i have a 07 tahoe and the low pressure light came on ...i checked the oil level which is fine so i changed the oil pressure sensor.which worked fine for a dame day!! the light came back on this morning !!! not sure what to do now

 

You need to take it to a Shop, and have them put a Analog Gauge on it, to see just what the Pressures are. THEN you'll know if it's electronic, or if you need major repair.