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Need some mechanical advice folks. I drive an 09 trailblazer and my battery was dead today. I'm not sure if it's the battery or the alternator. I bought it second hand a year ago, so I'm not sure how old the battery is. It took a lot of charging to get it to jump. After a half hour of letting it run, driving it 5 miles, then shutting it off, it won't turn over. Doesn't even make an attempt actually. The lights flickered and the radio crackled when traction control kicked on. It has been humming while accelerating, had it checked out, not tires or wheel bearings.Just had to replace the serpentine belt as well. My money is on the alternator but can anybody help me diagnose this? Will I have to replace the battery as well?
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>>1167949
You can test the battery at all national auto parts, for FREE
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Had the same issue with my Jeep, check your battery terminals. One of mine was bad and this was the source of the issue.
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>>1167949
As someone who wasted the better part of a weekend assuring myself that no, the battery is only a year old, it can't be the battery.... it's probably the battery.
Test/replace the simplest, cheapest things first, even if you're SURE they are fine. Because you're not sure.
1. Clean terminals
2. Replace negative battery cable
3. Replace battery
4. Cry
5. Alternator
6. Sell car to a woman and hope she doesn't have a boyfriend that knows cars
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>>1167949
>09 trailblazer
set it on fire
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Same symptoms on my 97 hardbody with an old ass battery. Turned out to be a bad terminal connection. Cheap and easy fix.
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