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Adding engine coolant (also known as antifreeze) to your 2009 Hummer H3 is pretty easy. Engine coolant circulates through your engine to keep it cool in the summer but won't freeze in the winter. Make sure to check your engine when it is cold for an accurate reading. The video above shows you where the coolant reservoir in your H3 is located and how to add coolant. Be sure to check your owners manual to determine the correct type of fluid to add - for Hummers, it will typically be in a section titled Fluid Capacities in the back of your manual. Mix the coolant with distilled water so that you have a combination of 50% coolant and 50% water. Some coolants will come premixed...that is, you don't need to add any water. These coolants will typically say 50/50 or pre-mixed on the front of the coolant bottle.
Removing the coolant reservoir cap on a warm engine could cause the cap to fly off at a high rate of speed and fluid to spray out of the reservoir. Always wear safety goggles when working on your H3. Promptly wipe up any spilled fluid as it is highly toxic. Animals love its sweet taste, so even a spilling a small amount on your garage floor can end up in the dog's stomach pretty quickly. If you notice an oily surface in your coolant, immediately have your mechanic inspect your H3 for head gasket leakage
If your transmission is running low on fluid, be sure to add some - find out how to do this here!
2009 Hummer H3 3.7L 5 Cyl.
Carmakers are hiding interior fuse boxes all over the place these days - see how to check your interior fuses here!
2009 Hummer H3 3.7L 5 Cyl.
Is the clock in your car ahead or behind? Learn how to set it here!
2009 Hummer H3 3.7L 5 Cyl.
Transmissions that leak fluid usually have never been flushed and the seal is finally leaking. The right stop leak product can cure a lot
2009 Hummer H3 3.7L 5 Cyl.
If you have an electrical component that doesn't work, try replacing the fuse first
2009 Hummer H3 3.7L 5 Cyl.
