I don't reccomend bypassing that. GM did that for a reason. When that lock is on, your rear axle is locked solid. When that thing is locked solid, something has to give when the rear tires are not spinning at exactly the same speed, and the faster you go the more likely is that it will break something in the rear axle. And if you bypass it and break something, you can forget about warranty covering it. I haven't experienced a time yet in which you need it above 20mph.
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