LeadfootDuramax

iTrader: (6)

Was doing a little digging because my battery died. When the battery died several years ago I just replaced it with the size that was in (3585). In doing some digging, it appears a 34 is the correct size. the 34 is physically larger than a 35 or 85.

I want to replace my battery with the correct size (and the group 34 are more amps/CCA). I am a little skeptical that it will fit. Is 34 indeed the correct battery size that came in the GXP's?

I know people move batteries to the trunk and such. Right now I am strictly trying to find out the correct original battery size. The owners manual does not list it.

91parkave

iTrader: (4)

Your local parts store will have that info on hand. I went for a maximum cc CCA RA that I could get

LeadfootDuramax

iTrader: (6)

Depending on where I looked, I got conflicting info. After taking a tape measure back out, I am very doubtful a 34 will fit. I am just going to get another 3585. They have the exact battery I want in stock in that size, it fits, etc.

spawne32

iTrader: (2)

get yourself one of these, makes life easier

rottonj

iTrader: (4)

Don't listen to spawne, he goes small on everything . My red top is a group 35 and I think that was a factory replacement size. Any bigger and that ****** wont fit anyway.

spawne32

iTrader: (2)

ohhhhh i see what you did there, thats a ***** joke.

rottonj

iTrader: (4)

Well it was actually an exhaust joke, get your mind out of the gutter .

Cocor

iTrader: (1)

I got my XS D3400 to fit. Took some slight modifications to the fender well. GM was retarded thinking a 550cca battery could hold up on a V8.

spawne32

iTrader: (2)

what exactly does a v8 have to do with the cold cranking amps? im running a smaller battery in my car from factory, never had any issues

S2KIWI

This should help.

The original AC-Delco which HSV fits to the Holden VE/Opel Omega chassis down here aka your G8 GXP. This was from a late '08 donor.

CCA 710 so an earlier comment was probably on the money. Maybe not so much for cranking but more to run the plethora of electronics on these higher spec HSVs.

Bonus shot of a pre-war stationary diesel engine flywheel in the background

rottonj

iTrader: (4)

Showing a G8 battery isn't apples to apples, that thing isn't even in the engine compartment.