2014 5.3l silverado p0521 code

[Jfaidley]

I have no oil pressure I changed the sensor under throttlebody and have same problem is there a sending unit on the 2014 motors as I know the older motors have the sending unit on the back 

Edited January 12, 2021 by Jfaidley

[silveradosid]

did you replace the screen type filter, remove the oil pressure sensor again and then remove the filter in behind it

[Jfaidley]

Update was the oil pump also took out motor 

[Eddie 70]

1 hour ago, Jfaidley said:

Update was the oil pump also took out motor 

Crud. Did the oil pressure just go away? How many miles on the truck? My 2014 is right at 117k.

[Jfaidley]

Was running perfectly fine all at once lost pressure 62k