So, about 3 months ago, my lift gate stopped working. Will not unlock and raise in normal fashion. So i did a little research. Removed the panel from inside the truck to open it manually. A new locking mechanism, new shocks, closed the gate hit the latch button, and still NO UNLOCK. Checked all fuses. nothing is blown. I am not sure where to go from here. Unit is a 2007 suburban LTZ. Should i send this locking mechanism back or..............HELP!!!!!!!!!!!!!!