why wont my seat go slide back and forth on the second row

Hello, This is typically due to obstructions in the track or damage to the tilting/sliding mechanism inside the base and back of the seat. If tilting the seat does not allow it to roll, it is likely defective, but lubrication could be the key. You may have extended warranty on that portion of the vehicle, so contact the dealer before you spend any time or money trying to figure it out.