Door speakers

[Kats Bee]

Howdy all, new to the forum but have owned a 2004 Avalanche for 12 years. Recently I noted that the only speaker I have working is on the passenger side front door. It is nice and loud but none of the other speakers are working. This truck does NOT have Bose or OnStar. Is there an amp somewhere in this truck that might have gone bad on me? Thanks, Jim

 

[zora]

I would open the door panel on the passenger side and using a test light or voltmeter see if you have a signal going to the speaker. The speakers could have failed.