Page 56 of 98
Black plate (8,1)Chevrolet Tahoe and GMC Yukon/Yukon Denali Hybrid - 2011
10-8 Vehicle Care
Hot Check Procedure
Use this procedure to check the
transmission fluid level when the
transmission fluid temperature is
between 60°C and 75°C (140°F
and 167°F).
The hot check is the most accurate
method to check the fluid level. The
hot check should be performed at
the first opportunity in order to verify
the cold check. The fluid level rises
as fluid temperature increases, so
it is important to ensure the
transmission temperature is within
range.
1. Locate the transmission dipstickat the rear of the engine
compartment, on the passenger
side of the vehicle. See
Engine Compartment
Overview on page 10‑4 for more
information.
2. Pull out the dipstick and wipe it with a clean rag or paper towel.
3. Install the dipstick by pushing it back in all the way, wait
three seconds, and then pull it
back out again.
4. Check both sides of the dipstick and read the lower level. Repeat
the check procedure to verify the
reading.
5. Safe operating level is within theHOT cross hatch band on the
dipstick. If the fluid level is not
within the HOT band, and the
transmission temperature is
between 60°C and 75°C (140°F
and 167°F), add or drain fluid as necessary to bring the level into
the HOT band. 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.
Page 58 of 98
Black plate (10,1)Chevrolet Tahoe and GMC Yukon/Yukon Denali Hybrid - 2011
10-10 Vehicle Care
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.
How to Add Coolant to the
DMCM Coolant Surge Tank
If no problem has been found yet,
check to see if coolant is visible in
the DMCM coolant surge tank. If coolant is visible, add pre‐mixed
DEX-COOL coolant, available at
your dealer, at the DMCM coolant
surge tank, but be sure the DMCM
cooling system, including the DMCM
coolant surge tank pressure cap, is
cool before you do it. Use the
procedure following.
{WARNING
Steam and scalding liquids from a
hot cooling system can blow out
and burn you badly. They are
under pressure, and if you turn
the coolant surge tank pressure
cap
—even a little —they can
come out at high speed. Never
turn the cap when the cooling
system, including the coolant
surge tank pressure cap, is hot.
Wait for the cooling system and
coolant surge tank pressure cap
to cool if you ever have to turn
the pressure cap.
Page 82 of 98
Black plate (34,1)Chevrolet Tahoe and GMC Yukon/Yukon Denali Hybrid - 2011
10-34 Vehicle Care
5. The remote negative (−) is asolid engine ground.
{WARNING
An electric fan can start up even
when the engine is not running
and can injure you. Keep hands,
clothing and tools away from any
underhood electric fan.
{WARNING
Using an open flame near a
battery can cause battery gas to
explode. People have been hurt
doing this, and some have been
blinded. Use a flashlight if you
need more light.
Be sure the battery has enough
water. You do not need to add
water to the battery installed in
your new vehicle. But if a battery
has filler caps, be sure the right
(Continued)
WARNING (Continued)
amount of fluid is there. If it is low,
add water to take care of that
first. If you do not, explosive gas
could be present.
Battery fluid contains acid that
can burn you. Do not get it on
you. If you accidentally get it in
your eyes or on your skin, flush
the place with water and get
medical help immediately.
{WARNING
Fans or other moving engine
parts can injure you badly. Keep
your hands away from moving
parts once the engine is running.
6. Check that the jumper cables do not have loose or missing
insulation. If they do, you could
get a shock. The vehicles could
be damaged too. Before you connect the cables,
here are some basic things you
should know. Positive (+) goes to
positive (+) or to a remote
positive (+) terminal if the vehicle
has one. Negative (−) will go to a
heavy, unpainted metal engine
part or a solid engine ground.
Do not connect positive (+) to
negative (−) or you will get a
short that would damage the
battery and maybe other parts
too. Do not connect the
negative (−) cable to the
negative (−) terminal on the dead
battery because this can cause
sparks.
7. Connect the red positive (+) cable to the positive (+) terminal
of the vehicle with the dead
battery. Use a remote
positive (+) if the vehicle
has one.
Page 92 of 98
Black plate (2,1)Chevrolet Tahoe and GMC Yukon/Yukon Denali Hybrid - 2011
12-2 Technical Data
Vehicle Data
Capacities and Specifications
ApplicationCapacities
Metric English
Automatic Transmission* (Pan Removal and Filter
Replacement) 10.9 L 11.5 qt
Cooling System Drive Motor Generator Control Module Cooling System 2.7 L 2.9 qt
6.0L V8 Engine Cooling System 17.3 L 18.3 qt
Fuel Tank 92.7 L 24.5 gal
*Transmission fluid capacity is approximate. See Automatic Transmission Fluid on page 10‑6for information on
checking fluid level.
All capacities are approximate. Recheck fluid level after filling.
