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Old 09-03-2013, 12:16 PM   #4
slick rick
SoCal Mayhem
 
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Drives: 2010 Camaro 1SS/RS
Join Date: Aug 2008
Location: Foothill Ranch, CA
Posts: 5,463
Probably need to figure out where the vacuum line gets it's main connection and then reprogram the ECM or BCM depending which one actually controls the NPP.

From the NPP in a box instructions, there's an unused vacuum port on the back of the LS3 intake manifold.
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