Hi There, my 06' Grand Cherokee 5.7 V8 (gas conversion) has not started on three occasions over the past 4-5 months, turn the key and just a 'click' lights, radio, elec.seats all work but no turnover. After a few minutes on the jump leads from our other car it has been fine. However, this morning the jump leads remedy has not worked, I think it may be the starter motor, any ideas??? I have heard that Jeep's can be problematic with electrical issues!!!

 

could very well just be a battery, get it all tested.