I used the test port when i put one in my 01 silvy. I know i couldve switched clusters but rather not mess with the odometer.
I know it wasnt accurate but basically showed me while towing when it was getting hot and cooling down
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2001 Trans Am WS6 •SLP Loudmouth II •UMI Suspension •12.857 @ 109.57
1996 Trans Am WS6 •Pacesetter Longtubes •Strange 12 Bolt •Spohn Suspension •11.152 @ 123.85
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