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I have a 1989 GMC 3500 with custom plow attachment. The box where the controls connect to the hydraulic system is leaking fluid, and I think is getting worse. I don't even know what this component is called, so would like to start there. It looks like a connection is leaking - where a hose...

I inherited a 1989 GMC 3500 and two driveways besides my own to plow. I keep doing this (4th winter now) as the money earned from plowing keeps the old truck running. I am mechanically inclined, but NOT experienced in many aspects of repairing. I hate to keep calling on my late husband's...