A drunk driver hit me, and my Pontiac Sunfire this past March. The car was completely totaled and started fire.
With in the first 3 weeks of owning the car, it was at the dealership 3 times. The car just would not start. The staff at the Pontiac dealership were rude. The last time it was at the shop, they kept it there for a week. Turns out there was something wrong with the fuel injectors. The brakes were horrible, and the entire front end of the car would SHAKE when any sudden pressure would be applied to the break pedal.
It was very good on gas, and it was a fun first car.
Stereo was bad. Back speaker blew the first time I put the bass to its fullest potential. Cup holders were in the way of the air controls.
The back seat was very small, yet the trunk was huge.
The reason your Sunfire seemed to vibrate due to heavy braking was the A.B.S. system. That is absolutely normal and a sign that you're A.B.S. is functioning. It's not something to worry or complain about.
Depending on how new the car was, it may have been that your rotors needed to be turned for the brakes. This would cause a shudder.
GM stereos are just junk.
And my guess is, your braking problem is the rotors.
Not ABS.
And if it is ABS, than YES, you can complain about it!
I've never heard of a car shaking that was "normal".
:)
You can see where the cup holders are before your buy it and same with the size of the backseat.
Factory stereos are not meant to be used to their highest potential, so blowing the speakers is your fault.