The Cobalt SS is a car that screams to be tinkered, tottered and toyed with. However, when it comes to playing with things like engine control harnesses you have to be careful to make sure you do things correctly or you could seriously mess up your car, mmmk? Now we know that tons of Cobalt SS owners are going to opt for the self-install of the kit and that’s all well and good if you’re up to the task but make sure you at least do the following.