Service Bulletin

Bulletin No.:

18-NA-240

Date:

June, 2019

TECHNICAL
Subject:

Air Conditioning (A/C) Blows Warm Air

Brand:

Model:

Buick

Enclave

Cadillac

XT5

Chevrolet

Traverse

GMC

Acadia

Model Year:

VIN:

Engine:

from

to

from

to

2018

2018

Sept.
1, 2017

June 1, 2018

Transmission:

Involved Region or Country

North America, Europe, Russia, Middle East, Israel, Japan, South Korea, South America
and Africa

Condition

Some customers may comment that the A/C blows warm air.
The technician may find low or empty refrigerant in the system.

Cause

This condition may be caused by a leak at the A/C condenser receiver/dehydrator
tank plug.

Copyright 2019 General Motors LLC. All Rights Reserved.

Page 2

June, 2019

Bulletin No.: 18-NA-240

Note: The Receiver/Dehydrator Plug can be found in the lower left side of vehicle. For
clarity, the condenser shown below is out of vehicle and up-side down.

Correction

4817931

Note: Due to possibility of the new/replacement desiccant being compromised, replace
ONLY the Receiver/Dehydrator plug until further notice. Do not open the A/C system until
the replacement part is at the dealer.
Important: If the A/C system has been open or at zero pressure for more than 4 hours,
replace the condenser.
1. Inspect the AC Condenser (1) and inspect the receiver/dehydrator tank plug (2).
2. Add A/C dye to verify that the leak is coming from the plug.
• If refrigerant has been validated to be coming from the tank, replace the plug using a
desiccant kit.
• If no signs of leaking have been found, refer to SI for further diagnostics.

Service Procedure
Important: Apply a light coating of AC oil to the O rings
prior to installing the assembly.
Refer to Receiver and Dehydrator Replacement in SI.

Parts Information
Causal Part

Description

Header
Enclave

X

RECEIVER &
DEHYDRATOR KIT,
A/C

Traverse
Acadia
XT5

Part Number

Qty

23350130
1
84473270

Bulletin No.: 18-NA-240

June, 2019

Page 3

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

Description

Labor Time

4416110

Receiver and Dehydrator
Replacement

Use
Published
Labor
Operation
Time

Version

2

Modified

Released October 17, 2018
Revised June 17, 2019 - Added a Note on Clarity in the Corrections section.

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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