISRVM REAR VIEW CAMERA |
| 15 | DEFC MDL RUN/CRNK |
| 16 | HDLP LVL |
| 17 | N/A-DSL |
| 18 | FTZM |
| 19 | N/A |
| 20 | N/A |
| 22 | TRLR ST/TRN LT - TRLR |
| 24 | ESCL |
| 25 | ECM TCM RUN/CRNK |
| 26 | FRT/REAR WSW PUMP |
| 27 | IGN COIL-GAS ECM PT3-DSL |
| 28 | AERO SH |
| 29 | AHL AFL MDL |
| 31 | ECM PT2 |
| 32 | ENG COMP2 |
| 33 | RVC |
| 34 | FRT FOG LP |
| 35 | ENG COMP1 |
| 36 | ECM PT1 |
| 38 | TRLR PRK LAMP - TRLR |
| 40 | AUX WATER PUMP |
| 41 | REAR WPR |
| 42 | HORN |
| 44 | REAR WPR PRK |
| 45 | A/C CLTCH |
| 46 | N/A |
| 47 | ECM BATT-GAS ECM BATT-DSL |
| 49 | HDLP HI LH |
| 50 | N/A |
| 51 | HDLP HI RH |
| 52 | NOX SOOT SNSR -DSL TRLR ST/TRN RT - TRLR |
| 53 | N/A |
| 54 | PEPS |
| 56 | CNSTR VENT SOL-GAS DEFC MDL-DSL |
| 57 | DEFC MDL |
| 58 | TCM BATT |
| Spare Fuses | |
| 01 | SPARE |
| 02 | SPARE |
| 03 | SPARE |
| 04 | SPARE |
| 05 | SPARE |
| 06 | SPARE |
| ET Fuses | |
| 48 | GLOW PLUG |
| J-Case Fuses | |
| 01 | N/A |
| 05 | N/A |
| 13 | REAR WNDW DEFOG |
| 21 | E-BOOST PWR1 |
| 23 | STRTR PINION |
| 59 | N/A |
| 62 | FUEL HTR DSL |
| 63 | N/A |
| M-case Fuses | |
| 04 | FRT WPR |
| 30 | STRTR SOL |
| 37 | AUX OIL PUMP |
| 39 | N/A |
| 43 | PWR WNDW RT |
| 55 | PWR WNDW LT |
| 60 | DEF HTR |
| 61 | N/A |
| Mini Relays | |
| K03 | RUN/CRNK |
| K04 | REAR DEFOG |
| K06 | STRTR PINION |
| K08 | PT RLY |
| K09 | FUEL HTR DSL |
| HC Micro Relays | |
| K01 | N/A |
| K02 | N/A |
| K05 | STRTR SOL |
| K07 | A/C CNTRL |
| K10 | N/A |
| Ultra Micro Relays | |
| K11 | N/A |
Luggage compartment fuse box:
| Fuse/Relay N° | Functions |
| Fuses | |
| 01 | N/A |
| 02 | RDCM ELEC |
| 03 | N/A |
| 04 | N/A |
| 05 | DC/AC INVERTER |
| 06 | N/A |
| 07 | RDCM |
| 08 | RR SEAT HEAT PWR1 |
| 09 | N/A |
| 10 | RR SEAT HEAT PWR2 |
| 11 | N/A |
| 12 | N/A |
| 13 | N/A |
| 14 | N/A |
| 15 | N/A |
| 16 | N/A |
| 17 | N/A |
| 18 | N/A |
| 19 | N/A |
| 20 | N/A |
| 21 | N/A |
| Circuit Breakers | - |
| CB1 | N/A |
| Relays | |
| 01 | N/A |
| 02 | N/A |
| 03 | N/A |
| 04 | N/A |
| 05 | N/A |
