
I used this to recalibrate my 2009 Jeep Grand Cherokee (WK) after a 2" lift and 32" tires. Be sure to follow the instructions to turn off all accessories (fans, lights) and then pull out the stereo fuse. Worked like a charm and I had a perfectly calibrated speedometer in about 5 minutes. My only complaint is that it can only be used on one vehicle at a time.

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