Okay so I have a 1990 integra but for graduation my mom gave me her 1998 gmc jimmy. Now i have 2 cars and i want to sell the jimmy except there is something wrong with it .

After of about 45 minutes of driving the car will suddenly shut off with out any warning signs. radiator fluid is good and so is all the other fluids. A cam gear sensor was replaced and didn't do anything then i replacr the ect sensor (engine coolant temperature sensor) and still nothing.
The fuel pump was replaced 2 years ago so im not sure if that has anything to do with it. And my uncle thinks it's my distributor.

I am so lost!!! please help