Doesn't make ding noise for headlites left on or key in ignition when door open. on 2008 Chevrolet Cobalt

Cobalt LS. Also no noise for turn signals on. The actual signals all work. Have checked fuses. Very occasionally the noises will work, so it's on & off problem, but mostly not working.

Asked by for the 2008 Chevrolet Cobalt
I have a 2008 cobalt with the same problem. The sound comes from the left front door speaker. When I removed the door panel found a loose and corroded connection, replaced door speakers with aftermarket. everything has been working fine since. hope this helps.