I have a 2008 crew cab silverado. Everytime I get in, only certain speakers work. Most of the time it is the front passenger and rear driver. Sometimes it's only the driver rear. Today it was just the pillar tweeters only. I dont think I have ever heard the driver front. Thought it was a bad stereo so I had a 400 dollar Kenwood installed. Still have the same problem. I am going to replace the 4 door speakers but have read from other customers that didnt help. The pillar tweeters always work. Is this a wiring problem or are the speaker wires running through some module? I have tried to find a routing diagram to trace them out but cant find one. Almost to the point of just pulling all new wire to the speakers. I've read that's a common problem on the 2007-2010. What else can I check? Sure would like to hear some good sound! It's different everytime I get in. Sometimes the front passenger speaker will just start working driving down the road. Where do I go from here? All the harnesses for steering wheel is new. Spent over 600 bucks and would like to hear it. Where do I go next?

 

broken wires in the door harness?

 

I had the same problem with my 2008 Silverado. I replaced the speakers in the doors. Problem solved