Shifting Problem......... on 1999 GMC Yukon

My shift is stuck in "Park"! My neighbor had a Theory;short out the two wires,connected to column from the brake and/or safety mechanism.....It worked! But,when;I tried the same thing,NOTHING! I Noticed;that,the signals were OUT(due to shorting the wires). How can I correct this Problem

1 answer
Do your brake lights work? The brake switch needs to work so it can trigger the solenoid to release the Shift Lever. Good Luck!