Engine Overheating - Cadillac XT6 Owner's Manual

Cadillac XT6 Owner Manual (GMNA-Localizing-MidEast-14574703) - 2021 -
CRC - 7/16/20
inside the coolant surge tank may
be lower. If the level is lower, add
more of the proper mixture to the
coolant surge tank until the level
reaches the mark pointed to on the
front of the coolant surge tank.
5. Replace the pressure cap tightly.
6. Verify coolant level after the engine
is shut off and the coolant is cold.
If necessary, repeat coolant fill
procedure Steps 1 6.
Automatic Coolant Service Fill
Instructions (2.0L Engine Only)
If equipped, this feature assists in
filling and removing air from the
cooling system after service of
components or when coolant is added
after being too low.
To activate the fill and air removal
process:
1. With a cold system, disconnect the
vent line from the port near the
cap on the surge tank. Add coolant
to the indicated mark on the
surge tank.
2. Reconnect the vent line to the
surge tank and replace the cap on
the surge tank.
3. Connect the vehicle to a battery
charger.
4. Put the vehicle in Service Mode.
See Ignition Positions 0 216.
5. Turn off the air conditioning.
6. Set the parking brake.
VEHICLE CARE
7. At the same time, press the
accelerator and the brake for
automatic transmission vehicles for
two seconds, then release.
At the end of the cycle, check the
coolant level in the surge tank and
add coolant, if it is low. Turn off the
vehicle, allow the Engine Control
Module (ECM) to go to sleep, about
two minutes, and repeat steps 3-7.
Listen for pump activation and
movement of the control valves while
watching the level of the tank. If the
tank empties, turn the ignition off,
carefully remove the surge tank cap,
refill to the indicated mark and repeat
steps 3-6. The fill and air removal
process will run for approximately
10 minutes.

Engine Overheating

The vehicle has several indicators to
warn of the engine overheating.
There is an engine coolant
temperature gauge and an engine
coolant temperature warning light on
the instrument cluster. See Engine
Coolant Temperature Gauge 0 109 and
297