My 04 GMC Sierra has the dash light for the oil pressure out. is there a way to change that bulb or do i need a whole new gauge cluster?

Before it is too late, I would physically check if the oil is the correct viscosity and has no fuel in it. then check there actually is oil going around the engine properly.
It could be a stuck pressure vale which means 0 pressure means very little oil.

You might try an oil pressure sending unit, first making sure the connector and harness are okay. I'm not sure, but I think there is a VSS Sensor as well, or vehicle speed sensor. Check the connector and wiring. If its okay, try a sensor. Good luck, hope this helps.

Have you recently changed the dash cluster out? If so, you may need to bring it to a dealer to have it programmed. Many of the GMC/Chevy dash clusters wore out and needed to be changed and many people tried this themselves only to bring them to be programmed by a dealer.

there two different bulbs that fit GM dash printed circuit boards one is the 194 wedge bulb and the other is small GM carry's them if you can find a smart parts counterman. NAPA carry's them also can not remember part number a new item since July 2013.

You may have a bad oil sending unit this is located under the hood near the oil filter two wires are connected to it. i would change this and see if your problem persists, if so you could have an oil pump you wont hear anything until its too late. 20 psi is all you need to keep it alive. good luck

You may want to hook up an external oil pressure gauge
to the engine to ease your mind. This would give you a regular number of the pressure. Compare it to the factory gauge in the dash. Those in dash gauges were not all that precise. If the engine is not having bearing noise I can see nothing to worry about.

I doubt it....It could be a totally worn out engine.

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Here you go. Under hood fuse block
Ign. Fuse E
and
ipc/dic
both fuses are 10 amp
I hope this helps. Take care.

yes it's normal as long as it goes that high while in motion

could be one of two things, oil pressure switch (located on top of engine behind intake) or instrument panel cluster, if your vehicle has under 70,000 miles, it's covered under warrenty