The truck has been sitting for about 3 months and not started. The bat. was dead and would not hold a charge so I replaced it with a new one. I went to start it and it will only run for a second then die and the security light is on. I tried to reset it by doing the key on bump the starter watch the light 4 10 mins. turn off wait 10 sec. and repeat 3 times total but that didnt help. The Batt.and low fuel lights are coming on at the same time in the msg center. Door locks will power lock but will not unlock.