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How did the OnStar upgrade go? Where does the new module go? No one (not even a dealer) has been able to tell me yet. I'm hoping they don't have to take apart the interior console.And I was told Friday by one dealer that they recommend and use Pennzoil now and if I wanted Mobil 1 for my C7 it would have to be a special order.
How did the OnStar upgrade go? Where does the new module go? No one (not even a dealer) has been able to tell me yet. I'm hoping they don't have to take apart the interior console.
And I was told Friday by one dealer that they recommend and use Pennzoil now and if I wanted Mobil 1 for my C7 it would have to be a special order.
