Speedometer gone nuts.

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07-26-2010, 09:29 PM

Moonraker_4

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Speedometer gone nuts.

1994 GMC 3500 dully 6.5 with 220,000 miles The speedometer is reading 0-85 mph without truck moving.

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07-27-2010, 05:01 PM

Woody35

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clean all the grounds first

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07-28-2010, 08:17 AM

DieselSlug

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My truck also does it but only goes up to 10 mph. Common chevy thing.

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08-02-2010, 08:25 PM

jdcoop8791

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Mine did that for awhile, but now it is fine, the only thing i can think of it mud or dirt messin it up

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