Bulletin No.:

Service Bulletin

Date:

19-NA-218
February, 2023

TECHNICAL
Subject:

Ticking Noise from the Engine
This bulletin replaces PIP5606E. Please discard PIP5606E.

Brand:

Cadillac

Model:

VIN:

CTS

2019

2019

6.2L (LT4)

Escalade

2019

2022

5.3L, 6.2L (L83,
L86, L87)

Camaro

2019

2022

6.2L (LT1, LT4)

2019

2019

6.2L (LT1,
LT4, LT5)

2020

2022

6.2L (LT2)

Silverado 1500
(New Model 12th Digit
VIN = 7) - 4WD

2019

2019

4.3L, 5.3L, 6.2L
(LV3, L82,
L84, L87)

Silverado 1500
(New Model)

2019

2021

4.3L, 5.3L, 6.2L
(LV3, L82,
L84, L87)

2022

2022

5.3L, 6.2L (L82,
L84, L87)

Silverado LD

2019

2019

5.3L, 6.0L, 6.2L
(L83, L96, LC8)

Suburban

2019

2022

5.3L, 6.2L (L83,
L84, L86, L87)

Tahoe

2019

2022

5.3L, 6.0L, 6.2L
(L83, L84, L86,
L87, L96)

Sierra Limited

2019

2019

5.3L, 6.0L (L83,
L96, LC8)

Sierra 1500 (New Model)

2019

2021

4.3L, 5.3L, 6.2L
(L82, L84,
L87, LV3)

2022

2022

5.3L, 6.2L (L82,
L84, L87)

2019

2022

5.3L, 6.2L (L83,
L84, L86, L87)

Silverado 1500 LTD (RPO
J21, VIN Digit 5 = W / Y)
Silverado 1500 New (RPO
J22, VIN Digit 5 = A / D)

from

—

GMC

Sierra 1500 Limited (RPO
J21, VIN Digit 5 = 8 / 9)
Sierra 1500 New (RPO
J22, VIN Digit 5 = H / U)
Yukon Models

Copyright 2023 General Motors LLC. All Rights Reserved.

to

Engine:

to

Corvette

Chevrolet

Model Year:
from

—

Transmission:

—

Page 2
Involved Region or Country

Condition

February, 2023

Bulletin No.: 19-NA-218

North America, Argentina, Brazil, Chile, Colombia, Ecuador, Paraguay, Peru, Uruguay,
Europe, Middle East, Iraq, Israel, Palestine, Japan, Cadillac Korea (South Korea), GM
Korea Company, Australia/New Zealand
Some customers may comment that they hear a ticking noise coming from the engine
when cold.

⇒ This ticking noise will mainly occur during the first initial start in the morning.
Cause

This condition may be caused by a lifter not having a sufficient amount of oil during cold
start operation (not pumped up).

Correction

To correct this condition, follow the Service Procedure below.

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.

Service Procedure
Allow the engine to sit overnight.
Note: You may need to allow 5-7 minutes to confirm.
1. Start the vehicle and listen for a tick noise.
• If a tick noise is present, proceed to the
next step.
• If a tick noise is NOT present after running
engine for at least 5 to 7 minutes, release the
vehicle back to the customer.
2. Drive the vehicle through the DFM modes.
3. Check for any misfire DTCs and record:
• If DTCs are found, refer to SI for diagnosis.
• If no DTCs are found and noise still persists,
operate the engine through cylinder
Deactivation test to isolate the cylinder with the
concern.
4. If the noise has been isolated, inspect for a bent
pushrod and/or collapsed lifter.
⇒ If the pushrods are found to be in working
condition, replace the lifters on the affected
banks. Refer to Valve Lifter Replacement in SI.

