Subject:

Engineering Information - Information on Seized A/C Compressor

Attention:

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 add Important Statement and 2024 Model Year also update the Engine, Contact, and Warranty Information.
Please discard PIE0747C.
Brand:

Chevrolet

GMC

Model:

Model Year:

VIN Breakpoint:

from

to

from

to

Silverado 1500 New
(RPO J22, VIN Digit 5 = A
/ D)

2022

2022

—

—

Silverado 1500

2023

2024

Sierra 1500 New (RPO
J22, VIN Digit 5 = H / U)

2022

2022

Sierra 1500

2023

2024

Engine:

Transmission:

Equipped with 5.3L or
6.2L Engines (RPOs
L84 or L87) ONLY

—

Involved Region or Country

U.S. Dealers ONLY

Condition

The purpose of this EI is to inform dealership personnel on information for seized A/C compressors.

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 steps contact the engineer listed below with your findings:
Important: This engineering investigation will incorporate return parts if repairs are performed. These returned parts will be covered by the same
policies as any parts on 100% return, and return of parts is a requirement for claim fulfillment. These parts could include, the compressor, the
condenser, the refrigerant hose assembly, and the thermostatic expansion valve (TXV). All parts should be packaged and returned to the WPC.
1.

Confirm if the A/C compressor is seized by examining the rubber portion of the compressor clutch/belt condition and the rotation of inner portion of the
hub.
Note: If the belt/rubber portion of clutch has damage or appears melted and the compressors inner hub does not rotate freely, the A/C compressor is
seized.

2.

If the compressor is seized, please gather the following information/complete the following steps:

Questionnaires
1.

What was the condition/timing that the issue was noticed?
1.1. Was the issue noticed at engine start or did it occur at some point while driving?
1

1.2. What were the operating conditions at the time of failure? (ex. Idle/warm-up, stopped at a stop light, 70 mph, stop & go traffic, etc.)
1.3. How long was the vehicle running prior to the failure? (Immediately or at start up? Shortly after start up? After significant driving? Turned off then
occurred after restart?)
1.4. What were the HVAC operating conditions at the time of failure? (ex. A/C on or off, Auto temp setting at 72°F, low blower, etc.)
1.5. Any additional details available regarding the vehicle operation prior to the trip when the failure occurred? (ex. Driving/idling, HVAC settings,
operation time, etc.)
2.

Confirm the amount of refrigerant remaining in the A/C system.
2.1. Evacuate the A/C system and record the refrigerant amount recovered.
2.2. If the charge is low compared to expected vehicle charge, hold vacuum for 15 minutes and record any pressure increase to identify if there is a
system leak.
2.3. If a system leak is identified, use SI to identify and record the suspected location of leakage.

3.

Confirm the condition of the oil within the A/C compressor.
3.1. Remove the A/C compressor from the vehicle and drain the oil through the compressor oil plug into a container. Record the condition of oil such
as color, amount of oil in grams or cc, foreign material presence, etc.
Important: Retain the oil that was drained for return.
3.2. If the oil appears dark in color or has signs of foreign material, flush the A/C system and replace the desiccant/condenser filter and the TXV
BEFORE installing the replacement A/C compressor and fill the system with a full oil charge per SI.
Important: Retain these components with the oil that was drained and the failed A/C compressor for return. Components requested are; TXV,
dessicant, oil, and/or condenser if those components are replaced.

4.

Call the engineer listed below with your findings.

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).
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 engineer was contacted or required information was provided, use:
Labor Operation

Description

Labor Time

4488378*

Engineering Information - Information on Seized A/C Compressor

4.0 Hrs.

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

Version

5

Modified

Released May 10, 2023
Revised June 05, 2023 - Updated the Subject, Condition and Warranty Information.
Revised June 09, 2023 - Updated the Correction.
Revised July 25, 2023 - Updated the Contact Information.
Revised July 31, 2023 - Revised to add Important Statement and 2024 Model Year also update the Engine,
Contact, and Warranty Information.

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