Chevrolet C6H042 Owner's Manual page 195

Cooling System
R
(Caterpillar Diesel Engine)
When you decide it's safe to lift the hood, here's what
you'll see:
A. Engine Fan
B. Coolant Surge Tank
5-28
If the coolant inside the coolant surge tank is boiling,
don't do anything else until it cools down.
R
Caterpillar
Diesel Engine
The coolant level
should be at COLD
ADD or higher. If it
isn't, you may have a
leak in the radiator
hoses, heater hoses,
radiator, water pump
or somewhere else in
the cooling system.