left turn signal works some of the time
all of the chimes, buzzers and bells are fed thru you front speakers. if u have the fader to the rear speakers, you probally wont hear them. if that is not the case did u put in an aftermarket radio, did u get the adapter module. u HAVE to have it if u want the chimes or onstar to work . last of all, if the front amp in your stock radio went bad ,replace the radio. hope this helps.
teh adapter u need is made by metra, part #gmos-01 its for modle years 2005-2008
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