Hello

I have a 2003 GMC Sierra 2500 HD diesel and 4 days ago i noticed that when i am locking/unlocking my truck the horn isn't sounding like it used to. the lights still flash and the doors still lock/unlock as it should. the horn still blows when i push the center if the wheel... so any ideas. i havnt touched any of the settings in the DIC to change the lock settings.

thanks.