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Hummer H3 coolant capacity

Total cooling-system coolant capacity for the Hummer H3, by generation and engine, in quarts and liters.

Shop GM DEX-COOL Amazon · coolant for 2008-2010 models
Which coolant the Hummer H3 takes
YearsCoolantBuy
2008-2010GM DEX-COOL (orange)Shop
2005-2006GM DEX-COOL (orange)Shop

Sources: GM 2003 Hummer H2 Owner's Manual, Penray, DEX-COOL frequently asked questions (archived copy). Shop links go to Amazon, and we may earn a commission at no extra cost to you.

Hummer H3 2008-2010
EngineCapacityLiters
5.3 V814.3 qt13.5 L

See the 2008 H3 →

Hummer H3 2006
EngineCapacityLiters
3.510 qt9.5 L

See the 2006 H3 →

Hummer H3 2005
EngineCapacityLiters
3.510 qt9.5 L
5.3 V814.3 qt13.5 L

See the 2005 H3 →

Capacity is the full cold-fill for the whole system. Top up to the marked level and use the coolant type specified in your owner's manual. Source.