Review on ACDelco D1843A Original Equipment Pressure by Solomon Baron

You need a special socket. Buy it online here in the Other People Bought section of this listing. Facilitates installation. On the 4.2L Trailblazer/envoy/ascender/9-7x/bravado/rainier, the sensor is located above the fuel filter on the passenger side. It's easy to get to, and if the "No Oil Pressure, Shut Engine" light is on or there is an oil filter leak, that's the most likely cause. I had a leak from the cork itself, just like my previous Yukon.