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Q:

rough idle , stalls out .No trouble codes. replaced fuel filter,& PCV valve. on 1999 Chevrolet Silverado 1500

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rough idle ,stalls out .no trouble codes.replaced fuel filter & PCV valve.
(1) Answer
you need testing to find out why. fuel pressure, spark, compression and others. you need a good shop that can track it down and give you an accurate bid

Roy