Tailgate doesn't open remotely or manually by pressing button on dashboard.

Hello, sounds like a possible actuator or switch issue for the tailgate. Some hands on testing will be needed. Also, check to see if there is some kind of "lock out" in place for security; it could be that the function of the power tailgate is being cancelled by such a security device. Hello, what happens if you put the tires and rims that were on originally back onto the vehicle? If the wobble disappears, you know you have a problem with the new rims and tires. Geometry can change and laws of physics can explain frequency differences that can cause vibration. If your wobble is at a specific speed, it could be as simple as a bent rim or out of balance wheels. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops