GM Bulletin No.: 14114
Date: June 2014

Service Bulletin

SERVICE UPDATE
SUBJECT:

Service Update for Inventory and Customer Vehicles
RESS Battery Coolant Level Low
Expires with Base Warranty

MODELS:

2012-2013 Chevrolet Volt

This service update includes vehicles in dealer inventory and customer vehicles that return to the
dealership for any reason. This bulletin will expire at the end of the involved vehicle's New Vehicle
Limited Warranty period.
PURPOSE
This bulletin provides a service procedure to check the coolant level, check for any leaks, and fill
the coolant tank to proper height. Certain subject vehicles were built with the coolant volume fill
that was below the specification in the Rechargeable Energy Storage System (RESS). As a result,
after the coolant system purges the air in the coolant loop (which may take up to 12 months), the
remaining coolant level is lower than required. If this were to occur, a DTC may be set with a DIC
message, "Service High Voltage Charging System". If a code is set, the wall charging system will
be inactive until service is performed.
This service procedure should be completed as soon as possible on involved vehicles
currently in dealer inventory and customer vehicles that return to the dealer for any type
of service during the New Vehicle Limited Warranty coverage period.
VEHICLES INVOLVED
All involved vehicles are identified by VIN in the Global Warranty Management System –
Investigate Vehicle History Application. Dealership technicians should always check this site to
confirm vehicle involvement prior to beginning any required inspections and/or repairs. It is
important to routinely use this tool to verify eligibility because not all similar vehicles may be
involved regardless of description or option content.
Additionally, a list of involved vehicles currently in dealer inventory is available on the “Service
Update Bulletin Information” link under the “Service” tab in GM GlobalConnect (US) or attached
to the GlobalConnect message (Canada) used to release this bulletin. Customer vehicles that
return for service, for any reason, and are still covered under the vehicle's base warranty should
also be checked for vehicle eligibility.
Copyright 2014 General Motors. All Rights Reserved.

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June 2014

Bulletin No.: 14114

PART INFORMATION
Parts required to complete this service update are to be obtained from General Motors Customer
Care and Aftersales (GMCC&A). Please refer to your “involved vehicles listing” before ordering
parts. Normal orders should be placed on a DRO = Daily Replenishment Order. In an emergency
situation, parts should be ordered on a CSO = Customer Special Order.
Part Number
12378390 – US
10953456 – CN

Description
GM Pre-Mixed DEXCOOL

Quantity/Vehicle
As Needed (submit
as Net Item)

SERVICE PROCEDURE

3672187

1.

Visually inspect the coolant level in the HV battery surge tank and verify that the coolant
level is at the top of the label (1) on the side of the surge tank.

Caution: If there is a loss of coolant or the coolant level is low, it is critical that the technician
follows the Pressure Test Procedure in this bulletin.
2.

Determine the surge tank coolant level.
 If the HV battery surge tank coolant level is at the top of the label (1) on the side of the
surge tank, no further action is required.
 If the HV battery surge tank coolant level is not at the top of the label (1) on the side of the
surge tank, refer to Pressure Test Procedure in this bulletin.

Pressure Test Procedure
1.

Remove the front compartment front sight shield. Refer to Front Compartment Front Sight
Shield Replacement in SI.

2.

Remove the anti-tamper coolant cap bracket and the coolant cap.

3.

Place a floor jack under the vehicle, and then raise the left front of the vehicle. Refer to
Lifting and Jacking in SI.

4.

Use the EN-24460-A Cooling System Pressure Tester with the GE-46143 Radiator Cap and
Surge Tank Test Adapter in order to apply pressure of 5 psi (34.4 kPa) to the cooling
system. You MUST allow the vehicle to rest during this pressure test time period for a
minimum of 5 minutes.

5.

Raise the vehicle on the hoist. Refer to Lifting and Jacking in SI.

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6.

June 2014

Bulletin No.: 14114

Perform the following service steps:
6.1 Remove the high voltage battery (HV) protective aluminum foil patch located on the
right rear of the battery tray.
6.2 Using a plastic trim tool or an equivalent, remove the butyl tape patch.
6.3 Remove the rubber inspection plug from the Hybrid/EV Battery Pack housing.

7.

Insert a rolled up paper towel into the inspection plug area and twist and turn it in order to
determine if there is any coolant present.


If any coolant is present, then you MUST CALL TAC.



If coolant is not present, then proceed to Step 7.1.

7.1 Install the rubber inspection plug into the Hybrid/EV Battery Pack housing.
7.2 Install the butyl tape patch or new butyl tape if the substance is weather worn.
7.3 Install the protective aluminum foil patch.
8.

Determine if the hybrid HV battery cooling system passes the pressure test.


If the cooling system passes the pressure test, lower the vehicle and refer to Adding
Coolant to the Surge Tank in this bulletin.

Note: Cooling system repairs are not part of this field action bulletin. Submit a claim as warranty
or customer pay as appropriate.


If the cooling system does NOT pass the pressure test, refer to SI to diagnose and
repair the cooling system. Refer to Adding Coolant to the Surge Tank in this bulletin
after performing the cooling system repairs. Submit a warranty claim for the cooling
system repair.

Adding Coolant to the Surge Tank

3672187

Note: Always use GM Pre-mixed DEXCOOL® GM Part No. 12378390 (in Canada P/N
10953456) which is a 50/50 mixture of DEXCOOL® and deionized water. This will eliminate the
possibility of the introduction of non-deionized water that is used in some aftermarket premixed
coolants. DO NOT use 100 percent DEXCOOL® and add ordinary tap water or distilled water.
Doing so may cause unwanted DTCs.
1.

Adjust the surge tank coolant level to the top of the label (1). Refer to Drive Motor Battery
Cooling System Draining and Filling — Removing Excess Coolant From System in SI.

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June 2014

Bulletin No.: 14114

2.

Install the coolant cap and the anti-tamper coolant cap bracket. Refer to Coolant Cap
Bracket Replacement in SI.

3.

Install the front compartment front sight shield. Refer to Front Compartment Front Sight
Shield Replacement in SI.

WARRANTY TRANSACTION INFORMATION
Submit a transaction using the table below. All transactions should be submitted as a ZFAT
transaction type, unless noted otherwise.
Labor
Code
9100567
9100568
*

Description
Inspect Surge Tank Coolant Level – No Further Action Req'd
Inspect Surge Tank Coolant Level & Add Coolant (inc.
pressure check)

Labor
Time
0.2
0.6

Net
Item
N/A
*

The amount identified in “Net Item” should represent the actual sum total of the current
GMCC&A Dealer net price for DEXCOOL needed to perform the required repairs, not to
exceed $1.57 USD, $2.15 CAD, plus applicable Mark-Up or Landed Cost (for Export).

DEALER PROGRAM RESPONSIBILITY
Whenever a vehicle subject to this service update enters your vehicle inventory, or is in your facility
for service in the future, and the vehicle is still covered under the New Vehicle Limited Warranty,
you must take the steps necessary to be sure the service update correction has been made before
selling or releasing the vehicle.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that
may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the tools,
equipment, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to
your vehicle, or that your vehicle will have that condition. See your dealer for information on whether your vehicle may benefit from the information.

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