My oil pressure gauge is not working

You will not be able to replace the oil gauge on this truck with a typical pressure gauge as yours is an on off switch and not a pressure gauge. Meaning it tells you if it is normal pressure (within a set range) or low. Once it is below that threshold it turns the light on and the gauge shows low.

So if you put a pressure gauge on it that shows the actual PSI it will not operate.

I included the info below on this.

You will have to find a replacement sender unit that will fit in this engine and a gauge to go with it.

Please review this material and let us know what questions you have. Thanks