I have a 2003 GMC Sierra 3500, 6.0L, automatic. After running the truck for hours, I shut it off for about an hour. When I went to start it again, all I get is a click coming from the dash somewhere. When I turn the key on, the shift indicator goes right to 2(underlined). No, it’s NOT the Neutral Switch, I changed that out several months ago and it functions fine. I’ve checked the relay, battery connections and everything obvious. A friend thinks it’s the starter. I don’t see how a bad starter would effect the shift indicator. The truck functioned fine while plowing for four hours previous. There’s another storm coming this weekend, I need this truck- Any help would be greatly appreciated. Thanks for your time.