2009 Pontiac G6 Need Help!

2009 PONTIAC G6
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PAULAPEY
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64,000 miles. Car died and wouldn't start, odometer reads "error". Had it towed to the local Chevy dealer. He calls and says the fuse box needs to be replaced at $700 and did I know that 3 fuses were missing (5, 13, 16) and then I may need some modules replaced at another $600. Started looking online for similar problems. I did find a couple of technical service bulletins that talked about. "battery ground cables" and "damaged or poor terminals for under hood fuse block". Would this cause the problems I'm seeing now?
These are codes he said he got:
U2105
U2106
U2107
U2108
B0081
B1325
B1370
B3055

Meanwhile, I contact GM Customer Service and mention the technical service bulletins to her and the next day the Chevy dealer calls me and says they now think it may be the battery cables and that would cost $403 to replace, but may still have to replace the fuse box (not sure) and the modules may reset themselves or they may need to be replaced.
Not sure what to believe now. Any help would be appreciated!
Jun 5, 2013 at 2:58 PM
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HMAC300
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first thing check battery condition including load test. a bad battery will cause what is called false codes.the others are the modules are not getting any communication. I think it's a cable or battery problem not what they say also the cables don't go bad this soon normally and if they are cleaned, bat to eng and bat to body that as well as battery checked for being good may fix your problem.
Jun 6, 2013 at 6:44 AM
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PAULAPEY
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Thank you hmac300, I really appreciate your help.
What about the fuse box, is what they're saying true, that the fuse box could be fried? Wouldn't they be able to test that and not just guess. They are saying they would need to replace the cables before they would know if the fuse box was bad, is that true?
Jun 6, 2013 at 8:46 AM
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HMAC300
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the fuse box could be fried but all they need to do is take the damn thing apart (the top comes off) and look. No they don't need to replace the cables to look at a fried box, it would show being melted.the pic i'm sending shows fuses and a fusible link anyone of these could effect your car. I have checked the manual that I have and there Is no mention of burnt fuse boxes. I'm not telling you what to do but something seems amiss here. I still think it's a battery or cable issue but you need to know what voltage battery is as well as load test first. ask to take alook at the fried box and see what they tell you. if they him haw around then have it towed to an independent garage or another dealer.
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Jun 6, 2013 at 9:31 AM
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PAULAPEY
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Thank you hmac300, you're the best!
This whole experience with the dealer has been amiss since I started. Thanks goodness I had the foresight to do some research and send you this question. I am going to the dealer today and will ask to look at the fuse box. I found an independent garage in my neighborhood(recommended by a friend) who says he will look at the car and if the cables need to be replaced will do it for $20 and the cost of the cables, as opposed to $340 at the dealer. Is it because I'm a woman and they can see us coming a mile away! :)
Jun 6, 2013 at 9:51 AM
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HMAC300
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I can't tell you about the woman thing as I never did that. It never works out when someone is taken advantage of they never come back. dealers get premium prices for the work they get it just doesn't sound right as to what is wrong with this car.
Jun 6, 2013 at 12:51 PM