File in Section:

Service Bulletin

Bulletin No.:
Date:

PI1250A
November, 2014

PRELIMINARY INFORMATION
Subject:

Vehicle Health Management (VHM) Service Launch

Models:

2015 Chevrolet Equinox
2015 GMC Terrain
Equipped with V6, 3.6L Engine, SIDI, DOHC, VVT, E85 MAX, ALUM — RPO LFX
Vehicles Enrolled in OnStar® Vehicle Diagnostics — United States and Canada Only

Attention: The Vehicle Health Management (VHM) Service was developed using Genuine GM
components. Due to the wide variation and availability of non-GM components, it is
possible that using non-GM components may set false Service Messages. To maintain
System performance, it is recommended to service these systems using Genuine GM
components.
This PI has been revised to update the Subject by changing “VHM Program Launch” to “VHM
Service Launch” and to update the information. Please discard PI1250.

VHM System Description
VHM Overview
Customers that purchase a 2015 Chevrolet Equinox and/or a 2015 GMC Terrain vehicle that is equipped with the V6,
3.6L engine — RPO LFX and are enrolled in OnStar® Vehicle Diagnostics, will be able to enroll in the new VHM
Service. The VHM Service monitors the Engine Cranking system and the Fuel Delivery system and if either one of
these monitored systems triggers certain performance issues, a Service Message is sent to the U.S. Customer
Assistance Center (CAC), or in Canada the Customer Care Centre (CCC), so that they may contact the customer to
assist them in scheduling a service appointment.
The Engine Cranking system and the Fuel Delivery system components that are monitored are explained as follows:
• Engine Cranking System: Consisting of Battery and Starter and their performance.
• Fuel Delivery System: Consisting of the Fuel Tank Fuel Pump Module and the Fuel Pressure Sensor, located
in the fuel feed pipe and their performance.
Important: It is important to understand that some VHM Service Messages may be generated without any
apparent symptoms being noticed by the Customer.
Service Message Identifier
Currently, there are nine different repair actions covered under the VHM Service. The individual repairs are identified
using a Service Message Identifier, which can be used as a key word when searching SI. They are constructed by
using the involved service manual section, to create a three letter acronym that is combined with three numerals for
a total length of 6 characters. For example: 12 volt battery is covered under the “Starting and Charging” section,
resulting in SAC for the first three positions with three numerals for the last three positions. The first battery Service
Message Identifier is called out as SAC001.
Important: VHM Service Messages are not stored On-Vehicle and cannot be retrieved from the vehicle with
a scan tool by using the normal DTC check. For this initial VHM Service launch, Service Messages are only
included in the communications as outlined in the Subsection titled: Communication Process for Customer
and Dealer. Although some other on board system DTCs may also be set, it is critical that the Service
Technician uses the Service Message Identifier when diagnosing. This is accomplished by identifying and
following the appropriate Service Message Identifier diagnostic procedure in the Section titled: Service
Message Identifiers and Diagnostic Procedures

Warranty
Due to the unique nature of the VHM System, special Bulletin Only Labor Operations have been set up to be used in
conjunction with the repair of the identified Service Messages. The Service Personnel and Warranty Personnel
MUST use these Bulletin Only Labor Operations for ANY repair related to these Service Messages. Refer to the
applicable Bulletin Only Labor Operation identified in the last Step of each Service Message Identifier and also in the
Section titled: Warranty Information, at the end of this Bulletin.
Also, all parts replaced under this program will be requested back through the Warranty Parts Center (WPC). Ensure
that all components are appropriately marked and tracked for return.
Communication Process for Customer and Dealer
When a VHM Service Message is triggered, a Service Message is generated and the U.S. CAC, or in Canada the
CCC will contact the vehicle Customer to set up an appointment with their preferred service provider. CAC or CCC
then contacts the preferred service provider to assist with the service appointment and communication of the VHM
Service Message to ensure proper serviceability. Duplicate Service Message information is also sent to both the
Customer and the preferred service provider by e-mail.
Notice:
• In the United States, if a Customer contacts your dealership about a VHM Service Message by the CAC
and the Service Message information is not clear, call the Dealer Business Center (DBC) Aftersales,
Monday – Friday, 8 am – 9 pm EST at: 888-414-6322, prompt 3, with the involved VIN, and ask to speak to
a Dealer Business Center agent. They will be able to provide the Service Message information in order
for the Service Department Personnel to proceed in the appropriate diagnostic direction.
• In Canada , if a Customer contacts your dealership about a VHM Service Message by the CCC and the
Service Message information is not clear, call the CCC Monday – Friday 8 am – 11 pm EST at the CCC
Dealer Line: 800-561-4515 with the involved VIN, and ask to speak to a Vehicle Health Management
Specialist. They will be able to provide the VHM Service Message information in order for the Service
Department Personnel to proceed in the appropriate diagnostic direction.

