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1990 gmc g2500 5.7 vacuum hose missing



there are 2 vacuum hoses on one side of the tps mount 1 hose on the other side and one hose on the front,the front hose and the right side hose go to the tbi,the top of the 2 left side hoses goes to the egr valve,I am missing the bottom left side hose,I need to know where the other end of it goes ,so I can measure the distance and auto parts can cut a hose to fit.the dealer has no vacuum hose diagram available due to the age of the vehicle.

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