ACDelco 94158328 OE Oil Pressure Gauge Sensor Fitting Seal.
These copper seals fit the banjo bolt that holds it to the block.
For 2001-2002 GM 6.6L Duramax LB7
On the 01 and 02 LB7 engines, the oil pressure switch is mounted on an aluminum stand off. These copper seals fit the banjo bolt that holds it to the block. 2 required per engine