Service Message Identifiers and Diagnostic Procedures
Review the Service Message Identifier in the Service Message provided by the Customer or by the CAC, in Canada,
the CCC and begin diagnosis and repair by referring to the appropriate Service Message Identifier in this Diagnostic
Procedures section.
Service Message Identifier SAC001
Predicted Starting and Charging — Battery — Low Cranking Capacity Due to Shorted Cell
1. This Service Message DOES NOT require any diagnosis.
2. Replace the battery. DO NOT use the EL-50313 Midtronics GR8 Battery Tester/Charger. Refer to Battery
Replacement in SI.
3. No other action is required as the Service Message will automatically clear once the battery is replaced and the
vehicle is operated over a number of ignition cycles. Other on board DTCs may have set if the vehicle
experienced a low voltage condition.
Use the scan tool to clear ALL DTCs prior to releasing the vehicle to the Customer.
Notice: The battery warranty code is not required when using this Bulletin Only Labor Operation.
4. Submit the correct Bulletin Only Labor Operation for this repair: 4080568*.
Service Message Identifier SAC002
Predicted Starting and Charging — Low Cranking Capability Due to High Resistance
Notice: The Service Technician MUST complete every Step of this diagnostic.
1. Verify that both battery cable connections are clean and tight. Refer to Battery Inspection/Test in SI.
2. Ignition OFF, measure the battery voltage at the C1 battery terminals. The voltage should be between 12.0–
15.0 V
⇒ If not within the specified range, refer to Battery Charging in SI.
⇒ If within the specified range, Go to Step 3.
3. Test for less than 0.5 V between the positive battery cable and terminal A X2 at the M64 starter motor as the
ignition is placed to the CRANK position.
⇒ If greater than the specified value, replace the positive battery cable.
⇒ If less than the specified value, Go to Step 4.
4. Test for less than 0.5 V between the negative battery cable and the M64 starter motor case as the ignition switch
is placed to the CRANK position.
⇒ If greater than the specified value, replace the negative battery cable. Refer to Battery Negative Cable
Replacement (LFX) in SI.

