GM Repair Questions? Ask a Mechanic for Answers ASAP
It is located towards the top rear of the engine on the left side. You will need to remove the top engine cover in order to access and replace it:
remove the engine sight shield.
Fig. Using J 41712 or equivalent, remove the oil pressure sensor.
I've tried removing the cover and was unable to locate the sending unit. Is it really buried back there? Also, what is J 41712 or equivalent? Do I have to buy a special tool?
Have you actually changed one or is your answer just a cut and paste from a manual?
I have changed a few of them. It is a little buried, but is accessible without removing anything else.
The J 41712 is just a speciality socket made to fit over the entire oil sending unit without breaking the top connector. They are about $10 at Autozone or Napa. You can also use a wrench, but there isnt much room for much more that 1/4 turns of the wrench at a time and therefore somewhat time consuming.
here is another diagram:
If its not more than 15yrs old, it should still work.