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Old 07-31-2019, 06:19 PM   #3
ls1nova71
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Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
Re: GPS Speedo Option?

Not sure why your speedo would read 120 at 40? Do you have it hooked up to the correct speedometer output wire? I would think if the PCM thought your MPH was that far off it wouldn't shift right either. Does the needle go to 0 when stopped?
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5.3 swap into my RUSTY '71 C10
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