Oil pressure light an loud engine knocking

DON NOT DRIVE THE CAR, DO NOT DRIVE THE CAR..sounds like your oil pump maybe going or is gone, thats why you hear the knocking, lack of oil pressure. It needs to be looked at...

If it is knocking it may be too late and damage already done.

You have most likely burnt the engine up , how often do you check the oil , and how far have Tahoe bin driven with oil light on and or loud nocking.?

Did it dawn on you that your out of oil hence the oil light. You burnt that engine up only $10,000 for a new one.