Replace the Trax headlight bulbs by reaching behind the headlight housing in the engine bay, removing the dust cap, unplugging the connector, and swapping in a new bulb, then resealing and testing the lights. Verify the exact bulb type for your trim and model year to ensure compatibility.
What you’ll need
Before you start, gather these items to make the replacement smoother and safer.
- Replacement bulbs that match your Trax’s headlight specification (check the owner’s manual or the bulb labeling to confirm low-beam and high-beam types).
- Clean gloves or a microfiber cloth to handle bulbs and avoid skin oils on the glass.
- Flat-head screwdriver or Torx driver only if your model requires it to access the bulb housing.
- Flashlight or a bright work light to illuminate the back of the headlight assembly.
- Optional: trim/removal tools if you need to loosen panels or wheel-well liners for extra clearance.
With these items on hand, you’re prepared to locate the headlight housing and identify the correct bulbs for replacement.
Identify the correct bulb type
Bulb types vary by trim and market, so it’s important to confirm which bulbs your 2020 Trax uses for low beam and high beam before purchasing replacements.
Common options for the 2020 Trax
- Low-beam: often H11 (though some markets or trims may use a different form such as 9005/HB3). Check the existing bulb or the owner’s manual.
- High-beam: commonly 9005 (HB3) in many GM compact SUVs, but verify as configurations can vary.
If you’re unsure, remove the current bulb carefully to compare bases, or consult the manual and cross-check with Chevrolet parts catalogs for your exact VIN and trim. Do not guess—using the wrong bulb can affect beam pattern and longevity.
Accessing the headlight and removing the old bulb
The goal is to reach the back of the headlight housing from the engine bay, without forcing components or damaging seals. Some models may require modest disassembly of nearby panels for clearance.
- With the engine off and cooled, pop the hood and locate the back of the headlight assembly you plan to service.
- Remove the dust cap or protective cover on the back of the headlight. This is typically a round cap that you twist counterclockwise or a plug that you pull straight off.
- Disconnect the electrical connector by pressing the release tab and pulling the connector away from the bulb. Hold the connector, not the wires.
- Loosen the bulb-retaining mechanism. This could be a locking ring (twist to unlock) or a clip to release the bulb from the socket. Gently disengage it and pull the old bulb straight out.
- Inspect the socket and seat for corrosion or damage. If you see issues, address them before installing a new bulb.
- Carefully handle the new bulb by its base or use a clean glove or cloth to avoid touching the glass. Align the bulb with the socket and insert it, then secure the retaining mechanism.
Ensure the dust cap is replaced and the wiring harness is firmly connected. A quick test at the end of this step can confirm seating and wiring are correct.
Installing the new bulb and testing
Install the replacement bulb in the reverse order of removal and verify proper operation before driving.
- Insert the new bulb into the headlight housing in the same orientation as the old one, and secure the retaining ring or clip to lock it in place.
- Reconnect the electrical connector to the bulb. Make sure the connection clicks and is firmly seated.
- Replace the dust cap to seal the back of the headlight housing and minimize moisture ingress.
- Test the low-beam headlight by turning the ignition to accessory or starting the engine and activating the lights. If the low beam works, proceed to test the high beam if applicable.
- For high-beam replacement, repeat the steps above for the opposite bulb if your model uses a separate high-beam bulb in the same housing or a nearby socket.
Once both bulbs are installed and functional, give the headlights a quick final check in daylight and again in darkness to confirm proper alignment and output.
Safety and maintenance tips
Headlight work is straightforward, but a few precautions help prevent damage and ensure longevity.
- Always disconnect power and let bulbs cool before touching them.
- Avoid touching the glass part of the bulb with bare skin; oils can cause hot spots and reduce bulb life.
- Use the correct bulb type for each position to maintain proper beam pattern and compliance with regulations.
- If you notice condensation, fogging, or moisture inside the headlight assembly, have the seal inspected and repaired to prevent future failures.
General maintenance, including periodic bulb checks and alignment, helps ensure consistent nighttime visibility and safety on the road.
Alternative help and notes
If your Trax has HID or LED headlights with replaceable modules, or if you encounter unusual fitment or space constraints, consider having a dealership or certified mechanic perform the replacement to avoid damage and ensure proper alignment and warranty compliance.
Summary
Replacing headlight bulbs on a 2020 Chevy Trax is a manageable DIY task when you know the correct bulb type and how to access the back of the headlight housing. Identify the right bulbs, gather basic tools, and carefully remove and replace the bulbs from the engine bay. Recheck all connections, reseal the housing, and test the lights to ensure proper operation. When in doubt, consult the owner’s manual or a professional to confirm bulb specifications and avoid incorrect installation.