What could be wrong if I have went through 1 battery per 1.5 yrs in my 2003 Denali and diagnostics say that my alternator is fine?

Asked by DBoy Aug 27, 2010 at 08:55 AM about the 2003 GMC Yukon Denali AWD

Question type: Maintenance & Repair

Mine is NOT the XL

1 Answer

295

Depends, u may do a lot of short runs which dont charge the battery up, u may live in a cold area which hurts the cells or you may be putting the wrong battery or a low quality battery in, some cheaper batteries only last around 2 years. Alarms can cause problems for sure if its not a factory fitted one and drain the battery or something is wired wrong or shorting taking charge from it when the car is off.

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