Silverado, Sierra & Fullsize Pick-ups The Silverado & Sierra have been two of the best selling trucks in the US for decades, and is truly proven to be "like a rock".

2014 Chevy Silverado

Platform: Truck, GMT 400, 800, & 900

Po121

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Nov 16, 2013 | 11:03 AM

dcoperator

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Joined: Mar 2007

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Po121

I've got a 2008 Silverado 1/2 ton with a PO121 code showing...(Pedal position sensor) Anyone deal with this code before?

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