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2nd battery and isolator for 2010 Avalanche

TriCoatLTZ

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Joined
Jan 12, 2020
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17
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Dallas, Texas
Hey all,

I am looking to put a second battery and isolator in my Avalanche. At my job sites I would like to run an outlet in the back to play a radio, charge tool batteries etc and even use for camping. I have the space and the platform in the front/drivers side of the engine compartment.

Has anyone done this? Thoughts? Part numbers? Pics? I searched the forums and didn't find anything compelling to refer to so hoping for some thoughts and ideas.

Thanks,

TriCoatLTZ
 

BainMan

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Mar 22, 2019
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566
Hey TriCoatLTZ. It's a great idea, and that battery tray makes this a tempting project!

Check out this article for a start. You really just need an isolator, wiring, and a 2nd battery.

The article references this isolator, and you add the wiring:

Here is another option as a full kit

Also, search youtube for full guides, at least several out there. 'Chevy dual battery install' or something like that. You can always change out the 'chevy' in your search for tahoe, suburban, escalade and other GMT900 variants to get different results.
 

Vaeagleav

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Many threads already on this site about adding a second battery in addition to what BainMan has mentioned. I believe many of the AV owners who have done this mod used a "painless wiring kit" in addition to the second battery.
 

TriCoatLTZ

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Jan 12, 2020
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Many threads already on this site about adding a second battery in addition to what BainMan has mentioned. I believe many of the AV owners who have done this mod used a "painless wiring kit" in addition to the second battery.
Great, Ill keep looking. Wish you would have posted a link. I searched "2nd battery" Isolator etc and came up with a big zero.
 

TriCoatLTZ

Full Member
Joined
Jan 12, 2020
Messages
17
Location
Dallas, Texas
Hey TriCoatLTZ. It's a great idea, and that battery tray makes this a tempting project!

Check out this article for a start. You really just need an isolator, wiring, and a 2nd battery.

The article references this isolator, and you add the wiring:

Here is another option as a full kit

Also, search youtube for full guides, at least several out there. 'Chevy dual battery install' or something like that. You can always change out the 'chevy' in your search for tahoe, suburban, escalade and other GMT900 variants to get different results.
Thank you for the info and the detail. Helps a ton.
 

Vaeagleav

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These are just a few links, I found 7 pages of links using word search for painless battery kit.. Hope some of this helps you.
 

avbermudablue

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I added a second battery in my 2005 using the KeyLine isolator last year. It's worked well so far. Here is a link to a video I posted about the installation.
 
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