Hello I have a 2015 chevy suburban the back speakers went out and I was told it was the amp so i ordered a new 1 and put it in. but when i did this the rear speakers started working but the front speakers now went out !! I see there are several different part numbers listed for bose amp in the suburban which could be the problem ? I got the ac delco 84832894. wondering if I should have got ac delco 84832891 instead or if anyone has had this problem and may be able to steer me in the right direction