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Old 02-26-2008, 06:59 PM   #1 (permalink)
Green Machine
EcoModding Lurker
Join Date: Jan 2008
Posts: 14

Green Machine - '05 Chevrolet Aveo
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What to believe (ScanGauge & GPS vs. speedometer)

My GPS and my SG II agree on my speed. The speedometer shows about 3-4 mph lower than both. I tend to think the GPS and SG are more likely to be correct. What does the group think??

I believe the SG and the speedo are getting the same info from the computer. I think maybe the actual speedo needle isn't very calibrated. The trip odometer is accurate to within 1/10 mile for every 100 miles driven.


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