Bully Dog 40300 PMT advanced vehicle downloader, controller, monitor and gauge - Manual (Page 41)

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CALIBRATING THE OEM SPEEDOMETER (GM 6.6L)
Program in the vehicle’s exact tire size to adjust the OEM speedometer so that it will correctly display vehicle
speeds. The downloader can adjust for tires ranging from 25” to 45”.
Note that adjusting the tire size over 35” may result in an ABS light turning on in the vehicle dash.
CALIBRATE SPEEDOMETER
Using the Up/Down Arrows
Enter Tire diameter
in inches -33.25”
Press Yes to Accept
Yes
Agree
Disagree
CALIBRATE SPEEDOMETER
Do you want to adjust
for Tire Size? -Y/N
DO NOT UNPLUG
YES
NO
OPERATING INSTRuCTIONS
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