HI STEVE ON THE PASS SIDE OF THE BLOCK JUST ABOVE THE PAN RAIL YOU WILL FIND ABOUT 4 -5 SMALL ALLEN HEAD SCREW ,YOU CAN USE ANY ONE OF THESE TO PICK UP YOUR OIL PRESSURE , THAT IS THE MAIN OIL GALLEY FOR THE ENG , OR YOU CAN USE USE THE ONE IN THE PIX A LOT OF THE FACT,, TRUCKS CAME WITH THE SENSOR SCREWED IN THERE OR THE SW IN VARIOUS YEARS , JUST WHAT EVER IS THE EASIEST TO GET TO , ,OH ONE OTHER THING ON THE OIL PICKUP PIPE WHERE IT GOES INTO THE BLOCK MAKE CERTAIN THAT THE RUBBER ADAPTER IS IN THERE AND THAT IT FITS TIGHT IN THE BLOCK AND AROUND THE PIPE ITSELF, OR YOU WILL HAVE LITTLE OR NO OIL PRESSURE . JERRY