95 chevy lumina dies about 5 mins agter starting and driving will start right back up after it sits.

...i'm getting ready for a trip out of town... so gotta be quick here... assuming you have a 3.1/V6... replace your crankshaft sensor... the car is a '95 (old)... could use to replace that sensor anyway, they rot, crack, go bad... they'll often work when cool, then shut down when hot, after car cools, starts again and runs, till hot again, etc... frequently the culprit regarding your symptoms, and it's a cheap part, and relatively easy to change, underside, rear of engine, bout middle most to passenger side, 10mm bolt, be careful with connector & wires, also old, may be rotton as well, above that is the Knock Sensor, maybe change that as well since you'll be in the neighborhood, more money, harder to change... check all wiring, hoses, connectors while doing job, car is old, things get rotten and crack and fall apart... that's all i can give you for now, good luck, gotta go!