car hesitates ,cruise turns off by itself

First scan the car for trouble codes as these may be lost when you start messing with the electrical system. Then move on to further trouble shooting. There are a number of ground points on your car. You need to find them all, take them apart, clean and inspect the wires and put them together again making sure they are nice and tight. Also be sure your battery connections are clean and tight, both positive and negative. And while you're at it load test the battery. If its failing or 5 years or more old, it needs replacing. If you don't know how to find the ground points, or don't know what they look like google "07 Pontiac ground points" and lots of information and pics should show up. Good luck. I hope that solves your problem.

thanks Mark ill give that a try

this is for everyone, dont use E3 spark plugs , i changed out the E3 s for OEM plugs, AC s and problem of missing is solved