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High idle after trip on 2001 Silverado


pwall

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My buddy's 2001 Silverado (5.3l Z71) will idle at 1000rpm after a long trip (>2 hrs or more).

It only does this after a trip. If it's just a short run it's doesn't idle at 1000, but around 750rpm. If he turns off the truck for a couple minutes and restarts, it will return to normal.

Any thoughts?

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