The Firestone Stores used to have the on car machine....don't know if they still do.....probably have to find a independant shop thats been around for awhile....one that handles larger vehicles , truck and RV;s..they generally have all that equipment.

 

Thanks for the suggestion. I will look into it!

 

I own a HHR 07 LT 60K MILES and notice some vibration under floor pan, vibrates harder when I accelerate form 30-60mph. uphill feels more, I know there is always some vibration, but this one its not normal, I took it to the dealer and the rotors are ok, brake pad, shocks, engine supports, and the vibration still there, not sure if can be the heat shield for the exhaust system is loose? need help...

 

sounds like harmonics under the car...next time go to a lower gear right away and se if it goes away..you may be lugging....