Ticking Noise From The Engine – 2019-2021 Cadillac Chevrolet & GMC

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Service Bulletin Bulletin No.: 19-NA-218
Date: December, 2020
TECHNICAL
Subject: Ticking Noise from the Engine
This bulletin replaces PIP5606E. Please discard PIP5606E.
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Cadillac
CTS 2019 2019
— —
6.2L (LT4)
—
Escalade 2019 2021 5.3L, 6.2L (L83,
L86, L87)
Chevrolet
Camaro 2019 2021 6.2L (LT1, LT4)
Corvette
2019 2019 6.2L (LT1,
LT4, LT5)
2020 2021 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)
Silverado LD 2019 2019 5.3L, 6.0L, 6.2L
(L83, L96, LC8)
Suburban 2019 2021 5.3L, 6.2L (L83,
L84, L86, L87)
Tahoe 2019 2021
5.3L, 6.0L, 6.2L
(L83, L84, L86,
L87, L96)
GMC
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)
Yukon
Models 2019 2021 5.3L, 6.2L (L83,
L84, L86, L87)
Involved Region or Country
North America, Europe, Russia, Middle East, Iraq, Israel, Palestine, Argentina, Brazil,
Chile, Colombia, Ecuador, Paraguay, Peru, Uruguay, Venezuela, Japan, Cadillac Korea
(South Korea), GM Korea Company, Thailand
Condition
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.
Page 2 December, 2020 Bulletin No.: 19-NA-218
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.
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.
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
X LIFTER, VLV
(Active) 12680871
2 per bank
(6 CYL DFM)
4 per bank
(8 CYL AFM)
8 per bank
(8 CYL DFM)
X
LIFTER, VLV
(NON-ACTIVE
LIFTERS)
12648846
4 per bank
(6 CYL)
4 per bank
(8 CYL
non DFM)
N/A GASKET, CYL HD
(L82, L83, L84) 12622325 1
N/A GASKET, CYL
HD (L87) 12688943 1
Causal
Part
Description Part
Number
Qty
N/A GASKET, CYL HD
(LC8, L96) 12610046 1
N/A GASKET, CYL
HD (LT1) 12659260 1
N/A GASKET, CYL
HD (LV3) 12632968 1
N/A GASKET, CYL HD
(L86, LT2) 12688943 1
N/A BOLT, CYL HD
(M12x1.75×102) 11611976 Refer
to EPC
N/A BOLT, CYL HD
(M12x1.75×134) 11546959 Refer
to EPC
N/A GASKET, VLV
RKR ARM CVR 12619787 1
N/A GASKET, EXH
MANIF 12657093 1
N/A PIPE, FUEL
FEED INTER
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) 12672366 Refer
to EPC
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
Use
Published
Labor
Operation
Time
4062391 Valve Lifter Replacement –
Both Sides
4062410 Valve Lifter Replacement –
Left Side
4062450 Valve Lifter Replacement
Bulletin No.: 19-NA-218 December, 2020 Page 3
Version 4
Modified
Released February 14, 2020
May 28, 2020 – Added RPO LT2 to Corvette and Cylinder Head Gasket P/Ns 12632968
(LV3) and 12688943 (L87) to Parts Information.
December 01, 2020 – Updated the Quantity information for P/N 12626354 and 12672366
in the Parts Information section.
December 16, 2020 – Added the 2021 Model Year to certain vehicles, added Engine
RPOs and updated the Parts Information section.
Additional SI Keywords: P0300, P0301, P0302, P0303,
P0304, P0305, P0306, P0307, P0308, P050D

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