22-NA-216

Bulletin No.:
Service Bulletin
Date:
22-NA-216
November, 2022
INFORMATION
Subject:
Information on Concern of an Engine Thermostat Tick Noise and/or Running Hot
This bulletin replaces PIP5212D. Please discard PIP5212D.
Brand:
Cadillac
Chevrolet
GMC
Model:
Model Year:
VIN:
from
to
Engine:
from
to
CT5
2023
2023
LT4
CTS
2016
2019
LT4
Escalade Models
2015
2023
L86, L87
Camaro
2016
2023
LT1, LT4
Corvette
2014
2023
LT1, LT2, LT4, LT5
Silverado 1500
2014
2018
Silverado 1500 (New
Model)
2019
2019
Silverado LD
2019
2019
Silverado 1500
2020
2021
Silverado 1500 - New
(RPO J22, VIN Digit 5 =
A/D)
2022
2022
Silverado 1500
2023
2023
Silverado 2500HD/3500HD
2020
2023
Suburban
2015
2023
L83, L84, L87
Tahoe
2015
2023
L83, L84,
L86, L87
Sierra 1500
2014
2018
Sierra 1500 (New Model)
2019
2019
Sierra Limited
2019
2019
Sierra 1500
2020
2021
2022
2022
Sierra 1500
2023
2023
Sierra 2500HD/3500HD
2015
2023
L8T, L96
2023
L83, L84,
L86, L87
LV3, L82, L83,
L84, L86, L87
Silverado 1500 - LTD (RPO
J21, VIN Digit 5 = W/Y)
Sierra 1500 - Limited (RPO
J21, VIN Digit 5 = 8/9)
Sierra 1500 - New (RPO
J22, VIN Digit 5 = H/U)
Yukon Models
Copyright 2022 General Motors LLC. All Rights Reserved.
2015
Transmission:
—
—
L8T, L96
LV3, L82, L83,
L84, L86, L87
—
Page 2
November, 2022
Bulletin No.: 22-NA-216
Involved Region or Country
North America, Europe, Russia, Middle East, Iraq, Israel, Palestine, Argentina, Brazil,
Bolivia, Chile, Colombia, Ecuador, Paraguay, Peru, Japan, Cadillac Korea (South Korea),
GM Korea Company, China, Thailand, Australia/New Zealand, Other Africa
Condition
Some technicians may find the engine running hot and/or has a tick noise from the
thermostat area.
Some technicians may also find a repair was previously performed on said vehicle.
Cause
This condition may be caused by the cylinder head gasket being installed incorrectly after
a service procedure requiring the cylinder head to be removed and replaced.
Inspect the position of the head gasket locating tabs to determine if the head gasket(s)
has been possibly installed backwards.
Per the attached pictures, the head gasket locating tabs for both of the engine cylinder
banks should be toward the front of the engine:
3960230
Information
3960232
– #1 is Bank 1 tab near cylinder 3
– #2 is Bank 2 tab near cylinder 4
– #3 is the front of the engine
If the head gasket locating tabs are found to be closer to cylinders 5 or 6, this indicates
the head gaskets were installed incorrectly, restricting the engine coolant flow.
Replace the head gasket for this concern.
Note: GEN5+ engines (L82, L84, L87 all model years).
Bulletin No.: 22-NA-216
November, 2022
Page 3
This noise can sound more like a scraping noise (similar to a failed bearing type noise) on
these engines, generally the noise can be heard near the water pump area and it goes
away when the belt is removed. This noise could have developed after the head gasket
was replaced for another engine repair procedure.
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.
Version
2
Modified
Released October 26, 2022
Revised November 18, 2022 - Added 2021, 2022 and 2023 to Tahoe.
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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