Bulletin No.: PIE0814A

Service Bulletin

Date: March, 2025

ENGINEERING INFORMATION
Subject:
Attention:

Engineering Information - Service AWD Lamp Illuminated on Driver Information
Center (DIC), DTC C0090 Set
Proceed with this EI ONLY if the customer has commented about this
concern AND the PIE number is listed in the Global Warranty
Management / Investigate History link (GWM/IVH). If the customer has not
commented about this condition or the EI does not show in GWM/IVH,
disregard the PIE, and proceed with diagnostics found in published
service information. THIS IS NOT A RECALL refer to Service Bulletin
04-00-89-053 for more details on the use of Engineering Information
bulletins.

This EI has been revised to update the Subject, Condition, Correction, Contact
Information, and Warranty Information. Please discard PIE0814.
Brand:

Model:

Chevrolet

Equinox

GMC

Terrain

Model Year:

Breakpoint:

from

to

from

to

2025

2025

—

—

Engine:

Transmission:

—

—

Involved Region or Country

U.S. Dealers ONLY

Additional Options (RPOs)

Equipped with CHASSIS DRIVE LINE - ALL WHEEL DRIVE (AWD)/FOUR WHEEL
DRIVE(4WD), DRIVER SELECT (RPO MGH)

Condition

Some customers may comment on the Service AWD Lamp illuminated on Driver
Information Center (DIC).
Technicians may find DTC C0090 set.

Cause

GM Engineering is attempting to determine the root cause of the above condition.
Engineering has a need to gather information on vehicles PRIOR to repair that may
exhibit this condition. As a result, this information will be used to "root cause" the
customer's concern and develop/validate a field fix.

Correction
Important: Service agents must comply with all International, Federal, State, Provincial, and/or Local laws
applicable to the activities it performs under this bulletin, including but not limited to handling, deploying,
preparing, classifying, packaging, marking, labeling, and shipping dangerous goods. In the event of a
conflict between the procedures set forth in this bulletin and the laws that apply to your dealership, you
must follow those applicable laws.
If you encounter a vehicle with the above concern, perform the following and contact the engineer listed below with
your findings and for further instructions.
Important: DO NOT clear any codes or replace any parts.
Capture Failure Record/Freeze Frame from K20 module.

Copyright 2025 General Motors. All Rights Reserved.

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Bulletin No.: PIE0814A

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1. Go to Module Diagnostic.

6862963

1.1.

Select the K20 Engine Control module.

Bulletin No.: PIE0814A

March, 2025

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1.2.

Go into the DTC folder.

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1.3.

Select Freeze Frame to read the information off the ECM.

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March, 2025

Bulletin No.: PIE0814A

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1.4.

After the freeze frame data is collected go to home screen via the Home button.

6862975

1.5.

Select Review Stored data.

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March, 2025

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1.6.

Click on the Edit button.

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1.7.

Select the vehicle for which you just captured the data and click the Export button.

2. Send the session log zip folder over to the engineering.

Contact Information

The Contact Information has been redacted.

Please include the following information if leaving a message:
-

Technician name

-

Dealer name and phone number

-

Complete VIN and repair order (R.O) number

On the repair order, document the date and time the call was placed (even if the engineer was not reached).

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March, 2025

Bulletin No.: PIE0814A

If engineering is unable to return the call within one hour, proceed with diagnosis and repair based on information
found in SI.

Warranty Information
If an engineer was contacted or required information was provided, use:
Labor Operation

Description

Labor Time

3086058*

Engineering Information - Service AWD Lamp Illuminated on
(DIC), DTC C0090 Set

0.5 Hrs.

*This is a unique Labor Operation for bulletin use only.

Version

2

Modified

Released January 17, 2025
Revised March 12, 2025 - Updated the Subject, Condition, Correction, Contact
Information, and Warranty Information.

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 equipment, tools, 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 GM dealer for information on whether your vehicle may benefit from the
information.

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