CADILLAC ESCALADE HYBRID 2012 Workshop Manual

Black plate (9,1)Cadillac Escalade Hybrid - 2012
Vehicle Care 10-9“ Engine Coolant ” and “ Cooling
System ” in the owner manual for
more information.
When it is safe to lift the hood:
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 Surge 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.

Black plate (10,1)Cadillac Escalade Hybrid - 2012
10-10 Vehicle Care 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.
(Continued) WARNING (Continued) Wait for the cooling system and
coolant surge tank pressure cap
to cool if you ever have to turn
the pressure cap.
Notice: Using coolant other than
a pre ‐ mixed DEX-COOL, available
at your dealer, may damage your
vehicle. Any repairs would not be
covered by your warranty. Always
use a pre ‐ mixed DEX-COOL
(silicate-free) coolant in your
vehicle.
{ WARNING
You can be burned if you spill
coolant on hot engine parts.
Coolant contains ethylene glycol
and it will burn if the engine parts
are hot enough. Do not spill
coolant on a hot engine. If the DMCM coolant is empty, the
vehicle must be serviced by your
dealer and a special fill procedure
must be followed.
Notice: Attempting to fill the
DMCM cooling surge tank
yourself when the fluid level is
empty can damage your vehicle.
Your vehicle must be serviced.
1. Park the vehicle on a level
surface and turn the vehicle off.
Remove the DMCM coolant
surge tank pressure cap when
the DMCM cooling system,
including the DMCM coolant

Black plate (11,1)Cadillac Escalade Hybrid - 2012
Vehicle Care 10-11surge tank pressure cap and
DMCM cooling hoses, are no
longer hot. Turn the DMCM
coolant surge tank pressure cap
slowly counterclockwise (left)
about one full turn. Wait
30 seconds.
2. Then keep turning the DMCM
coolant surge tank pressure cap
slowly, and remove it.
3. Add the pre ‐ mixed DEX ‐ COOL,
available at your dealer, to the
DMCM coolant surge tank until
the level reaches the FULL
COLD mark. 4. Turn the ignition to ON/RUN
without starting the engine. The
hybrid cooling pumps will run
and any trapped air will purge to
the surge tank.
5. Add the pre ‐ mixed DEX ‐ COOL,
available at your dealer, until the
coolant level is maintained at the
FULL COLD mark. This should
take no longer than two minutes
of hybrid cooling pump
operation.
If the level cannot be kept at the
FULL COLD level, the vehicle
may need service. See your
dealer.
6. Then replace the DMCM coolant
surge tank pressure cap. Be
sure the pressure cap is
hand-tight and fully seated. Notice: Using tap water, cooling
system sealers or conditioners in
an attempt to stop coolant leaks
can damage the DMCM and
engine cooling systems. Never
use tap water, cooling system
sealers or conditioners in your
cooling system.
Battery This vehicle has a standard 12 ‐ volt
battery and a high voltage hybrid
battery.
Refer to the replacement number on
the original battery label when a
new standard 12 ‐ volt battery is
needed.
Only a trained service technician
with the proper knowledge and
tools should inspect, test, or replace
the hybrid battery. See your dealer
if the hybrid battery needs service.
The dealer has information on how
to recycle the hybrid battery. There
is also information available at
http://www.recyclemybattery.com.

Black plate (12,1)Cadillac Escalade Hybrid - 2012
10-12 Vehicle Care If an airbag inflates or the vehicle
has been in a crash, the vehicle's
sensing system might command the
automatic hybrid battery disconnect
to open. See Replacing Airbag
System Parts after a Crash on
page 3 ‑ 1 for more information.
{ WARNINGBattery posts, terminals, and
related accessories contain lead
and lead compounds, chemicals
known to the State of California to
cause cancer and reproductive
harm. Wash hands after handling.
Vehicle Storage
{ WARNING
Batteries have acid that can burn
you and gas that can explode.
You can be badly hurt if you are
not careful. See Jump Starting on
(Continued) WARNING (Continued) page 10 ‑ 29 for tips on working
around a battery without
getting hurt.
Infrequent Usage: Remove the
12 ‐ volt battery black, negative ( − )
cable from the battery to keep the
battery from running down.
Extended Storage: Remove the
12 ‐ volt battery black, negative ( − )
cable from the battery or use a
battery trickle charger.
Remember to reconnect the battery
when ready to drive the vehicle.
Four-Wheel Drive Transfer Case
When to Check Lubricant
See “ Scheduled Maintenance ” in the
owner manual to determine how
often to check the lubricant. How to Check Lubricant
Active Transfer Case
A. Fill Plug
B. Drain Plug
To get an accurate reading, the
vehicle should be on a level
surface.
If the level is below the bottom of
the fill plug hole, some lubricant will
need to be added. Add enough
lubricant to raise the level to the
bottom of the fill plug hole. Use care
not to overtighten the plug.

