I have a 2005 verado 225 with 60 hrs on it. Today it started revving a little higher in idle and when I would put it into gear it would jerk. When taken out of gear, it would idle even higher for a second, even up to 3k rpm's, then go back down. Then I would go to put it in gear again and it wouldn't engage. Just revved up. Also when revving up in gear without engaging, an alarm would beep for a few seconds. Anyone know what could be causing this?