Just ran across this site, My wife has an 07 cobalt Lt 4 door, It gets used it as a family vehicle, so not planning on doing any upgrades. I was just looking for a place to find info to help me keep everything working on it and keep it on the road.
Welcome! i know you said your not planning on doing anything to your car, but their are a few things you might want to consider doing to your car.
A cold air intake for instance, it does give horsepower increases which you said you dont need, but it also improves gas milage. Which obviously is good if this is your daily drive. also Synthetic oil is something you should look into, it will help the car run better and longer, and then you wont have to change the oil quite as much!
But look around this site, you will find plenty of useful information!