Question about 1993 GMC Sierra C3500

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I have a 1993 gmc truck starts runs as long as I give it gas if I take my foot off the gas pedal it will stop. Truck was in storage for a while when I first started it it ran and idiled fine then it shut off I changed the filter wires rotor stiil has a problem HELP

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This is a classic example of a throttle position sensor gone bad. GMC products from 1988 on are notorious for this.

Posted on Apr 29, 2010

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