My speedo was off by under 2 MPH, according to two different GPS units. This is with the 33 inch tires, and still within Fed Regulations.
I have been told there is no recalibration possible by the dealers using a Tech 2, but I have not spent enough time with a Tech 2 to verify this.
Other aftermarket companies might produce a tool that can alter the tables in the computer to adjust for different size tires...not sure.
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Black Sheep Hummer Squadron
(ME TOO)
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