Thread: GPS / Clock not working after battery disconnect

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  1. #1 GPS / Clock not working after battery disconnect 
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    I have a 2006 Grand Prix GXP and replaced the battery (the same issue has been noted in similar year Corvettes - same system) and noticed that my clock was not on as well as the GPS not connecting with the satellite. On the Corvette forum, I found a post that stated :
    "The military made a change to the GPS signal on or about 12/13/18. It impacted C6 Corvettes up to the 2010 models for sure. The firmware in the radio will need to be updated one GM has the fix. I opened a ticket with GM and suggest everyone that that this same issue do the same. To avoid the problem you can insert a feature saver into you cigarette lighter when you change the car battery. Otherwise you will not be able to set the time until the software is fixed."

    Has anyone else seen this in their system and is there a fix for the problem? I am pretty sure that a feature saver was used when my battery was replaced (all radio channels still there), but the problem still occurred.
    Thank you in advance for any assistance.
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  3. #2 Re: GPS / Clock not working after battery disconnect 
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    Just wanted to follow up with more information that I learned today. There is a GM document, PIT5652E (Document ID: 5355382), that states engineers are aware of the situation if you have the GPS system RPO of U3U, U3Z, URB, US4 or YQ4 (our option was the US4). In speaking with Pontiac Customer Service, they were awful and not worth the time (not much better with Chevrolet Customer Service either). Yeah, I spoke with both. Also, there is no process to escalate the issue, only customer service rep. These reports are reviewed by their supervisor only. I asked how they know if 20,000 owners are having this problem as it affects Cadillac, Chevrolet, GMC, Hummer, Pontiac and Saab potentially and she did not have a clue. What a way to hide issues. Now having no GPS, I guess that I will have to use my cell phone to guide me...…..WAIT! That is against the law in Nevada to use your cell phone while driving.
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