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The Chevrolet Silverado is a line of trucks under the Chevrolet brand and manufactured by General Motors. Mechanically, the GMC Sierra and Chevrolet Silverado are identical.

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Stuck on High RPMs

I recently cleaned my 2008 Chevrolet Silverado 1500 4x4 throttle body and now it's stuck on high RPMs any solution to how I could fix this?

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Its either a Vacuum Leak, Bad Fuse, or a Faulty Air Control Valve

I see the Air Control Valve being the culprit on older cars because of high carbon buildup over time, giving you an P0505 Error Code. Speaking of error codes, did you use a Scan tool on the truck? If so, could you post the results here?

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