Back Fire

By BigDave
February 10, 2005 in 1999-2013 Silverado 1500 & Sierra 1500

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BigDave

Posted February 10, 2005

I have noticed that my 04' 5.3L has been backfiring and I dont why. It has no preformance issues and only backfires when its cold and when the engine is reved between 2000-3000 RPM's, it doesnt do it under load only in N or P. Does anybody now what could be the problem.

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