1999 Montana stabalizer or sway bar bushing bolts
 

Tried to loosen the stabilizar or sway bar 15mm bushing bolts with a 6 point socket and a 1/2" socket wrench. No go. How tight are the 2 bolts supposed to be. My Montana is a 99 so I am betting they are rusted in place. On Youtube there is an A1Auto video and the mechanic says they are not hard to remove. He should try removing mine. Need to replace bar as it is broken on the driver's side. Looking at solid bar replacement so it won't fail again.
Any suggestions on removing bolts and a replacement bar?