Chevrolet/GMC 3.0L Duramax Diesel Engine Supplement (GMNA-Localizing-
U.S./Canada-13336148) - 2020 - CRC - 9/5/19
46
Vehicle Care
To activate the fill and air removal
process:
1. With a cold system, add
coolant to the indicated mark
on the surge tank.
2. Turn the ignition on.
3. Turn off the air conditioning.
4. Set the parking brake.
5. At the same time, press the
accelerator and the brake for
two seconds, then release.
6. Start the vehicle within five to
10 seconds.
7. Idle the engine for
three minutes while adding
fluid as the level drops below
the indicated mark on the
surge tank.
8. Replace the cap and run the
engine at 2500 rpm for
10 minutes while watching the
coolant temperature gauge to
be sure the temperature has
risen but is not overheating.
If the temperature has not risen
or is overheating, return to idle
and shut off the engine. Allow
the engine to completely cool
down and add coolant.
9. Allow the system to completely
cool down and check the level
of coolant in the surge tank. If it
is low, add fluid to the indicated
mark and repeat Steps 3
–
9.
Cooling System
(Turbocharger)
The cooling system allows the
Charge Air Cooling System to
maintain the correct working
temperature.
1. Engine Cooling Fan (Out
of View)
2. Engine Coolant Surge Tank
and Pressure Cap
3. Charge Air Coolant Surge
Tank and Pressure Cap
{
Warning
An underhood electric fan can
start up even when the engine is
not running and can cause injury.
Keep hands, clothing, and tools
away from any underhood
electric fan.
{
Warning
Do not touch heater or radiator
hoses, or other engine parts.
They can be very hot and can
burn you. Do not run the engine if
there is a leak; all coolant could
leak out. That could cause an
engine fire and can burn you. Fix
any leak before driving the
vehicle.
