Your grandmother only co-signed. She would not be responsible for it unless he did not pay. Since she has passed away he is totally responsible for paying the debt.
Kill him or....... I'm sorry but that's all you can do!
shop wanted 344.00. paid soninlaw 200.00 to do it. it was a full day. if you take your time ( you have to) and not get disgruntled, youcan do it. the front three are easy, self explanatory. for the back three ( firewall side ) jack up front of car. take off splash guard in each fender well. get the longest extensipn you can find. go to work. do not give up.