Battery Suggestions

[NASTY GM]

Go with a good one. I put two of these under my back seat.

 

[avalonandl]

i foind the location of the battery is close to the curved body brace so use duct tape over the terminals when installing the new battery....then remove once battery is strapped down....

 

[Tozan]

I installed two of the largest batteries that would fit into my battery compartments last time I replaced my battery.

 

[asand]

Your battery did it's job and was telling you it was getting tired. It didn't strand your wife, you did! LOL

Walmart is out of batteries because they are changing skus and prices are doubling, an $88 battery for the Montana Saturday night was now $125 or so on Sunday. We went to O'Reilly's and put an $88 ACDelco battery in it instead. I can't imagine that car last another 18 months! But then again, I thought we'd only have her another year, 6 years ago!

Anyhow, the 42 month ACDelco 48PG is $166.99 at O'Reilly's right now and the 48HPG is $173.99. The latter has a higher reserve capacity (15 more minutes) and a little more than 6 amp hours more juice in it.

I think it great that you got 7 years out of any battery. Down here in Florida we were lucky to get two years out of them before RVC was put into the cars. My last 30 month ACDelco battery went 48 months, 48K miles and 1700 hours. It was replaced with a 48HPG last Christmas.

The charging systems in the 900s were not programmed to handle AGM batteries and judging by the comments on this and other forums, they do not last as long as they could have because, if memory serves, they like to be re-charged at a faster rate. This may be why GM uses 220 amp alternators now. ACDelco makes AGMs too, but they are not listed as compatible with our trucks though plenty of folks use them without issue.

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I wonder if an alternator upgrade would help charge agm batteries? I imagine it wouldn't be plug and play anyway.

 

[Geotrash]

I wonder if an alternator upgrade would help charge agm batteries? I imagine it wouldn't be plug and play anyway.

This has been my experience. With the OEM alternators I had new AGM batteries fail in both trucks in less than a year. With this alternator installed in both trucks now, I'm on year 5 in one and year 4 in the other - both AGM batteries of the same brand and size that previously failed. It's a datapoint of 2, but I'm 50K miles in and no more problems.

 

[donjetman]

I wonder if an alternator upgrade would help charge agm batteries? I imagine it wouldn't be plug and play anyway.

Yes,
and
all things being equal, AGM batteries charge faster (less resistance) than wet cell batts.