Can someone tell me what this is? I've heard of it, but had no idea what it is. thanks.

 

i dunno... sorry

 

You mean, bump stop?

 

he means bumb steer but i dnno what it is

 

Bumpsteer is when the toe angle on your wheel changes as the wheel moves up and down. So, if you car hits a bump with only one wheel, the car steers itself.

GM designs the front suspension to have no bumpsteer. It's only a problem on lowered cars.