i bought a 96gt 3 months ago too and ive been having the same problem....i can have the oil completely topped off and if i park it facing downhill ill get a low oil light. I have good pressure so i know its not the pump.....the only thing i can think of is that the position of the sensor is too high and when you park downhill on a slope, the oil moves forward in the pan and the sensor goes off. I doubt its anything to worry about...but its soooo annoying!