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2008 Pontiac Grand Prix Battery Size

The 2008 Pontiac Grand Prix uses a BCI Group 85 battery (Group 34 also fits), rated about 575-650 cold cranking amps (Flooded).

BCI Group Size85also fits Group 34The case-size code that sets the physical fit and terminal layout.Verified fit
Battery type (OEM)
Flooded
Cold cranking amps (CCA)
575-650
Terminal position
Standard-terminal layout
Dimensions (L×W×H)
230×173×203 mm
Location
Under the hood (engine bay)

Side-terminal 85 std; AGM trims use 34. Always confirm against your owner's manual or current battery label.

Verified fitLast checked
Sources: CarSpecs
It comes with a standard flooded battery. You can usually step up to an AGM in the same Group 85 for longer life, but it isn't required. A 575-650 CCA rating is typical for this class. Matching or slightly exceeding the OEM figure is fine; going below it risks hard starts in winter. Group 85 defines the case size and terminal layout (standard-terminal layout), so any reputable Group 85 battery will fit the tray and connect correctly. Some trims or engines use Group 34 instead, so always confirm against the label on your current battery.

Where to buy a Group 85 battery

A car battery is heavy and expensive to ship, so buying in person (Walmart, Costco, or a local auto-parts store) often beats online once you count free installation and the core-charge refund on your old battery. To compare prices and reviews online:

Search Group 85 batteries on Amazon575+ CCA, Flooded

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.

Frequently asked

What size battery does a 2008 Pontiac Grand Prix take?

The 2008 Pontiac Grand Prix uses a BCI Group 85 battery (Group 34 also fits), rated around 575-650 cold cranking amps.

Does the 2008 Pontiac Grand Prix need an AGM battery?

No - it comes with a flooded battery from the factory. You can usually upgrade to AGM in the same Group 85 size, but it isn't required.

How many cold cranking amps (CCA) does it need?

Aim for roughly 575-650 CCA. Choosing at or above the OEM rating is fine; going below can cause hard starts in cold weather.

Where is the battery located?

Under the hood (engine bay). Standard-terminal layout.

Other vehicles that use Group 85

See all cars that take a Group 85 battery →
2007 Pontiac Grand Prix2006 Pontiac Grand Prix2005 Pontiac Grand Prix2004 Pontiac Grand Prix

Also check the wiper sizes for your 2008 Pontiac Grand Prix →