1987 GMC Van V8 Two Wheel Drive Automatic 166000 miles
My 1987 VanDura slowly lost electrical power while driving and eventually would not run. Started with a jump but did not run very long as the same thing happened. Alternator? I charged the battery overnight and started the van. I checked the alt. Output which was 16.0 and rose to 20.0 in about 10 minutes. I shut the engine off at that point.