Caution – Hummer 2004 H2 User Manual
Page 340
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Checking Coolant
The coolant surge tank is
located in the engine
compartment on the
passenger’s side of the
vehicle.
See Engine Compartment Overview on page 5-12 for
more information on location.
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CAUTION:
Turning the surge tank pressure cap when the
engine and radiator are hot can allow steam
and scalding liquids to blow out and burn you
badly. Never turn the surge tank pressure
cap — even a little — when the engine and
radiator are hot.
The vehicle must be on a level surface. When your
engine is cold, the coolant level should be at the FULL
COLD mark.
If your vehicle is equipped with the LOW COOLANT
LEVEL message and it comes on and stays on, it means
you’re low on engine coolant.
See “Low Coolant Level” under DIC Warnings and
Messages on page 3-56.
5-26
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