⇒ If less than the specified value, replace the battery. DO NOT use the EL-50313 Midtronics GR8 Battery
Tester/Charger. Refer to Battery Replacement in SI.
5. No other action is required as the Service Message will automatically clear once the battery is serviced properly
and the vehicle is operated over a number of ignition cycles. Other on board DTCs may have set if the vehicle
experienced a low voltage condition.
Use the scan tool to clear ALL DTCs prior to releasing the vehicle to the Customer.
6. Submit the correct Bulletin Only Labor Operation for this repair: 4080578*.
Service Message Identifier SAC003
Predicted Starting and Charging — Battery — Low Cranking Capability Due to Low State of Charge
Notice: Normal operation of the vehicle MAY have recharged the battery.
1. Follow the instructions in SI for Battery Inspection/Test and Battery Charging using the EL-50313 Midtronics
GR8 Battery Tester/Charger.
2. Perform the Battery Electrical Drain/Parasitic Load Test in order to verify the cause of the low battery, such as
aftermarket equipment, Customer driving habits, etc. Refer to SI.
3. No other action is required as the Service Message will automatically clear once the battery is charged properly
and the vehicle is operated over a number of ignition cycles. Other on board DTCs may have set if the vehicle
experienced a low voltage condition.
Use the scan tool to clear ALL DTCs prior to releasing the vehicle to the Customer.
4. Submit the correct Bulletin Only Labor Operation for this repair: 4080588*.
Service Message Identifier SAC004
Predicted Starting and Charging — Low Cranking Capability Due to High Resistance in Starter System
Notice: The Service Technician MUST complete every Step of this diagnostic.
1. Verify that both battery cable connections are clean and tight. Refer to Battery Inspection/Test in SI.
2. Turn OFF the ignition. Measure the battery voltage at the C1 battery terminals. The voltage should be between
12.0–15.0 V
⇒ If not within the specified range, refer to Battery Charging in SI.
⇒ If within the specified range, Go to Step 3.
3. Test for less than 0.5 V between the positive battery cable and terminal A X2 at the M64 starter motor as the
ignition is placed to the CRANK position.
⇒ If greater than the specified value, replace the positive battery cable.
⇒ If less than the specified value, Go to Step 4.
4. Test for less than 0.5 V between the negative battery cable and the M64 starter motor case as the ignition switch
is placed to the CRANK position.
⇒ If greater than the specified value, replace the negative battery cable. Refer to Battery Negative Cable
Replacement in SI.
⇒ If less than specified value replace the Starter. Refer to Starter Replacement in SI.
5. No other action is required as the Service Message will automatically clear once the starting system is serviced
properly and the vehicle is operated over a number of ignition cycles. Other on board DTCs may have set if the
vehicle experienced a low voltage condition.
Use the scan tool to clear ALL DTCs prior to releasing the vehicle to the Customer.
6. Submit the correct Bulletin Only Labor Operation for this repair: 4080598*.
Service Message Identifier SAC005
Predicted Starting and Charging — System Performance — Low Cranking Capability Due to High Resistance
in Battery or Short in Starter
Notice: Complete every Step of this diagnostic.
1. Verify that both battery cable connections are clean and tight. Refer to Battery Inspection/Test in SI.
2. Turn OFF the ignition. Measure the battery voltage at the C1 battery terminals. The voltage should be between
12.0–15.0 V.
⇒ If not within the specified range, refer to Battery Charging in SI.
⇒ If within the specified range, Go to Step 3.
3. Test for less than 0.5 V between the positive battery cable and terminal A X2 at the M64 starter motor as the
ignition is placed to the CRANK position.
⇒ If greater than the specified value, replace the positive battery cable.
⇒ If less than the specified value, Go to Step 4.

