1990 Chevrolet G Series Van (G20) Q&A
1990 Chevrolet G Series Van (G20) Question: Veicle has oil pressure, but oil guage doesn't register any.
It is probably the sending unit. Located on top of the motor towards the back on the drivers side. - ASE_TECH
DID they give you the correct sending unit for your gauge and did anyone actually physically test the oil pressure with a regular shop guage at the port where the sending unit goes .ANYWAY yes they have different sending units for different gauge scales some go to diff. PSI ratings and the wrong sender may not send a 'valid' signal.just a thought ....actually I've got to go check the air pressure in my head .good luck. - ziptie12