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2002-2009 GMC Envoy battery group size

The exact BCI group size your Envoy takes — the code that decides which battery physically fits and reaches the cables. Cross-checked against the automaker's own chart and a retailer finder so you buy the right one the first time.

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Battery group size

78Flooded lead-acid2 sources

Verified · cross-checked against 2 independent sources · Jun 2026

OE minimum CCA

≥ 600

Choose at least this — never a verified figure

A battery is bought by its group size. Shop Group 78 batteries that physically fit — double-check the group printed on the battery against your car before you buy.

Find a Group 78 battery on Amazon
Where this came from
  • Interstate Batteries 2023 Application Guide (BCI/Clarios feed — retailer finder, one witness) — source“Gmc • Envoy 2009-05 V8/5.3L 78 600”
  • GM Genuine Parts catalog (parts.gmparts.com), genuine "ACDelco Gold 42 Month Warranty High Reserve BCI Group 78 Battery" product page, "Fits these vehicles" GMC tab — source“Envoy 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009”

The group size carries our verified badge only when the automaker's own battery chart and an independent retailer finder agree on it — two genuinely separate sources, never two resellers of the same data. CCA is shown as an OE minimum, a “choose at least this” floor, never a verified number, because the right CCA is a property of the battery you pick. Your owner's manual is always the final word.