Whenever you have coverage that borders where you can bring your car for restorations, it will eventually be a problem if you experience a malfunction while you are en route or are away from a particular service center.

Another feature on a GM extended warranty is that it begins the day you buy it, not from the original commissioning date.

This does not give warranty for corrosion or partial rust and also damages due to natural causes such as acid rain, hailstorm, etc.

You need to make a list of problems he / she might have experienced in their previous life.