4. Test for less than 0.5 V between the negative battery cable and the M64 starter motor case as the ignition switch
is placed to the CRANK position.
⇒ If greater than the specified value, replace the negative battery cable. Refer to Battery Negative Cable
Replacement in SI.
⇒ If less than specified value, Go to Step 5.
5. Perform a battery inspection/test using the EL-50313 Midtronics GR8 Battery Tester/Charger.
⇒ If the battery fails the test, replace the Battery. Refer to Battery Replacement in SI.
⇒ If the battery passes the test, replace the starter. Refer to Starter Replacement in SI.
6. No other action is required as the Service Message will automatically clear once the battery and/or starting
system is serviced properly and the vehicle is operated over a number of ignition cycles. Other on board DTCs
may have set if the vehicle experienced a low voltage condition.
Use the scan tool to clear ALL DTCs prior to releasing the vehicle to the Customer.
7. Submit the correct Bulletin Only Labor Operation for this repair: 4080608*.
Service Message Identifier ECF001
Predicted Fuel Pump System – Fuel Tank Fuel Pump Module
1. Remove the fuel tank. Refer to Fuel Tank Replacement in SI.
2. Replace the Fuel Tank Fuel Pump Module. Refer to Fuel Tank Fuel Pump Module Replacement in SI.
3. Install the fuel tank.
4. No other action is required as the Service Message will automatically clear once the fuel tank fuel pump module
is replaced and the vehicle is operated over a number of ignition cycles. Other on board DTCs may have set.
Use the scan tool to clear ALL DTCs prior to releasing the vehicle to the Customer.
5. Submit the correct Bulletin Only Labor Operation for this repair: 4080618*.
Service Message Identifier ECF002
Predicted Fuel Pump System — Fuel Tank Fuel Pump — System High Resistance
1. Inspect the wiring, terminals and connectors of the Body Harness to Fuel Tank Harness X350, ground G401 and
the K111 Fuel Pump Driver Control Module for intermittent conditions and poor connections. Refer to Testing for
Intermittent Conditions and Poor Connections in SI.
⇒ If intermittent conditions and poor connections are found, repair as necessary. Refer to Wiring Repairs,
Repairing Connector Terminals and Connector Repairs in SI.
⇒ If intermittent conditions and poor connections are not found, Go to Step 2.
2. Remove the fuel tank. Refer to Fuel Tank Replacement in SI.
Notice: This Step MUST be performed.
3. Inspect the wiring, terminals and connector running to the fuel tank fuel pump module for intermittent conditions
and poor connections. Refer to Testing for Intermittent Conditions and Poor Connections in SI.
⇒ If intermittent conditions and/or poor connections are found, repair as necessary. Refer to Wiring Repairs,
Repairing Connector Terminals and Connector Repairs in SI.
Then, Go to Step 4.
⇒ If intermittent conditions and/or poor connections are not found, Go to Step 4.
4. Replace the fuel tank fuel pump module. Refer to Fuel Tank Fuel Pump Module Replacement in SI.
5. Install the fuel tank.
6. No other action is required as the Service Message will automatically clear once the fuel system is serviced
properly and the vehicle is operated over a number of ignition cycles. Other on board DTCs may have set.
Use the scan tool to clear ALL DTCs prior to releasing the vehicle to the Customer.
7. Submit the correct Bulletin Only Labor Operation for this repair: 4080628*.
Service Message Identifier ECF003
Predicted Fuel Pump System — Fuel Tank Fuel Pump and Pressure Sensor System Performance
1. Turn OFF the ignition.
Notice: If the engine coolant temperature is above 150°F (60°C), high fuel pressure readings may result due
to hot soak fuel boiling. With the engine OFF, the fuel pressure may increase beyond the pressure relief
regulator valve's setting point of 690 kPa (100 psi) ± 5 percent.
2. Install the CH-37287-1A Fuel Pressure Gauge Adapter and the CH-48027 Digital Fuel Pressure Gauge. Refer to
Fuel Pressure Gauge Installation and Removal in SI.
3. Turn ON the ignition, with the engine OFF.
4. Command the Fuel Pump Enable ON several times, in order to obtain the highest possible fuel pressure.

