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Q:

Every time the key is turned on, the Fuel pump,pvc/cvm fuse blow. Why? on 1998 GMC Yukon

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Before I bought it a month ago, it had sat for 3yrs. I need to be sure it's the Fuel pump before I spend my money. Coil and distributor are good. No loose plugs or anything.
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Unplug the fuel pump wire connector and see if it still blows the fuse!!!... IF not... Replace the pump 'module'..! IF it still blows the fuse continue search for short to ground... GOOD LUCK!