I am having almost the same issue, as my A/T Oil light is lit up. I don't have any leaking fluid's. I replaced the radiator and thermostat, belts last December. I read through the reply's last week and just like the fore mentioned Pathy I have a automatic tranny. I had the system flushed last week after 275,000 miles and it was as clean as a whistle according to the attendant. I didn't replace the tranny filter as the gasket from O'reilly was incorrect. It drained readily and fluid looked great. I ran the ECU codes just for @!*%s and giggles and had a code of 55. Other things I have done to it recently is replace the A/C Heater fan and the Knock sensor and 1 fuel injector. Can anybody point me in the right direction as to why my oil light is displaying and how to check my oil pressure with a gauge.