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Old 10-07-2014, 09:25 PM   #1
slam59
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Join Date: Nov 2011
Location: So. Calif
Posts: 305
What should voltage reading be while driving?

77 3/4 ton with 454. It is usually in the center at 14 but drove it to work today and noticed on way to work and on way home it was like 12 or so at the most. Put new battery 2 months ago. Possibly alternator getting weak?
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1974 C10 swb 350

1977 3/4 ton Silverado 454

1999 2 door 2wd Tahoe
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