Mike get's the "Don't" message. He takes his car to the junk yard, tears it apart, presumably looking for some sort of a tracking device. Then he thinks of looking in the gas tank cap (why didn't he do that before?) and pries it apart and finds some sort of a chip with a number on it which he writes down. I think he buys a similar one and puts it in another cap on another car. But I really can't tell what's going on or why. Can anyone explain, based on what's shown in this Mable episode?.. Or perhaps based on what you've learned from following episodes (which I haven't watched yet).