hi im new here and i just bought i 2001 pontiac grnd prix gt, i alwayshad monte carlos from 1983 and a 1985 and recently a 2002,i totaled that, so i got ths 3 years after, im very happy with it but the back door windows wont go down for some reason,the guy i got it from had them down but i cant figure it out, its a 4 door, now does this have a child safty lock on it or something?