Battery replacement - Chevy and GMC Duramax Diesel Forum

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post #1 of 11 (permalink) Old 11-21-2009, 03:50 PM Thread Starter
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Battery replacement

The batteries in my 06 Sierra will soon be 4 years old. Should I replace them now?
My experiences in the recent past tell me most batteries don't give you much warning (if any) of when they are dying. I don't want to wait til that happens.

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post #2 of 11 (permalink) Old 11-22-2009, 03:16 AM
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if it isnt broke, dont fix it....my truck is an 04 and i have the original batteries in my truck too. Unless you just have money burning a hole in your pocket...go for it or you can send it to my paypal....

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I have heard or people that change the batteries and then the new ones fail later. Either way it is a gamble. Usually you can jump your truck if the battery(s) are bad anyway.

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post #3 of 11 (permalink) Old 11-22-2009, 03:31 AM
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I have also had new batteries that fail within days.

Do both batteries have to be good to start the 6.6 ? or can one be weak/undercharged ?

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post #4 of 11 (permalink) Old 11-22-2009, 03:37 AM
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One can be weak...it just depends on what exactly it goes bad for. sometimes a bad battery will drain the other one down. that is why you're supposed to change them as a set. I am happy with my battery life so far. Especially since my truck has been in alaska the whole time.

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post #5 of 11 (permalink) Old 11-22-2009, 06:24 AM
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If your worried buy a couple Optimas. Can't ever go wrong with them plus they have a warranty. Use to be lifetime, but I think they changed it to 10 years?

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post #6 of 11 (permalink) Old 11-22-2009, 06:31 AM
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They all have warranties..and i have read where people even had problems with new optimas. I'm undecided on what i will buy when mine need replacing....i know it will probably be soon.

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post #7 of 11 (permalink) Old 11-22-2009, 06:40 AM
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do you have to hook up a charger through your lighter when you change the battery??I thought I seen a post a while back on that

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post #8 of 11 (permalink) Old 11-22-2009, 07:06 AM
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I have never heard that

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post #9 of 11 (permalink) Old 11-22-2009, 07:26 AM
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I thought I saw that post also. Something about removing both batteries at the same time and losing the ecm.


I have a 2001 with original batteries, they seem good yet.

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post #10 of 11 (permalink) Old 11-22-2009, 07:44 AM
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that is not true...my truck has been disconnected for 6 months at a time with no issues.

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