This must have been covered 100 times...but one is out intermittently on the '04....how to access??

From inside the trunk, pull back the gray felt in the upper back corners. There are two nuts on bolts that hold the entire unit in. Take these nuts off, and the light assembly can be pulled out of its socket from the outside. Then you have access to the bulbs from the back side of the unit. Hope this helps. It is very easy to do.

Bill

Cynthia;

Here'* a How To for the 97-99, which is pretty darn close to what you want https://www.gmforum.com/t278819/

Also, please add your year and trim of your vehicle to your signature line. That way when you start asking questions in other areas of the forum, we all have a better idea on how to assist you. Click on "Quick Links" above, go down to "User Control Panel" and then click on "Edit your Signature" It'* pretty straight forward from there.

My 04 has a stiff plastic liner in that area that is held in with the plastic nuts on what appear to be long bolts (2) used to hold the trunk net in place....I will try to get around it to the felt and find the 3 nuts that hold the light fixture in place...

The plastic liner is held in with the plastic nuts that are actually on the end of the tail light assembly bolts. Once you get the liner off and the upholstery, just remove the nuts from the bolts and you've got it!