Start Truck, Press Brake, Horn Goes Off - SIlverado 2010

[Mpick]

Hello All,

 

I own a 2010 Silverado and have recently starting having this issue. At first, I've heard a spinning noise every time I pressed the gas pedal on my truck. The spinning noise has since went away, but now every time I turn the key to my ignition and press the brake pedal, the horn goes off. This horn only goes off once for a few seconds and after I press the brake again and switch to drive the truck works fine. Also, I have noticed when I insert the key the dashboard lights come on quicker and even if I pull my key out the ignition, the truck will stay on until I press the brake.

[Colossus]

Did you get this truck new or used?  If used, when did you get it?

 

[Mpick]

Used and about 4 years ago.

[Colossus]

Any chance of it having been in a flood?   Second thought is a possible issue with the key not linking up to the security system.