I had to take my Tahoe in today because of a grinding noise that vibrated the floor on the drivers side. I dont know if it is from the brakes or drive shaft or what. It only happens when it is under 30mph. I wont find out what it it until monday when they work on it. Do any of you have any idea what it might be? It only has 1,800 miles and i cant think what it might be. thanks