Caution – Hummer 2004 H2 User Manual
Page 346
How to Add Coolant to the Coolant
Surge Tank
If you haven’t found a problem yet, check to see if
coolant is visible in the surge tank. If coolant is visible
but the coolant level isn’t at or above the FULL
COLD mark, add a 50/50 mixture of clean, drinkable
water and DEX-COOL
®
coolant at the coolant
surge tank, but be sure the cooling system, including
the coolant surge tank pressure cap, is cool before you
do it. See Engine Coolant on page 5-24 for more
information.
If no coolant is visible in the surge tank, add coolant as
follows:
{
CAUTION:
Steam and scalding liquids from a hot cooling
system can blow out and burn you badly. They
are under pressure, and if you turn the radiator
pressure cap — even a little — they can
CAUTION:
(Continued)
CAUTION:
(Continued)
comeout at high speed. Never turn the cap
when the cooling system, including the
radiator pressure cap, is hot. Wait for the
cooling system and radiator pressure cap to
cool if you ever have to turn the pressure cap.
5-32