I need a new subcarriage for my 2005 Pontiac Grand AM as the current one is rusted.

edna11

How long do you think I should be able to drive the car after I get this replaced?

Mr_Shiftright

It really depends upon what else has been affected structurally. If I were in your shoes, I'd focus on careful examination of all the places where the suspension bolts into the car's structure. Once critical anchoring points weaken, it's a devil to repair.