Safety Warning
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.
2007 Hummer H3Coolant Type & Capacity
OEM spec from the factory service manual for the Automatic variant.
Quick Answer
Coolant Type
50/50 mixture of DEX-COOL and drinkable water
Capacity
10.00 QTS.
9.46 L
Variant
Automatic
This vehicle's factory manual
2007 Hummer H3: confirm the engine, trim, or drivetrain to open the available repair and diagnosis sections.
Other specs:All specs
What You'll Need
Related for Your 2007 Hummer H3
Quick Actions
Frequently Asked Questions
- What type of coolant does a 2007 Hummer H3 take?
- The 2007 Hummer H3 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 Automatic configuration.
- How much coolant does a 2007 Hummer H3 hold?
- The 2007 Hummer H3 cooling system capacity is 10.00 QTS. (9.46 L).
- Can I use universal coolant in my 2007 Hummer H3?
- 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 2007 Hummer H3?
- 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.