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Plenum in a 1999 Silverado 2500

Discussion in 'Chevy Truck Talk & GM News' started by bluebrick, Feb 21, 2012.

  1. bluebrick

    bluebrick New Member

    Hope I have not bored everybody with continuing Sea Foam questions, but the instructions for the vortec engines ( I have the 6.0 ) says to insert the 30" straw into the air intake until you reach the plenum and I am sorry to say that I don't even know what the plenum is when I reach it. Help!

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