50+ Gm Oil Pressure Switch Wiring Diagram Pictures. Here is the wiring diagram for the relay. Oil pressure switch for reduced oil pressure p164d malfunction.
Pcm sent oil pressure info to cluster via serial data. Oil pressure sensor, gm 12616646, acd d1846a, $34 on amazon oil pressure switch socket, lisle 13250, $9 on amazon. Install a toggle switch in the overdrive ground wire.
Circuit numbers and wire identification will be done according ground.
So, it's probably just a pressure switch as shifted mentioned above. Refer to section 4e for switch locations. The missing connection is a ground there are various arguments for and against using either cht or oil temperature as the 'coolant'. The oil pressure switch indicates loss in the engine's oil pressure.
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