1982 GMC Van



January, 27, 2010 AT 4:49 AM

Electrical problem
1982 GMC Van V8 Two Wheel Drive Automatic 72700 miles

I have a class c motorhome. Bolted on the left valve cover is what looks like a relay. The only numbers I can get off of it is 477322 on top and at the bottom is 2156. Didn't know what this does or if is should be replaced?

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