18NA335

File in Section:
Bulletin No.:
Service Bulletin
Date:
18-NA-335
January, 2019
INFORMATION
Subject:
Information on Small Engine Water Pump and Water Pump Housing Replacement
Model Year:
VIN:
Engine:
Brand:
Model:
Buick
Encore
2016
LE2
Cruze (Gen
II - VIN B)
2016
LE2
Chevrolet
GMC
from
to
from
Equinox
2018
Malibu
2016
Spark
(VIN C)
2016
LV7
Volt
2016
L3A
Terrain
2018
LYX
Involved Region or Country
Transmission:
to
LYX
2019
LFV
North America and N.A.Export Markets.
Some technicians may not be using the correct water pump and water pump housing
replacement labor code and part when a repair is performed on a small gas engine family
of engines.
Condition
Cause
Copyright 2019 General Motors LLC. All Rights Reserved.
⇒ Some water pumps may have been replaced when the actual failure has
been found to be the water pump housing.
⇒ New water pumps are being returned to the Warranty Parts Center with the
old water pump housing installed.
This condition may be caused by the description used in the Electronic Parts
Catalog (EPC).
Page 2
January, 2019
Bulletin No.: 18-NA-335
Important: Failure to use the correct part and the correct labor code could result in a
debit of the claim.
5162998
The image above depicts a Water Pump Housing:
Information
⇒ If the water pump requires replacement for a noise, leak or poor coolant flow.
Refer to Housing w/PMP in the EPC when ordering parts.
⇒ Use labor code 4032740 - Water Pump Housing Replacement.
5163000
The image above depicts a Water Pump:
Note: When ordering the water pump. A water pump housing comes pre-installed on the
water pump as an assembly.
⇒ If the water pump requires replacement for a crack or leak. Refer to Pump,
Wat in the EPC when ordering parts.
⇒ Use labor code 4032750 - Water Pump Replacement.
Parts Information
No parts are required for this repair.
Version
1
Modified
Released January 03, 2019
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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