5.7 liter
SOURCE: oil pressure on a 2004 5.3 liter silverado at idle is around 20
The pressure to be most concerned with is the reading in gear at idle with engine warmed up...Low end really should not be below 20. If pressure wanders, change the sending unit and check actual pressure with a mechanical gauge if necessary. The age and quality of your oil, as well as temperature all play a part in pressure, as well as internal wear from time & miles of use. If pressure changes with rpm, that is normal. 40psi is good while driving.
need more info just ask.
SOURCE: where is the oil sending unit on a 93 chevy silverado 350 engine
the oil sending unit is located at the back of the motor right below the rotor cap it is about 3 inches long and has a 3 wire plug hooked t it
SOURCE: Where is the oil sending unit located on a 2003 Chevy Tahoe 5.3 engine
its in the block behind intake manifold .
SOURCE: how to replace oil pressure switch on 1988 Chevy
Hi my name is Tom and I am here to help.
aaah!! the wonderful chevy 350. Probably the best engine ever made. It has had a track record few other engines can match.
Enough of old school. Unless they have moved the sensor in the last 30 years, you should find the sensor below the head 1/2 way to the oil pan.
Remove the electrical connection on the top and using the proper open ended wrench unscrew the sensor. Replace with new sensor and reattached the wire and you are home free.
If I forgot something or I can be of further help feel free to call or email me. Either way, please rank my advice so I can become a better helper in the future.
TomE(414-475-5968)
SOURCE: were is the oil presure
ON THE REAR TOP PART OF THE MOTOR YOU HAVE TO CRAWL ON TOP OF THE ENGINE, HOPE THIS HELPS YOU. THE ARROW POINTS TOWARD THE FRONT OF THE ENGINE SO CAN HAVE AN IDEA OF THE LOCATION=.........I UPLOADED THIS PICTURE TO HELP YOU OUT.... 
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