annoying chime when driving
 

I have a 04 gmc 2500hd,when i put my truck in drive it's fine.But as soon as I start driving the chime starts going off rapidly and won't stop until I stop the truck.Driving me nuts and not sure if it is a warning that something is wrong.HELP!:argh:

Is there any light on the dash on?

Well,it's funny that you say that.Because 4 hours ago I would have said no,it was a nice sunny day.BUt I just pulled my truck in,in the dark and I could see a faint brake light on.Pulled up on the brake release and it was ever so slightly pussed and it stopped.Problem solved.Feel like a moron,but hey atleast it's stopped.I appreciate the reply.

Haha thats fine. We have all been there!