Black plate (13,1)Cadillac Escalade Hybrid - 2012
Vehicle Care 10-13When to Change Lubricant
See “ Scheduled Maintenance ” in the
owner manual to determine how
often to change the lubricant.
What to Use
Refer to the Recommended Fluids
and Lubricants on page 11 ‑ 2 to
determine what kind of lubricant
to use.
Electrical System High Voltage Devices and
Wiring
{ WARNINGExposure to high voltage can
cause shock, burns, and even
death. The high voltage
components in the vehicle can
only be serviced by technicians
with special training.
High voltage components are
identified by labels. Do not
remove, open, take apart,
or modify these components.
High voltage cable or wiring has
orange covering. Do not probe,
tamper with, cut, or modify high
voltage cable or wiring. Fuses and Circuit
Breakers The wiring circuits in the vehicle
are protected from short circuits
by a combination of fuses, circuit
breakers and fusible thermal links.
This greatly reduces the chance of
fires caused by electrical problems.
Be sure you replace a bad fuse with
a new one of the identical size and
rating.
If you ever have a problem on the
road and do not have a spare fuse,
you can borrow one that has the
same amperage. Just pick some
feature of the vehicle that you can
get along without, like the radio or
cigarette lighter, and use its fuse,
if it is the correct amperage.
Replace it as soon as you can.

Black plate (14,1)Cadillac Escalade Hybrid - 2012
10-14 Vehicle Care The vehicle also has a special fuse
in the battery box for the 300-volt
batteries. If this fuse has failed and
needs to be replaced, the vehicle
will be disabled and you will need
to have the vehicle repaired by
your dealer. Do not attempt to
self-service this fuse.
Engine Compartment
Fuse Block Hybrid Auxiliary Engine
Compartment Fuse Block The hybrid auxiliary engine
compartment fuse block is located
in the engine compartment near the
front of the vehicle. Lift the cover for
access to the fuse/relay block. See
Engine Compartment Overview on
page 10 ‑ 4 for more information on
its location. For more information on
the main underhood fuse block, see
“ Engine Compartment Fuse Block ”
in the owner manual. Fuses Usage
1 ACPO (SUV Only)
2 BECM FAN
3 ACCM
4 CAB HTR PMP Fuses Usage
5 EMPTY
6 COOL PUMP
7 EPS

Black plate (15,1)Cadillac Escalade Hybrid - 2012
Vehicle Care 10-15Fuses Usage
8 Drive Motor/Generator
Control Module 1
9 Drive Motor/Generator
Control Module 2
10 BECM
J ‐ Case Usage
FAN 1 Cooling Fan 1
TRANS
PUMP Auxiliary
Transmission
Fluid Pump
FAN 2 Cooling Fan 2 Relays Usage
CAB
HTR
PUMP Cabin Heater Pump
COOL
PUMP Coolant Pump
FAN LO Cooling Fan Low
Speed Relay
FAN
MID 1 Cooling Fan Mid 1 Relays Usage
FAN HI Cooling Fan High
Speed Relay
FAN
MID 2 Cooling Fan Mid 2
FAN
CNTRL Cooling Fan Control

Black plate (16,1)Cadillac Escalade Hybrid - 2012
10-16 Vehicle Care
Wheels and Tires Tire Pressure Tires need the correct amount of air
pressure to operate effectively.
Notice: Neither tire
underinflation nor
overinflation is good.
Underinflated tires, or tires
that do not have enough air,
can result in: .
Tire overloading and
overheating which could
lead to a blowout. .
Premature or
irregular wear. .
Poor handling. .
Reduced fuel economy. Overinflated tires, or tires
that have too much air, can
result in: .
Unusual wear. .
Poor handling. .
Rough ride. .
Needless damage from
road hazards. The Tire and Loading Information
label on the vehicle indicates the
original equipment tires and the
correct cold tire inflation pressures.
The recommended pressure is the
minimum air pressure needed to
support the vehicle's maximum load
carrying capacity.
For additional information regarding
how much weight the vehicle can
carry, and an example of the Tire
and Loading Information label, see
“ Vehicle Load Limits ” in the owner
manual. How the vehicle is loaded
affects vehicle handling and ride comfort. Never load the vehicle with
more weight than it was designed to
carry.
When to Check Check your tires once a month
or more.
How to Check Use a good quality pocket-type
gauge to check tire pressure.
Proper tire inflation cannot be
determined by looking at the tire.
Check the tire inflation pressure
when the tires are cold, meaning
the vehicle has not been driven
for at least three hours or no more
than 1.6 km (1 mi).
Remove the valve cap from the
tire valve stem. Press the tire
gauge firmly onto the valve to get a
pressure measurement. If the cold
tire inflation pressure matches the
recommended pressure on the Tire
and Loading Information label, no
further adjustment is necessary.

