Black plate (9,1)
Chevrolet Tahoe and GMC Yukon/Yukon Denali Hybrid - 2012
Vehicle Care
10-9
If the fluid level is low, add only
enough fluid to bring the level
into the HOT band. It does not
take much fluid, generally less
than 0.5 Liter (1 Pint). Do not
overfill.
6. If the fluid level is in the
acceptable range, push the
dipstick back in all the way.
Consistency of Readings
Always check the fluid level at
least twice using the procedure
described previously. Consistency
(repeatable readings) is important
to maintaining proper fluid level.
If readings are still inconsistent,
contact your dealer.
Drive Motor/Generator
Control Module (DMCM)
Coolant Surge Tank
Pressure Cap
See
for more information
on location.
The Drive Motor/Generator Control
Module (DMCM) coolant surge tank
pressure cap must be fully installed
on the hybrid coolant surge tank.
Notice:
If the pressure cap is
not tightly installed, coolant loss
and possible damage to the
Drive Motor/Generator Control
Module (DMCM) may occur.
Be sure the cap is properly and
tightly secured.
Drive Motor/Generator
Control Module (DMCM)
Cooling System
In addition to the regular cooling
system, the vehicle also has a
cooling system for the DMCM
system. This system is serviced
differently than the vehicle's main
cooling system. The DMCM cooling
system includes the DMCM coolant
surge tank, DMCM surge tank
pressure cap, DMCM cooling
pumps, hybrid cooling radiator and
the Drive Motor/Generator Control
Module (DMCM). The DMCM
cooling system uses a 50/50
pre-mixed DEX-COOL
®
coolant and
deionized water available at your
dealer. See
“
Engine Coolant
”
and
“
Cooling System
”
in the owner
manual for more information.
