According to this info the T10 should use 80wt lube...
https://www.gmheritagecenter.com/docs/gm-heritage-archive/vehicle-information-kits/Corvette/1988-Chevrolet-Corvette.pdf
The 2005 C6 has the exact same column lock as the 2004 C5. WITH all of the same issues. A good battery that meets or exceeds the factory rating is the best way to avoid this problem.
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