Black plate (17,1)Cadillac Escalade Hybrid - 2012
Vehicle Care 10-17If the inflation pressure is low, add
air until the recommended pressure
is reached. If the inflation pressure
is high, press on the metal stem in
the center of the tire valve to
release air.
Re-check the tire pressure with the
tire gauge.
Return the valve caps on the valve
stems to prevent leaks and keep out
dirt and moisture.
Tire Pressure Monitor
Operation This vehicle may have a Tire
Pressure Monitor System (TPMS).
The TPMS is designed to warn the
driver when a low tire pressure
condition exists. TPMS sensors are
mounted onto each tire and wheel
assembly. The TPMS sensors
monitor the air pressure in the tires
and transmit the tire pressure
readings to a receiver located in the
vehicle. When a low tire pressure condition
is detected, the TPMS will illuminate
the low tire pressure warning
symbol located on the instrument
cluster. If the warning light comes
on, stop as soon as possible and
inflate the tires to the recommended
pressure shown on the tire loading
information label. See “ Vehicle Load
Limits ” in the owner manual for
more information.
A message to check the pressure in
a specific tire displays in the Driver
Information Center (DIC). The low
tire pressure warning light and the
DIC warning message come on at
each ignition cycle until the tires
are inflated to the correct inflation pressure. Using the DIC, tire
pressure levels can be viewed. For
additional information and details
about the DIC operation and
displays see Driver Information
Center (DIC) on page 5 ‑ 5 .
The low tire pressure warning light
may come on in cool weather when
the vehicle is first started, and then
turn off as the vehicle is driven. This
could be an early indicator that the
air pressure is getting low and
needs to be inflated to the proper
pressure.
A Tire and Loading Information
label shows the size of the original
equipment tires and the correct
inflation pressure for the tires when
they are cold. See “ Vehicle Load
Limits ” for an example of the Tire
and Loading Information label and
its location. Also see Tire Pressure
on page 10 ‑ 16 .

Black plate (18,1)Cadillac Escalade Hybrid - 2012
10-18 Vehicle Care The TPMS can warn about a
low tire pressure condition but
it does not replace normal tire
maintenance. See “ Tire Inspection, ”
“ Tire Rotation ” and “ Tires ” in the
owner manual for more information.
Notice: Tire sealant materials are
not all the same. A non-approved
tire sealant could damage the
TPMS sensors. TPMS sensor
damage caused by using an
incorrect tire sealant is not
covered by the vehicle
warranty. Always use only
the GM-approved tire sealant
available through your dealer or
included in the vehicle.
Factory-installed Tire Inflator Kits
use a GM approved liquid tire
sealant. Using non-approved tire
sealants could damage the TPMS
sensors. See Tire Sealant and
Compressor Kit on page 10 ‑ 22 for
information regarding the inflator kit
materials and instructions. TPMS Malfunction Light and
Message The TPMS will not function properly
if one or more of the TPMS sensors
are missing or inoperable. When the
system detects a malfunction, the
low tire warning light flashes for
about one minute and then stays on
for the remainder of the ignition
cycle. A DIC warning message also
displays. The malfunction light and
DIC warning message come on at
each ignition cycle until the problem
is corrected. Some of the conditions
that can cause these to come
on are: .
The TPMS sensor matching
process was not done or
not completed successfully
after rotating the tires. The
malfunction light and the DIC
message should go off after
successfully completing the
sensor matching process. See
"TPMS Sensor Matching
Process" later in this section. .
One or more TPMS sensors
are missing or damaged. The
malfunction light and the DIC
message should go off when the
TPMS sensors are installed and
the sensor matching process is
performed successfully. See
your dealer for service. .
Replacement tires or wheels do
not match the original equipment
tires or wheels. Tires and wheels
other than those recommended
could prevent the TPMS from
functioning properly. See
“ Buying New Tires ” in the owner
manual. .
Operating electronic devices or
being near facilities using radio
wave frequencies similar to the
TPMS could cause the TPMS
sensors to malfunction.
If the TPMS is not functioning
properly, it cannot detect or signal a
low tire condition. See your dealer
for service if the TPMS malfunction
light and DIC message comes on
and stays on.