Want to add the secondary battery like PPV

[JJB809]

Hello, my regular Tahoe Premier 2017 is always sucking a battery dry in a year. 7 years 7 batteries. Dealership says nothing wrong. All tests come out correct. Looking to add the secondary battery and even a larger alternator. I added the Whipple 3.0 supercharger , kooks catted headers and car runs strange. Even had to modify firewall since the system was “made “ for exact fit but it was not.
Any recommendations for extra battery. Extra wiring. Bigger alternator?
32,000 miles. Any better plugs and cables? Thanks friends!!

 

[tritron]

Decommissioned Tahoe PPV: Auxiliary Battery and Its Usage

Most Tahoe PPVs come with auxiliary battery option (Pro Code 6A6, 5W4 or 9C1), which is part of PPV package. Based on GM published electric circuit schematic, auxiliary battery only supplies power to police add-on electric gears which will be installed by an aftermarket upfitter before Tahoe...

www.tahoeyukonforum.com

 

[Doubeleive]

Hello, my regular Tahoe Premier 2017 is always sucking a battery dry in a year. 7 years 7 batteries. Dealership says nothing wrong. All tests come out correct. Looking to add the secondary battery and even a larger alternator. I added the Whipple 3.0 supercharger , kooks catted headers and car runs strange. Even had to modify firewall since the system was “made “ for exact fit but it was not.
Any recommendations for extra battery. Extra wiring. Bigger alternator?
32,000 miles. Any better plugs and cables? Thanks friends!!

make or purchase a ground wire to run from 2nd battery to 1st battery (attach both together)
buy or make a power wire from 2nd battery to starter, (attach to starter along with 1st battery starter cable)
buy a battery hold down and bolt for 2nd battery (tray should already be present)
battery hold down is the same one gm has always used on full size vehicles.
this creates a simple basic parallel battery setup.

 

[tritron]

There is base plate

Driver Side Battery Auxiliary Tray 22989633 For 14-20 Chevy Silverado 2500 HD | eBay

60328, 22989633. For 2015-2020 Chevrolet Silverado 2500 HD. For 2015-2020 Chevrolet Silverado 3500 HD. For 2014-2019 Chevrolet Silverado 1500. For 2015-2020 GMC Sierra 2500 HD. 1 Battery Tray. For 2015-2020 GMC Sierra 3500 HD.

www.ebay.com