Replace Dash light bulbs on 2004 Malibu Maxx

Sounds like you have a faulty connector on the rear of the dash panel and you will probably have to remove the dash panel to access the connectors!

There should be a fuse panel on left side of the dash just inside the drivers door

I think you're going to need a new cluster. I don't have your wiring diagram, but my 2000 camaro wiring diagram is below. It has a logic device built in that controls the temp and fuel gages.
The same chip also runs the bulb test at startup. I found a used cluster online here for 70 bucks: http://instrumentclusterstore.com/I852-3662-P1152C4337.aspx

A new one from GM is about $240.

if both are not working its the brake switch on the break pedle if only one replace the light houseing thats holds the bulb

It is an LED lamp and the entire terminal needs to be replaced. I would suggest checking the fuse first, being that the replacement can run over $60

The only thing that is left for you to do is to remove the stereo and then disassemble it and remove it yourself. A little daunting but needs to be done. Sounds like it went in wrong and then became jammed

check all fuses, but you may have a body control module, problem such as connection corrosion

You have to remove the instrument cluster in order to replace the bulbs. This will include removing the knee panel under the steering wheel, the black trim piece in front of the instrument cluster, and possibly the trim and vents surrounding the radio, depending where the screws are located.

Some of the bulb holders may have notched the foil contacts on the board and the bulbs won't light after they are replaced. If that happens, you'll need to bend the tabs on the bulb holder slightly and use your finger nail to flatten out the dent in the foil.

It's not a quick fix, so you may want a dealer to service it. I suggest replacing your bulbs with LED's for longer life.

Check the dash dimmer switch which is a rheostat type switch and replace if inop.

Most likely there is a tiny bulb on the inside of your dash panel that needs replaced. Remove the panel if you comfortable to do so, or look to have a mechanic do it.