Tach

By AB7TW
September 17, 2008 in 1999-2013 Silverado 1500 & Sierra 1500

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AB7TW

Posted September 17, 2008

04 GNC serria 4.8 4x4 ext cab. at idle tach shows 4000 when truck is shut off the tach needle will not go down no codes. if i take ground cable off batt the tack goes to zero then works ok till next time some times weeks. any ideas

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