File in Section:

Service Bulletin

Bulletin No.:
Date:

PIT4821C
March, 2013

PRELIMINARY INFORMATION
Subject:

(Hybrid) High Voltage 2-Mode Battery Parts Restriction-TAC

Models:

2009-2013 Cadillac Escalade
2008 - 2013 Chevrolet Tahoe and GMC Yukon Hybrid
2009-2013 Chevrolet Silverado and GMC Sierra Hybrid
All with Two-Mode Hybrid System (RPO HP2)

This PI was superseded to update core return process and recommended field. Please
discard PIT4821B.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern
The purpose of this bulletin is to explain the 2-Mode Drive Motor Generator Battery parts restriction program for the
models listed above. The drive motor generator battery assembly is referred to as the hybrid battery. Product teams
continually seek valuable information for engineering improvements. To assist in this effort, a hybrid battery parts
restriction program will be used for this product. The servicing technician must provide detailed customer comments,
conditions, diagnostic trouble codes (DTCs) and other useful information (as described in the procedures below)
prior to requesting a 2-Mode Drive Motor Generator Battery from TAC.

SAFETY PRECAUTIONS
Caution: To reduce the risk of severe shock and burns, treat all high voltage cables and connectors as though they
are energized until it can be verified. Any service to the hybrid system or any related component requires the
removal of the key from the ignition. If the key is left in the Run position, failure to remove the key from the ignition
could cause the engine to auto-start, and in the Off position, the 300V system could remain active. The first step of
disabling the high-voltage system is to remove the key from the ignition, which is designed to open the contactors in
the battery pack, beginning the process of powering down the high-voltage system.
Caution: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or
connection. Personal Protection Equipment (PPE) and proper procedures must be followed. Refer to High Voltage
System Diagnosis/Disabling in SI.
Danger: Failure to follow the procedures exactly as written may result in serious injury or death. Diagnosis
and repair of Two-mode propulsion systems, 2-Mode high voltage systems, M99 Transmission, LFA and LZ1
engines, regenerative brake apply systems and HVAC systems MUST be performed by dealers who both sell
and service 2-Mode Tahoe and Yukon vehicles. Dealers must have the essential tools and personal
protective equipment and technicians performing hybrid repairs must have completed all available training
prior to proceeding with repairs on the unique hybrid components. If your dealership is not a 2-Mode Hybrid
sales and servicing dealership with a trained technician, then the vehicle must be transferred to a dealership
that meets these requirements.

PRELIMINARY PROCEDURES
Disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling in SI.
The High Voltage Disabling procedure will perform the following tasks:
• Identify how to disable high voltage.
• Identify how to test for the presence of high voltage.
• Identify condition under which high voltage is always present and personal protection equipment (PPE) and
proper procedures must be followed.

PARTS RESTRICTION PROCEDURE
Follow the recommendations below prior to contacting TAC to verify that proper diagnosis has been performed.
Upon review of the diagnosis, TAC will establish a case reference number, and if necessary, make arrangements for
ordering a hybrid battery assembly.
Important: The Hybrid battery assembly can now be internally serviced, however the high-voltage disconnect lever
(one of the more commonly damaged/replaced items) is available separately and can be ordered by the dealership
parts department. The hybrid battery assembly does not come with a new disconnect lever.
Notice: If the battery is being ordered for a non-warrantable concern (i.e. collision, theft, fire, flood, etc.) a valid VIN
and proof of ownership are required.

