Checking And Adding Coolant - GMC Hummer H3 2008 Owner's Handbook Manual

Problems on the Road
CAUTION
Do not run the engine if there is
a leak. All the coolant could leak
out and cause an engine fire.
You could be burnt.
NOTICE
Running your engine without
coolant could cause engine
damage that wouldn't be
covered by your warranty.
If the coolant is leaking, have it
fixed immediately.
If the coolant is not leaking, start
the engine again.
To check the operation of the fan,
press the accelerator pedal. Fan
speed should increase as the idle
speed is doubled. If it does not, the
vehicle needs service.
Turn off the engine.
. . . 306
Checking and Adding
Coolant
The coolant level can be checked
by looking at the see-through
recovery reservoir without having
to remove the cap.
The vehicle must be on a level
surface.
The level should be at or above the
FULL COLD mark.
If the coolant level is low, add a
50/50 mixture of water and DEX-
®
COOL coolant to bring the level
to the proper mark.
See "Engine Coolant" in Section 4.
CAUTION
Adding only plain water or a
liquid other than the recom-
mended coolant can be
dangerous. The engine could
overheat, but you would not
get the overheat warning. The
engine could catch on fire and
you or others could be burnt.