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I just got this 2003 4x4 extended cab chevy silverado with the 6.6 ltr diesel, and I noticed that I dont have any vaccum. On the driver side under hood by firewall there is what looks to be a electric vaccum pump but it is not plugged in and I cant find the plug. This was a Border patrol truck before I got it. I need wiring schamatic and vaccum diagram, I had it painted and the diagram for the vaccum is not on the hood anymore.
