duramax battery specs?

[FirstAscent]

I have a 2020 Silverado 3500 duramax, so with the dual batteries. I'm trying to find out what the stock specs are on them without removing any brackets/covers etc. I know there are multiple replacement options, but I'm just curious as to what they come with from the factory. 

 

I called the dealer and all they could tell me was that it was (for both main and auxiliary): 

Group 48 size 

730 CCA

 

Anyone know what the Ah (Amp Hour) rating is on them from the factory?

 

 

[redwngr]

Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power
1 -  Included and only available with (L8T) 6.6L V8 gas engine.

 

Battery, heavy-duty dual 730 cold-cranking amps/70 Amp-hr, maintenance-free with rundown protection and retained accessory power
1 -  Included and only available with (L5P) Duramax 6.6L Turbo-Diesel V8 engine.

 

K4B         Battery, auxiliary, 730 cold-cranking amps/70 Amp-hr
1 -  Requires (L8T) 6.6L V8 gas engine and either (KW5) 220-amp alternator or (KHF) dual alternators. Not available with (KW7) 170-amp alternator.

[FirstAscent]

Battery, heavy-duty 720 cold-cranking amps/80 Amp-hr, maintenance-free with rundown protection and retained accessory power
1 -  Included and only available with (L8T) 6.6L V8 gas engine.
 
Battery, heavy-duty dual 730 cold-cranking amps/70 Amp-hr, maintenance-free with rundown protection and retained accessory power
1 -  Included and only available with (L5P) Duramax 6.6L Turbo-Diesel V8 engine.
 
K4B         Battery, auxiliary, 730 cold-cranking amps/70 Amp-hr
1 -  Requires (L8T) 6.6L V8 gas engine and either (KW5) 220-amp alternator or (KHF) dual alternators. Not available with (KW7) 170-amp alternator.

Perfect thank you! Exactly what I was looking for