CHEVROLET 2009 Silverado - Manual (Page 51)

When you decide it is safe to lift the hood, here is what
you will see:
A. Drive Motor/
Generator Control
Module (DMCM)
B. Engine Coolant
Surge Tank
Pressure Cap
C. DMCM Coolant
Surge Tank/Engine
Coolant Surge Tank
D. DMCM Cooling
Hoses (Out of View)
E. DMCM Coolant Tank
Pressure Cap
If the coolant inside the DMCM coolant surge tank is
boiling, do not do anything else until it cools down.
The coolant level should be at or above the FULL COLD
mark with the vehicle parked on a level surface. If it is not,
there might be a leak at the DMCM cooler core, DMCM
pressure cap, DMCM cooler hoses, DMCM cooling pump
or somewhere else in the DMCM cooling system.
Notice: Running the engine when there is a leak in
the hybrid cooling system can cause the hybrid
cooling system to lose all coolant and can damage
the system. Get any leak fixed before you drive
the vehicle or run the engine.
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