What is the vacume switch called that operates the EGR valve

1993 CHEVROLET CHEYENNE
14,680 MILES
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LITTLELOU
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C1500 with 4.3 engin
May 11, 2012 at 7:46 PM
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DOCFIXIT
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EGR solenoid
May 11, 2012 at 7:52 PM
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WRENCHTECH
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Some call it an EVR (EGR Valve Regulator)
May 11, 2012 at 10:32 PM
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