When I bought my 2006 2LT, the previous owner had already swapped out the head unit. As a result, the car has no turn signal or headlight chime. Is there a module I can use to restore the sounds or would my only way to get them be to reinstall a factory radio?

 

You can install a module adapter to get the chimes back , look at Crutchfield.com for the correct part

 

Hopefully the previous owner didn’t hack and splice when they replaced the radio. If they did then you may need to acquire some original plug ends to be able to use the interface module.

 

Do not assume the absence of chimes and clicks is due to the radio install. A bad speaker will do the same. Prove the driver side front speaker works by isolating it using the radio's fade and balance controls. Do the same for the other speakers.