Our 2007 Chevy Equinox Lt AWD is vibrating heavily from what seems to be the rear of the car whenever we accelerate from a dead stop. Then it goes away while driving. I am curious as to what this may be . Thank you.Sorry I do not know anything else about the car.

 

I would start with checking your transmission fluid level for the transmission might slipping, also check for clogged fuel filter or clogged fuel injectors.