2002 Chevy Silverado Batery not charging

2002 CHEVROLET SILVERADO
160,000 MILES • V8 • 4WD • AUTOMATIC
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VASVAJ
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My 02 chevy silverado is not charging the batery. My batery would slowly drain out while driving. I've replaced the batery with a new one, but still draining. I also have the alternator tested by autozone trice and it passes the test, but it still draining the batery. Sometime it would charge up if I run up the engine once or twice by stepping on the gas hard. Any subjestion on what's wrong?
Jan 13, 2008 at 10:13 AM
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MERLIN2021
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If the alternator tests ok check for a slipping serpentine belt, and bad batter cables, or connections, especially the neg cable to block!
Check the pulley nut, make sure it's tight!
Jan 13, 2008 at 10:17 AM