Recommendation/Instructions
1. A thorough diagnosis by a trained 2-Mode Hybrid Technician must be performed in order to prevent
unnecessary component replacements.
Refer to "Diagnostic System Check-Vehicle with HP2" in SI to identify the correct procedure for diagnosing the
system.
2. If DTCs are present and the procedure gives direction to remove internal components; STOP, capture snapshot
stored data, test drive the vehicle with the Tech·2® installed in order to capture a snapshot of the BECM data
during the drive cycle or when a symptom occurs. See the latest version of 07-07-30-010 for snapshot data
collection and PIP4686 for drive cycle and charge procedure instruction.
3. If DTCs are not present, refer to Symptoms Hybrid Energy Storage in SI.
4. If any diagnostic procedure gives direction to remove internal components follow current published SI
procedures.
5. Contact TAC (U.S.) 1-877-446-8227 or 1-800-263-7740 in Canada for English and 1-800-263-7960 for French)
to review case details.
6. After reviewing the diagnosis, if battery replacement is needed, TAC will arrange for ordering of a new battery.
7. Follow procedures for disabling high voltage systems in SI.
8. After verifying that the high voltage systems are disabled, remove the hybrid battery assembly per SI
procedures.
9. For proper battery return shipping and storage guidelines please follow the core return process described
below. DO NOT RETURN THE BATTERY TO THE WARRANTY PARTS CENTER.
10. Once the battery has been replaced, perform SPS Sequential Programming (SEQ) in TIS. This will program the
Drive Motor Generator Battery Control Module (BECM) as well as check and reprogram all hybrid control
modules in the sequence with the latest calibrations. If the calibration is already current the module will be
“skipped” in the programming sequence.
11. Drive the vehicle for at least 1 hour to verify concern has been resolved.

CORE RETURN PROCESS
Please be advised, effective October 1, 2009 GM Parts will impose a $1000 ($1500 in Canada) core charge on
two-mode hybrid battery assembly part numbers 19180442 and 19117171. USA dealers please reference CC&A
Process GMP09-215 – Introduction of GM Parts 2-Mode Hybrid Battery Assembly Core Return Process available in
Global Connect. Dealers in Canada should reference Core Returns in Section 7 - Returns and Claims, of the GMCL
Parts Policies and Procedures Manual. For any core issue, please contact Focus Hope Enterprises at
1-877-888-1220.
In the event the HV Battery needs to be recycled, refer to the webpage "General Motors Recycle My Battery” http://
recyclemybattery.com/ for the latest information.

SHIPPING PREPARATION
1. Disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling in SI.
2. Remove the high voltage battery from the vehicle as outlined in Drive Motor Generator Battery Replacement
in SI.
3. Cover all exposed high voltage openings with UL® listed, or equivalent, insulation tape rated at a minimum of
600 volts.
4. Tighten any fasteners that were loosened or removed during high voltage battery removal to the original torque
specification.
5. Remove any plastic shipping plugs or covers from the new unit and install them on the high voltage battery to be
returned.
6. Attach non-spillable label, provided with the new battery, to the top of the failed battery assembly (These
non-spillable batteries are exempt from DOT hazardous materials regulations when shipping by ground
transportation).
7. Write the TAC case reference number on the hybrid battery assembly in a visible location.

8. Place the hybrid battery core into double polyethylene bags.
9. Write the TAC case reference number on the repair order.
10. Place the high voltage battery core into the shipping container and attach the completed return shipping tag to
the high voltage battery.
Important: The failed hybrid battery assembly must be placed in two (double) polyethylene bags that were provided
with the new battery. This double bagging procedure must be performed as soon as the battery is removed from the
vehicle. After bagging the hybrid battery, place the part in the original shipping container. Hybrid batteries are not to
be shipped or returned until all protective covers, which are shipped with the new battery, are installed and double
bagged. If the bags were misplaced or discarded, they can be obtained from www.uline.com in bulk. The part
number for the bags is S-11050.

SHIPPING INSTRUCTIONS
For GM Dealers in the USA to receive core credit, the battery assembly must be returned using the Heavy Core
Return Process (CC&A Process GMP09-003.) See your Parts Manager for more information as needed. For further
direction please reference CC&A Process GMP09-215 – Introduction of GM Parts 2-Mode Hybrid Battery Assembly
Core Return Process in Global Connect. For GM dealers in Canada, please reference Core Returns in Section 7 Returns and Claims, of the GMCL Parts Policies and Procedures Manual.

