Bulletin No.:

Service Bulletin

Date:

15-06-01-002M
January, 2023

TECHNICAL
Subject:

Engine Misfire/Tick Noise, Malfunction Indicator Lamp (MIL) Illuminated - DTC
P0300 Set

Models:

2015–2020 Cadillac Escalade
2016–2019 Cadillac CTS-V
2014 Chevrolet Silverado 1500
2014–2019 Chevrolet Corvette
2015–2018 Chevrolet Silverado
2015–2020 Chevrolet Suburban, Tahoe
2016–2023 Chevrolet Camaro
2019 Chevrolet Silverado LD
2014 GMC Sierra 1500
2015–2018 GMC Sierra
2015–2020 GMC Yukon, Yukon XL
2019 GMC Sierra Limited
Equipped with 5.3L Engine (RPOs L83, L8B) or 6.2L Engine (RPOs L86, LT1, LT4)

Attention: This bulletin also applies to any of the above models from North America, Europe,
Uzbekistan, Russia, Middle East, Iraq, Israel, Palestine, Argentina, Brazil, Bolivia, Chile,
Colombia, Ecuador, Paraguay, Peru, Uruguay, Venezuela, Japan, Cadillac Korea (South
Korea), GM Korea Company, China, Taiwan, Thailand, Singapore, Philippines, Egypt,
Other Africa, South Africa
This bulletin has been revised to add the 2022–2023 Model Years to the Camaro. Please
discard Corporate Bulletin Number 15-06-01-002L.

Condition

Correction

Some customers may comment on a malfunction
indicator lamp (MIL) on and/or an engine misfire/tick
noise.
Technicians may find DTC P0300 set or in history.

Note: Thoroughly inspect the camshaft and lifters for
any damage to the lobes or rollers. If you find excessive
wear on either component, it will be necessary to
replace the camshaft and lifters. It is not necessary to
replace the engine assembly. Refer to Service Bulletin
# 18-NA-073: Repair Guidelines for Engine
Component Wear.

Cause
This may be caused by one of the following conditions:
• Active fuel management (AFM) lifter that is
mechanically collapsed and/or stuck all of
the time.
• Internal locking pin damage in the lifter, due to oil
aeration.
• Lifter that has collapsed and is stuck in the
lifter bore.
• The engine may have a bent push rod.

Copyright 2023 General Motors LLC. All Rights Reserved.

If SI diagnosis does not isolate the cause of this
concern, technicians should inspect for valve operation.
If the valve(s) are not moving, replace the valve lifter oil
manifold and affected bank of AFM lifters. Refer to
Valve Lifter Oil Manifold Replacement and Valve Lifter
Replacement in SI.
If the lifter has spun the bore, the guides should also be
replaced.

Page 2

January, 2023

Bulletin No.: 15-06-01-002M

Recommendation/Instructions

Parts Information

Important: Any time a lifter is replaced, the lifter
guide(s) must also be replaced.
There are two approved processes for removing the
lifter when stuck in the bore.

Note: Only select the parts that coincide with the repair
performed.
Causal
Part

Part Number

Description

Qty

19431561

MANIFOLD ASMVLV LFTR OIL
(SERV KIT) (L83,
L86, L8B or LT1)

1

19431563

MANIFOLD ASMVLV LFTR OIL
(SERV KIT) (LT4)
Kit usage is
determined by fuel
pipe part number
removed

1

N/A

19431574

MANIFOLD ASMVLV LFTR OIL
(SERV KIT) (LT4)
Kit usage is
determined by fuel
pipe part number
removed

1

N/A

12669185

GUIDE, VLV LFTR
(see catalog
reference)

2

N/A

12669184

GUIDE, VLV LFTR
(see catalog
reference)

2

N/A

12659260

GASKET-CYL
HD (6.2L)

1

N/A

12622325

GASKET-CYL
HD (5.3L)

1

N/A

11546959

RIGHT SIDE
CYLINDER HEAD
BOLTS

10

N/A

11611976

LEFT SIDE
CYLINDER
HEAD BOLT

1

N/A

11546959

LEFT SIDE
CYLINDER HEAD
BOLTS

9

N/A

12657093

GASKET-EXH
MANIF

1

N/A

12626354

GASKET-INT
MANIF

8

N/A

Refer to EPC

SEAL, EXH SYS

1

N/A

12619787

GASKET-VLV RKR
ARM CVR

1

N/A

12623308

GASKET-F/
PMP BRKT

1

N/A

12668553

SEAL KIT-F/INJR
(O RING)

2

N/A

Refer to EPC

PIPE, FUEL FEED
INTER

1

Refer to EPC

PIPE, FUEL FEED
INTER (from PUMP
to
CROSSRAIL LINE)

1

N/A

N/A

4250109

1. Use vice grips with a slide hammer.

4921302

Note: Be sure NOT to pry on the sealing surface of the
block, as shown in the illustration above.
2. Use vice grips with a small pry bar.
Typically, one of the above approved processes will
remove the lifter that is stuck in the bore. If not, the
engine will need to be replaced.
With the lifter removed, be sure to inspect the bore for
any damage. Typically, the lifter bores will look good
with no indication of damage.
Note: Refer to Service Bulletin # 20-NA-038 for
additional information on AFM and DFM usage.

N/A

Bulletin No.: 15-06-01-002M

January, 2023

Page 3

Warranty Information
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
9.4 hrs (Silverado, Sierra)
14.8 hrs (CTS-V)

4080978*

Valve Lifter Oil Manifold and Valve Lifter Left Side
Replacement

9.2 hrs (Escalade, Suburban, Tahoe, Yukon)
11.7 hrs (Corvette)
7.0 hrs (Camaro)
10.9 hrs (Silverado, Sierra)
15.5 hrs (CTS-V)

4080988*

Valve Lifter Oil Manifold and Valve Lifter Right Side
Replacement

9.3 hrs (Escalade, Suburban, Tahoe, Yukon)
11.4 hrs (Corvette)
9.0 hrs (Camaro)

*This is a unique Labor Operation for bulletin use only.

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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