2004 GMC Sierra 1500 195,000 miles on it. Has a new battery but there are times when it won’t turnover. Usually I can wait 5 - 30 minutes then it starts. Today I had everything off but my driver door open and my inside lights came on and off. I also tried to start it and my horn would make a soft honk (if that’s the word for it going off) HELP!!! took it to shop they tighten things up and nothing. HELP!!!