A/C Inoperative and/or Insufficient Cooling – 2017-2018 Cadillac Chevrolet & GMC

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Service Bulletin
File in Section: –
Bulletin No.: 18-NA-156
Date: August, 2018
TECHNICAL
Subject: A/C Inoperative and/or Insufficient Cooling
This bulletin replaces PIT5614. Please discard PIT5614.
Brand: Model:
Model Year: Breakpoint:
Engine:
Transmission:
from to from to
Cadillac Escalade
Models
2017 2018
Built Between August 01,
2017 – August 01, 2018
Plant Location:
Silao, Mexico
Arlington, USA
Fort Wayne, USA (Only if
equipped with Enhanced
Towing RPO NHT)
All All
Chevrolet
Silverado
Suburban
Tahoe
GMC
Sierra
Yukon
Models
Involved Region or Country North America and NA Export vehicles
Condition Some customers may comment on the air conditioning inoperative and/or insufficient
cooling.
Cause
Leaking seal(s) only at the Receiver/Dehydrator plug. As illustrated in the following
photos, none have been found at the blind coupler or tube connections. If this concern is
present there will be dye evidence at the Receiver/Dehydrator plug connection.
Correction
Replace the Receiver/Dehydrator plug assembly using part number 22996648. When
replacing the Receiver/Dehydrator plug assembly apply a light coating of AC oil to the O
rings prior to installing the assembly.
Important: Dealers: Only order kits for known leaking vehicles. Due to limited availability
we wish to maximize inventory at CCA.
Page 2 August, 2018 Bulletin No.: 18-NA-156
Service Procedure
5051515
If you encounter a vehicle with the above concern,
inspect the receiver dryer plug (2) at the bottom of the
desiccant tube (1) on the driver’s side of the condenser
for signs of leaking. If a leak is found, replace the
receiver and dehydrator. Refer to Receiver and
Dehydrator Replacement in SI.
No Evidence of Dye Will Be Found
Around the Following Areas
Around the Blind Coupler
Note: Condenser shown in following pictures, is out of
vehicle to provide a better view of areas of concern.
5105651
Around the Line Tube Connections
5105654
5105656
Bulletin No.: 18-NA-156 August, 2018 Page 3
Low Mileage Vehicles Dye Will be
Difficult to See
Dye is water soluble and rain may make this difficult to
detect dye. Arrows indicate dye evidence
5105659
5105662
Higher Mileage and More Severe Leaks
(Dye Will Appear More Prominent)
5051497
The dye will show in the plug threads and below the
seals.
5051503
Page 4 August, 2018 Bulletin No.: 18-NA-156
5051508
Note: Depending on vehicle A/C usage, the leak may
not be visible as dye may not have circulated through
the A/C system. The A/C system may need to be
recharged and dye added before a test drive is
performed to circulate the dye through the A/C system.
Parts Information
Causal
Part
Description Part
Number
Qty
X RECEIVER &
DEHYDRATOR
ASM,A/C
22996648 1
Warranty Information
For vehicles repaired under warranty use:
Labor Operation Description Labor Time
4416110 Receiver and Dehydrator Replacement Use Published Labor
Operation Time
Version 3
Modified Released June 11, 2018
Revised July 30, 2018 – Updated the Breakpoint.
Revised August 09, 2018 – Updated the Breakpoint.

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