Battery swap for secondary battery

2011 CHEVROLET AVALANCHE
118,800 MILES • 5.3L • 6 CYL • 2WD • AUTOMATIC
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ROYCAR71
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  • 359 POSTS
Hello, I junked my 1999 GMC Jimmy and took battery. I recently purchased the truck listed above that has empty secondary battery tray. My question is, can I use the battery from the GMC Jimmy into the truck above as secondary with a "battery isolater"?
Nov 30, 2019 at 12:29 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

Yes, you can. Make sure you hook it in parallel.

You can use the isolator but make sure you allow it to get charged at least once a week or you will run the risk of it draining.

Roy
Nov 30, 2019 at 9:48 PM
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ROYCAR71
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  • 359 POSTS
What gauge wire is suitable? Thanks.
Dec 2, 2019 at 12:45 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Use battery cable to connect the positive and negative.

Roy
Dec 2, 2019 at 1:05 PM
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ROYCAR71
  • MEMBER
  • 359 POSTS
Aw, meant size of wire I'll be adding/buying for secondary battery. 2,4, gauge etc.
Dec 2, 2019 at 1:46 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
4 gauge which is the size of standard battery cable.

Roy
Dec 2, 2019 at 1:58 PM
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