Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Sorry I gave you info on the old body style tail gate system . On your body site the panel is held on with plastic push fasteners. If you start pulling at bottom it should release. Be aware that the plastic retainers like to break when removing panel. You say you here the actuator working so either you have a bad cable or the latch is bound up. I am going to attach a wiring diagram for you just in case you need it. as for any other way to open window sorry there is no other way other than the electric switch or removing the panel to manually operate the latch.