how to determine group size?

[Wingsfreak9 10+ year member]

how do I figure out the group size of the battery under my hood. I have a supercharged 2007 grand prix gt

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[Kross6622 10+ year member]

its a group 34, i work at a battery shop plus I own an 07 grand prix

 

[sacsking916 5,000+ posts]

yup group 34. you can tell usually by the bci number on the top of the battery