i just bought a 2007 tahoe a couple weeks ago and now the gear shifter or something else that is causing my locks to lock and unlock repeatedly and now it is having trouble staying in gear. also the gear shifter itself is really loose and idk if that may have something to do with it. i dont want to take it to the dealer just to have them charge an outrageous amount of money to just look and see what may be wrong. but i am afraid it may end up tearing up my transmission if it shifts into the wrong gear while im driving or cause an accident. any advice would be greatly appreciated