2004 Chevrolet Trailblazer, Changing Headlight Bulbs

This 2004 Chevrolet Trailblazer came in with the driver’s side low beam not working. This one is a little trickier than earlier models to replace the bulbs in, because the grill has to be removed first.

Not too hard though. There are several clips that hold the rill to the vehicle. Gentle prying with a flat blade screwdriver or similar tool will release most, with no problem.

A closer view. You can double click on most pictures and they will enlarge, however.

You can pry the ends out of the headlight assemblies also.

I do strongly recommend using a rag or thick tape to protect the light assembly from being scuffed.

I normally unsnap the middle portion of the grill and use my hand to work out the ends. This saves any damage to the lights. Not everybody will feel comfortable doing this though and that is why I showed how to do it with a screwdriver.

The grill coming out.

The grill out.

The bulb was blown but I also noticed some slight discoloration on the plastic so I opted to replace the harness connector while I was there. I had recently replaced a bulb in an Olds Bravada, where the connector looked okay and about two months later I had to change the bulb again along with the connector.

A new connector and bulb and this one was ready to put back together. If you need bulb connectors you can find the ones that I use at the following links.

Low Beam Connector

High Beam Connector

5 discussions on “2004 Chevrolet Trailblazer, Changing Headlight Bulbs”

  1. HID lights require a good bit of caution when working on them. Many of the bulbs have 6000-30,000 volts present at the bulb when the system is working correctly. Is your Trailblazer a special edition or for a non USA market? I have not seen one with HID bulbs yet.

  2. Hey Sparky, I have a 2006 trailblazer with the driver side low beam out as well but I have HID headlights. I checked the fuse under the hood and it was blown so I replaced it and it blew again, I put in another one and it is fine now but the light still doesn’t work. Any sugggestions? Also I saw the light flickering a few times before it went out but then it came back on again and then back out for good this time. How can I test it to figure out the problem? Thanks in advance!

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