2003 Chevrolet Suburban Battery Runs Down Every Night Got Starter Alternator

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my battery runs down every night! i got my starter,alternator,and battery checked three times they say its okay. what could it be.
Oct 20, 2012 at 3:23 PM
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SATURNTECH9
  • ✓Experienced Mechanic
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I have seen batteries test good and still self discharge themselves but you have to first see if there is a draw.You can use a multimeter that will do milliamp draw or they have more expensive parasitic load testers.
Oct 20, 2012 at 5:08 PM
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