Where is the oil sending unit on a 1995 Buick Skylark 3.1 V6?

SOURCE: where is the oil pressure sending unit located?

The pressure sending unit is located on the passenger side rear of the engine just above and slightly to the left of the filter and filter housing.

SOURCE: 2003 Buick Regal Service Engine Soon light.

The error that I'm showing for error code P1133 is 
P1133 Heated Oxygen Sensor (HO2S) insufficient switching bank 1 sensor 1(Rear Bank).  I would suggest having both of your Oxygen Sensors replaced if you haven't already had that done.  Hope this helps.  Thanks for an honest rating and for using FixYa.

SOURCE: engine wiring for 71 buick skylark 350

its the brown wire open your trunk and you will see a wire next to the trunk lach with a conecter

SOURCE: location of cooling fan relay 1993 buick skylark

Back of firewall,second relay from the passenger side of the vehicle.

hotrod53f100

• 19 Answers
• Posted on Mar 26, 2011

SOURCE: 1995 Buick Park Avenue when

These sending units are known to fail, a replacement is about $25. I had a Bonneville that did the same thing. The only real way to test it is to remove the electronic sending unit and test it with a manual gauge. In my case I had 40 psi of oil pressure with the manual gauge but the dash would read 5-10psi.