2009 GMC Yukon SLT Electrical Issues

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Peaches

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You need to replace your battery cables. That fixed the going dead issue for me. GM will charge you close to $300 to do it though. Also check to make sure the bolts to the fuse box on the firewall behind your battery is tightened.

Unfortunately, after I got the random dying to stop, new issues arose that are just really annoying.

And they also tried to tell me it was a "communication issue" while insinuating that my phone was interfering with processes. ********. Start with the battery, if it's not fairly new, switch it. If the problems still keep happening, check the cables and the fuse box. My cables were, purportedly, corded through the center. Either way, that did fix the random shutting off, air only blowing on one side, complete electrical shut downs, limp mode, etc.
 

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