THERE IS A VIBRATION ON BRAKE AND GAS PEDAL

There are hundreds of reasons for vibrations to occure at the pedals. Your best bet is to see if your local mechanic can find the problem. If the vibration is present, it should be easy to find,otherwise, it may take a while. Goodluck

Usually, in GM vehicles with ABS, this is an indicator that your brakes will soon be a major problem. Get them inspected and repaired as soon as possible. It's cheaper sooner than later...I learned the hard way.

Have your lower engine mounts checked this is common with these cars