klw Posted April 27, 2009 Share Posted April 27, 2009 I have a puzzling speedometer question that I am hoping someone can answer. I have a 1996 Chevy 4wd pickup. I have had a gps unit in the pickup for at least 3 years and the speedometer has always been pretty accurate. For some reason recently the speedometer has become off by 8-10 mph. I have made no mechanical changes of any sort. I checked it with a different gps with the same results. Anyone have an idea what would cause this or how to fix it? Quote Link to comment Share on other sites More sharing options...
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