I've got a 2005 Tahoe Q4 and while boating at approx. 3000 rpm a one beep warning came on. I would slow down below 3000 rpm and the beep would stop, and I'd keep boating no problem. Temp is fine. Sometimes I'd be crusing at 3000 rpm and then slow to a stop and when it stopped it would beep once. I could boat all I want below 3000 rpm, no problem; but once I get at or above 3000 rpm it would do one beep. Not the constant beeping as when overheating. Any clues???
