Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 77 (ELECTRICAL COMPONENT LOCATOR)CIRCUIT PROTECTION DEVICES
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Circuit Protection Devices
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Circuit Protection Devices
WARNING: This page is about a different car, the 2002 GMC Savana and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
CIRCUIT PROTECTION DEVICES LOCATION
| Component | Location |
|---|---|
| In-Line Fuse (Left) | In left body harness, under left side of dash. |
| In-Line Fuse (Right) | In left body harness, under left side of dash. |
| In-Line Fuse (Underhood) | Near underhood fuse/relay center. |
| I/P Fuse Block | On left lower kick panel. |
| I/P Relay Block | Under left side of dash. |
| Rear Fuse Block | On left "B" pillar. |
| Underhood Fuse Block (4.3L VIN W) | On left side of engine compartment. See Figure . |
| Underhood Fuse Block (5.0L VIN M) | On left side of engine compartment. See Figure . |
| Underhood Fuse Block (5.7L VIN R) | On left side of engine compartment. See Figure . |
| Underhood Fuse Block (6.5L VIN F) | On left side of engine compartment. |
| Underhood Fuse Block (8.1L VIN G) | On left side of engine compartment. See Figure . |
| Underhood Junction Block | On right front side of engine compartment, next to radiator. |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.