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DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2009 Hummer H3tCoolant Type & Capacity
OEM spec from the factory service manual for the Alpha variant.
Quick Answer
Coolant Type
50/50 mixture of DEX-COOL and drinkable water
Capacity
14.30 QTS.
13.53 L
Variant
Alpha
This vehicle's factory manual
2009 Hummer H3t: confirm the engine, trim, or drivetrain to open the available repair and diagnosis sections.
Other specs:All specs
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Frequently Asked Questions
- What type of coolant does a 2009 Hummer H3t take?
- The 2009 Hummer H3t requires 50/50 mixture of DEX-COOL and drinkable water. The exact spec may vary slightly by engine variant — this page shows the OEM recommendation for the Alpha configuration.
- How much coolant does a 2009 Hummer H3t hold?
- The 2009 Hummer H3t cooling system capacity is 14.30 QTS. (13.53 L).
- Can I use universal coolant in my 2009 Hummer H3t?
- It is strongly recommended to use coolant that meets the 50/50 mixture of DEX-COOL and drinkable water specification. Universal coolants may not provide the correct corrosion protection for your engine's materials.
- What happens if I use the wrong coolant in my 2009 Hummer H3t?
- Using coolant that does not meet the OEM specification can cause corrosion, gasket damage, and overheating. Always verify the correct coolant type before topping off or flushing the system.