2003 silverado 4x4 5.3 vortec oil pressure sensor location

SOURCE: location of oil pressure sensor

it is in the valley of engine behind intake.at back of engine you can get it out with a thin walled oil sender socket.

SOURCE: locate the oil sending unit on a 2003 6.0 2500HD silverado

You will find it down by the oil filter.

SOURCE: bad sensor on chevy truck

There are 2 both located in the block..

SOURCE: MAF sensor and injectors

the mass air flow sensor is located between the air filter housing and the air inlet to the intake manifold, remove the two band clamps holding the maf sensor, clean when cold with CRC mass air flow sensor,remember to take off the three wire plug to the maf sensor,get back to me if you need more help,please rate my fix as i strive to be the best,problems,get back to me

SOURCE: 2003 Tahoe, 5.3 liter vortec flex fuel. Engine

this is a comon problem on chevy 00-06 models a computer ground ,it seems ok at sight but inside it's just holding a few wires ,get under the car on the driver side passenger there you should find a two ground wire goin to the block a big, and a small ,the small one gets coroded try to fix it and let me know how it goes ok.