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TrailblazerSS
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when idling cold or warm there sounds like a valve tap or knocking sound coming from the engine. anyone have suggestions to fix this?
 

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The Lurker
TrailblazerSS 06
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when idling cold or warm there sounds like a valve tap or knocking sound coming from the engine. anyone have suggestions to fix this?
Does it go away?
 

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TrailblazerSS
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post a video so it could be heard if you can.
 
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