Once you've added some distinction to your Hummer with oversized tires, rims or rear end modifications, speedometer and odometer readings can spin out of control. Hummer H3 speedometer calibrators put you back in charge, with precise readings. An H3 speedometer calibrator simply plugs into your computer to assess and adjust readings and keep your speedometer honest.
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That's not all your Hummer H3 calibrator does, it can also improve transmission precision. These H3 calibrators are always up to date with the latest software and codes, since you can plug them into your computer. Hummer H3 speedometer calibrators might even step up your MPG!
Hummer H3 Speedometer Calibrators are Available for the Following Trims & Body Styles: