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Does Chevy make a 10 bolt rear end with 342 gear ratio?

No, GM (Chevrolet's parent company) did not offer a 10-bolt rear axle with a 3.42 gear ratio from the factory in any of their production vehicles. While 10-bolt rear ends were common and offered with various gear ratios, 3.42 wasn't a standard option. You might find a 3.42 ratio in an aftermarket 10-bolt, or possibly in a very rare or custom-built application, but it's not a factory option.