STORAGE GUIDELINES
Caution: The high voltage (HV) battery must be protected when outside of the vehicle. Failure to follow these
guidelines may result in serious injury or death.
• Store the HV battery flat, do not exceed 45 degrees when handling.
• Store the HV battery in an environmentally protected area.
• Store the HV battery in a limited access area.
• Maintain the HV battery at room temperature.
• Protect the HV battery from exposure to liquids.
• Protect the HV battery from physical damage.

Parts Information
Year

Make

Model

Part Description

Part Number

2008 - 2013

Chevrolet GMC

Tahoe Yukon

Battery Kit, Drive Motor

19180442

2009 -2013

Cadillac

Escalade

Battery Kit, Drive Motor

19180442

2009 -2013

Chevrolet GMC

Silverado Sierra

Battery Kit, Drive Motor

19117171

Warranty Information
For vehicles repaired under warranty use:
Labor Code

Description

Labor Time

N5823

Drive Motor Generator Battery Replacement

Use Published Labor
Operation Time

Add

Administrative Allowance

.2 Hours

Add

Road Test - Tech2 Snapshot

.3 Hours

Complete the feedback form before performing the high voltage disabling procedure and removing the drive motor
generator battery. Using a scan tool where appropriate, record the following information/data from the BECM data
lists prior to contacting TAC.
Hybrid Battery Part Restriction Worksheet A
TAC Case #

VIN #

Hybrid Battery Part Restriction Worksheet A

Drive Motor Generator Battery Serial #

List All DTC Numbers:

List all Symptoms:

Notice: Multiple Tech 2® Screen prints containing the following information will be accepted in lieu of completing the
table below. The information below can be found in the BECM and Voltage Data Menus on the Tech 2®.
Hybrid Battery Part Restriction Worksheet B
Scan Tool Parameter

Value Displayed

Units Displayed

Control Module Voltage

____________________

volts

Hybrid Battery SOC

____________________

%

Hybrid Battery Part Restriction Worksheet B
Hybrid Battery Pack Calculated

____________________

volts

HVIC Return Current

____________________

mA

HVIC Source Current

____________________

mA

Hybrid Battery 1

____________________

volts

Hybrid Battery 2

____________________

volts

Hybrid Battery 3

____________________

volts

Hybrid Battery 4

____________________

volts

Hybrid Battery 5

____________________

volts

Hybrid Battery 6

____________________

volts

Hybrid Battery 7

____________________

volts

Hybrid Battery 8

____________________

volts

Hybrid Battery 9

____________________

volts

Hybrid Battery 10

____________________

volts

Hybrid Battery 11

____________________

volts

Hybrid Battery 12

____________________

volts

Hybrid Battery 13

____________________

volts

Hybrid Battery Part Restriction Worksheet B
Hybrid Battery 14

____________________

volts

Hybrid Battery 15

____________________

volts

Hybrid Battery 16

____________________

volts

Hybrid Battery 17

____________________

volts

Hybrid Battery 18

____________________

volts

Hybrid Battery 19

____________________

volts

Hybrid Battery 20

____________________

volts

Hybrid Battery Inlet Air Temperature

____________________

*C

Hybrid Battery Outlet Air Temperature

____________________

*C

Hybrid Battery Mod 1 Temperature

____________________

*C

Hybrid Battery Mod 2 Temperature

____________________

*C

Hybrid Battery Mod 3 Temperature

____________________

*C

Hybrid Battery Mod 4 Temperature

____________________

*C

Hybrid Battery Charge Power

____________________

Watts

Hybrid Battery Discharge

____________________

Watts

Calculate Hybrid Battery Resistance

____________________

Ohms

Hybrid Battery Part Restriction Worksheet B

Contactor System Status

____________________

_________________

ADDITIONAL SI KEYWORDS:
07-06-03-008 AIT3232 delete PIP4686 PIT4821 PIT4821A PIT4821B PIT4821C P061B P0BBD
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is
resolved without completing every step, the remaining steps do not need to be performed.