NHTSA Complaint #11678404 — 2015 CADILLAC ESCALADE

Vehicle has a shake that seems to be coming from the rear and can be felt in the seats, slightly in the steering wheel while driving at highway speeds ( 70+ ) this shake or vibration come in waves but never goes away long as you are traveling at highway speeds . It goes from an annoying shake to a bad shake and from a bad shake to annoying shake if that makes sense . I’ve spoken with different mechanics including the GM dealer and no one seems to have a fix just recommendation of expense part replacements that hasn’t worked for other Escalade owner with the same issue . I have experienced hard shifting from park to reverse and from 1st gear to 2nd but a temp sensor replacement seemed to have resolved the harsh shifting some what. It’s not as bad but still feel a gear thud when shifting after a cold start but not so much after it’s been driven for awhile. My main concern is the shaking . It’s an embarrassing ride with passengers to the point I avoid driving it on long trips For fear that my Escalade will break down completely leaving myself and family stranded. I’m not looking for free handout repairs I just want to be pointed in the right direction of a sure fire resolution so I can get it repaired and start enjoying my vehicle .