5. Verify that the CH-48027 fuel pressure is between 50–100 psi (345–690 kPa) with the fuel pump running.
⇒ If the CH-48027 fuel pressure is within the specified range, Go to Step 6.
⇒ If the CH-48027 fuel pressure is not within the specified range, refer to Fuel System Diagnosis in SI.
Notice: The fuel pressure sensor is located on the fuel feed pipe.
6. Verify that the CH-48027 fuel pressure and the Fuel Pressure Sensor parameter agree or are within a range of
+/− 5 psi (34 kPa). If the CH-48027 fuel pressure and the Fuel Pressure Sensor parameter are not within the
specified range, perform the following:
6.1. Inspect the fuel system pipes and hoses for damage, such as kinks or pinches.
6.2. Inspect the wiring, terminals and connectors of the Body Harness to Fuel Tank Harness X350, ground
G401, the B47 Fuel Pressure Sensor X112 and the K111 Fuel Pump Driver Control Module for intermittent
conditions and poor connections. Refer to Testing for Intermittent Conditions and Poor Connections in SI.
⇒ If any fuel system pipes or hoses exhibit damage, repair as necessary.
⇒ If intermittent conditions and/or poor connections are found, repair as necessary. Refer to Wiring Repairs,
Repairing Connector Terminals and Connector Repairs in SI.
⇒ If fuel system pipe or hose damage is not observed and intermittent conditions and/or poor connections are
not found, replace the Fuel Pressure Sensor. Refer to Fuel Pressure Sensor Replacement - Fuel Feed Pipe
in SI.
7. No other action is required as the Service Message will automatically clear once the fuel system is serviced
properly and the vehicle is operated over a number of ignition cycles. Other on board DTCs may have set.
Use the scan tool to clear ALL DTCs prior to releasing the vehicle to the Customer.
8. Submit the correct Bulletin Only Labor Operation for this repair: 4080638*.
Service Message Identifier ECF004
Predicted Fuel Pressure Sensor — Fuel Feed Pipe Pressure Sensor System Performance
1. Turn OFF the ignition.
Notice: If the engine coolant temperature is above 150°F (60°C), high fuel pressure readings may result due
to hot soak fuel boiling. With the engine OFF, the fuel pressure may increase beyond the pressure relief
regulator valve's setting point of 690 kPa (100 PSI) ± 5 percent.
2. Install the CH-37287-1A Fuel Pressure Gauge Adapter and the CH-48027 Digital Fuel Pressure Gauge. Fuel
Pressure Gauge Installation and Removal in SI.
3. Turn ON the ignition, with the engine OFF.
4. Command the Fuel Pump Enable ON several times, in order to obtain the highest possible fuel pressure.
Notice: The fuel pressure sensor is located on the fuel feed pipe.
5. Verify that the CH-48027 fuel pressure and the Fuel Pressure Sensor parameter agree or are within a range of
+/− 5 psi (34 kPa). If the CH-48027 fuel pressure and the Fuel Pressure Sensor parameter are not within the
specified range, inspect the wiring, terminals and connector of the B47 Fuel Pressure Sensor X112 for
intermittent conditions and poor connections. Refer to Testing for Intermittent Conditions and Poor Connections
in SI.
⇒ If intermittent conditions and/or poor connections are found, repair as necessary. Refer to Wiring Repairs,
Repairing Connector Terminals and Connector Repairs in SI.
⇒ If intermittent conditions and/or poor connections are not found, replace the B47 Fuel Pressure Sensor. Refer
to Fuel Pressure Sensor Replacement - Fuel Feed Pipe in SI.
6. No other action is required as the Service Message will automatically clear once the fuel pressure sensor
system is serviced properly and the vehicle is operated over a number of ignition cycles. Other on board DTCs
may have set.
Use the scan tool to clear ALL DTCs prior to releasing the vehicle to the Customer.
7. Submit the correct Bulletin Only Labor Operation for this repair: 4080648*.

Warranty Information
For vehicles repaired under warranty, use:
Labor Operation

Description

Labor Time

4080568*

Service Message Identifier SAC001

0.3 hr

4080578*

Service Message Identifier SAC002

0.3 hr
Add Time: 0-.5 hr

4080588*

Service Message Identifier SAC003

0.3 hr
Add Time: 0-.5 hr

Labor Operation

Description

Labor Time

4080598*

Service Message Identifier SAC004

0.6 hr
Add Time: 0-.5 hr

4080608*

Service Message Identifier SAC005

0.6 hr
Add Time: 0-.5 hr

4080618*

Service Message Identifier ECF001

FWD 1.3 hrs
AWD 2.1 hrs

Service Message Identifier ECF002

FWD 1.3 hr
Add Time: 0-.5 hr
AWD 2.1 hr
Add Time: 0-.5 hr

4080638*

Service Message Identifier ECF003

Fuel Tank Fuel Pump
Module Replacement
FWD 1.3 hrs
Add Time: 0-.5 hr
AWD 2.1 hrs
Add Time: 0-.5 hr
OR
Fuel Pressure Sensor
Replacement - Fuel
Feed Pipe
0.3 hr
Add Time: 0-.5 hr

4080648*

Service Message Identifier ECF004

0.5 hr
Add Time: 0-.5 hr

4080628*

*This is a unique Labor Operation for Bulletin use only. It will not be published in the Labor Time Guide.

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