When I got a clicking and lights and stuff on my truck, turned out to be a bad battery?
You MUST have a good battery fully charged to work all the onboard electronics in our trucks.
Hope this helps ya?
Al.
Oh BTW, give that stealership hell. They should replace stuff when you have that warranty. If they don't, go somewhere else.

 

leaving the battery disconnected won't reset your pcm the way you may think it will. what you need to do is take out the fuse..#23 and turn your ignition all the way as if you were starting it and you will hear the chime as if your lights were on and you turned your ignition off. then replace the fuse and see if it starts. I don't remember if you said if you had any codes?