Bulletin No.: 19-NA-218

February, 2023

Page 3

Parts Information
Note:Only select the parts that coincide with the
repair performed. Replace the part with the P/N
outlined in the Electronic Parts Catalog (EPC) in
accordance with the vehicle VIN.
Note: Refer to Service Bulletin # 20-NA-038 for
additional information on AFM and DFM usage.
Causal Part

Description

Part Number

Qty
2 per bank (6 CYL DFM)

X

LIFTER, VLV (Active)

12698946

4 per bank (8 CYL AFM)
8 per bank (8 CYL DFM)
4 per bank (6 CYL)

X

LIFTER, VLV (NON-ACTIVE LIFTERS)

12698945

N/A

GASKET, CYL HD (L82, L83, L84)

12622325

1

N/A

GASKET, CYL HD (L87)

12688943

1

N/A

GASKET, CYL HD (LC8, L96)

12610046

1

4 per bank (8 CYL non DFM)

N/A

GASKET, CYL HD (LT1)

12688943

1

N/A

GASKET, CYL HD (LV3)

12632968

1

N/A

GASKET, CYL HD (L86, LT2)

12688943

1

N/A

BOLT, CYL HD (M12x1.75 x 102)

11611976

Refer to EPC

N/A

BOLT, CYL HD (M12x1.75 x 134)

11546959

Refer to EPC

N/A

BOLT, EXH MANIF

Refer to EPC

As Required

N/A

GASKET, VLV RKR ARM CVR

12630883

1 (6 CYL)

N/A

GASKET, VLV RKR ARM CVR

12619787

1 (8 CYL)

N/A

GASKET, EXH MANIF

12657093

1

N/A

SEAL, EXH MSNIF PIPE (R)

15035747

1

N/A

SEAL, EXH MSNIF PIPE (L)

15077362

1

N/A

BELT, ACSRY DRV PRIM

12669858 (L84 L87)

1

N/A

PIPE, FUEL FEED INTER

Refer to EPC

1

N/A

PIPE, FUEL FEED INTER (FROM PMP
TO CROSSRAIL LINE)

Refer to EPC

1

N/A

GASKET, INT MANIF

12626354

6 (6 CYL)
8 (8 CYL)

N/A

GASKET, W/PMP

12682391

1

N/A

SEAL, KIT F/INJR (O-ring)

Refer to EPC

As Required

Page 4

February, 2023

Bulletin No.: 19-NA-218

Warranty Information
Note: Only select the labor operation that coincides
with the repair performed.
For vehicles repaired under the Powertrain coverage,
use the following labor operation. Reference the
Applicable Warranties section of Investigate Vehicle
History (IVH) for coverage information.
Labor
Operation

Description

Labor Time

4062390

Valve Lifter Replacement Right Side

4062391

Valve Lifter Replacement Both Sides

4062410

Valve Lifter Replacement Left Side

4062450

Valve Lifter Replacement

Use
Published
Labor
Operation
Time

Version

10

Modified

Released February 14, 2020
Revised May 28, 2020 – Added RPO LT2 to Corvette and Cylinder Head Gasket P/Ns
12632968 (LV3) and 12688943 (L87) to Parts Information.
Revised December 01, 2020 – Updated the Quantity information for P/N 12626354 and
12672366 in the Parts Information section.
Revised December 16, 2020 – Added the 2021 Model Year to certain vehicles, added
Engine RPOs and updated the Parts Information section.
Revised September 08, 2021 – Added Australia/New Zealand to Involved Region or
Country section and updated the Parts Information section.
Revised December 17, 2021 – Added the 2022 Model Year to certain vehicles and
updated a Gasket and both Valve Lifter part numbers and added Gasket part number
12630883.
Revised March 30, 2022 – Added PIPE, FUEL FEED INTER (FROM PMP TO
CROSSRAIL LINE) to Parts Information section.
Revised July 11, 2022 – Added an Important statement above the Service Procedure and
information for P/N 12630883 (V6) and 12619787 (V8) in the Parts Information section.
Revised January 20, 2023 – Added Exhaust Manifold Bolts to Parts Information section
and updated the Involved Region or Country section.
Revised February 08, 2023 – Updated SEAL, KIT F/INJR (O-ring) to Refer to EPC in the
Parts Information section.

Additional SI Keywords: P0300, P0301, P0302, P0303,
P0304, P0305, P0306, P0307, P0308, P050D

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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