I own a 2001 Saturn L300 with 107,000 miles. Whenever I get up to 60 mph the car will shake a little, and if I accelerate over 70 it shakes a lot more. What should I have checked so this doesn't keep happening? Also my service light came on after a long trip, would that have to do with anything
First have the tires balanced and see if the problem goes away. This is the most likely cause and the cheapest to fix. The check engine light has nothing to do with the car shaking at high speeds but you have another problem. You will need to ascan tool to retrieve the code that is causing the check engine light from comimg on and then take it from there.
Good luck hope this helps BYM : roll: