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99 Chevy silverado 4.8l it idles fine until you drive it then it idles up to 15-1700 rpm and wont stop till you shut it down then when i start it again it idles normally until i drive again why?
Wiki User
∙ 13y ago
Probably a bad idle air control valve.
Wiki User
∙ 13y ago
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How many gallons of gas does a chevy silverado hold?
Need to know the year and what size truck you have. You will need to ask your question again with that info. THANK YOU.
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Need more information, Engine size would help. You will need to ask your question again.
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