Posted on November 19, 2023 Home » GM 6.5 » GM/Detroit 6.5L ENGINE CONTROLS – Oil Pressure Switch (OPS) GM/Detroit 6.5L ENGINE CONTROLS – Oil Pressure Switch (OPS) Legend (1) Oil Pressure Switch (OPS) (2) Engine Block Related Posts PRESSURE SWITCH Bosch-Common Rail System – Oil pressure switch FUSO 4M4 - LUBRICATION - STRUCTURE AND OPERATION - Engine Oil Pressure Switch• When the pressure of the engine oil to the main oil gallery drops below… Cummins 4BT - Lubricating Oil Pressure Switch - CheckRemove the lubricating oil pressure switch, install a gage, start the engine and measure the… Cummins 4BT - Lubricating Oil Pressure Switch - ReplacementDisconnect the wire from the sending unit. NOTE: The sending units illustrated may differ from…