File in Section:

Service Bulletin

-

Bulletin No.:

16-NA-234

Date:

July, 2016

TECHNICAL
Subject:

A/C Poor or No Cooling

Brand:

Model:

Cadillac

XT5

Model Year:

VIN:

from

to

2017

2017

from

Engine:

Transmission:

All

All

to

Involved Region or Country

North America and N.A. Export Regions

Condition

Some customers may comment on A/C with poor or no cooling.

Cause

The cause of the condition may be a production spill at the supplier, where AC
compressor builds contained bores which were undersized.

Correction
First verify the condition by performing an AC
performance test, looking for low and high side
pressure readings that are almost equal. Refer to Air
Conditioning (A/C) System Performance Test in SI.
Once the condition is confirmed, complete the
Inspection Procedure below to verify if the AC
compressor is within the window of mis-built
compressors from the supplier.

Inspection Procedure

4559949

The compressor cylinder contains die-cast date codes
(shown circled above) that indicate the month (letter)
and a day (number) of the compressor build. The
die-casts are located on the rear surface of the
compressor cylinder, against the engine block. To
Copyright 2016 General Motors LLC. All Rights Reserved.

visually inspect these die-casts, it will be necessary to
partially remove the compressor and position it away
from the engine.

Page 2

July, 2016

Bulletin No.: 16-NA-234

Important: It is not necessary to disconnect any AC
lines or recover/recharge the refrigerant. This
inspection can be done with the AC lines and electrical
connectors intact.

4559951

Note: A date code of January 28 is shown in the
example above.
Known bad compressors fall within the date ranges
specified below:
• Die-cast month of “A” = January. ALL dates in
January are bad compressors; no need to verify
day of build.
• Die-cast month of “B” = February. ANY February
compressors in combination with dates 1 – 13,
66 or 99 are bad.
1. Raise and support the vehicle. Refer toLifting and
Jacking the Vehicle in SI.

4559954

4. Remove the compressor fasteners and position the
compressor away from the engine block. Refer to
AC Compressor Replacement in SI.

4559966

5. Inspect the compressor body for two circled
die-casts, date (1) and month (2), located at the
positions shown in the graphic above. Then refer to
4559952

2. Remove the forward half of the right front
wheelhouse liner and position liner rearward. Refer
to Front Wheelhouse Liner Replacement in SI.
3. Loosen the drive belt tension enough to remove
the drive belt from the AC compressor. Refer to
Drive Belt Replacement in SI.

Bulletin No.: 16-NA-234

July, 2016

Page 3

the previous listing of known bad compressors to
see if the date stampings of your compressor
matches one of those listed.
• If the date codes match, your compressor is
bad and will need replacement. Move ahead to
the Service Procedure to complete the
replacement of the compressor.
• If the date codes don’t match, your
compressor is likely not the cause of the issue.
Reassemble the vehicle, then refer to further
AC diagnostics in SI.

Service Procedure
1. Continue with the remaining steps necessary for
removal of the AC compressor. Refer to AC
Compressor Replacement in SI.
2. Install the new AC compressor. Refer to AC
Compressor Replacement in SI.

Parts Information
Description

Part
Number

Qty

A/C Compressor

23422341

1, if
necessary

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

Description

Labor Time

A/C System Analysis

Use
Published
Labor
Operation
Time

Air Conditioning
Compressor Replacement
(Inc. Date Code Inspection)

3.0 hrs

4417169

4480498*

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

Version

1

Modified

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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