NHTSA ID Number: 10137253
Manufacturer Communication Number: 15-06-01-002B
TSB/Document Date: 2018-05-21
Summary
This technical bulletin provides repair information to correct a customer concern of engine misfire/tick noise, Malfunction Indicator Lamp (MIL) On, DTC P0300 set.
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TSB/Document ID: 15-06-01-002B
Replacement Service Bulletin Number:
MFR Communication Date: 2015-11-24
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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Bulletin No.: 15-06-01-002B
Date: Nov-2015
Subject:
Engine Misfire/Tick Noise, Malfunction Indicator Lamp (MIL) On, DTC P0300 Set
Models:
2015-2016 Cadillac
Escalade
2014 Chevrolet Silverado 1500
2014-2016 Chevrolet Corvette
2015-2016 Chevrolet Silverado, Suburban, Tahoe
2014 GMC Sierra 1500
2015-2016 GMC Sierra, Yukon, Yukon XL
Equipped with 5.3L Engine (RPO L83) or 6.2L Engine (RPO L86, LT1)
Attention:
This Bulletin also applies to any of the above models that may be Export vehicles.
This Bulletin has been revised to add the 2016 Model Year and update the Warranty Information. Please discard Corporate
Bulletin Number 15-06-01-002A.
Condition
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.
Cause
This may be the result of an active fuel management (AFM) lifter that is mechanically collapsed and/or stuck all of the time.
This may be the result of internal locking pin damage in the lifter. Due to oil aeration.
Correction
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 be replaced also.
Parts Information
Part Number
Description
12660737
MANIFOLD ASM-VLV LFTR OIL (SERV KIT)
12623104
GASKET-VLV LFTR OIL UPR MANIF
12645725
LIFTER ASM-VLV (AFM) (4 per Bank)
1
12659260
GASKET-CYL HD (6.2L)
12622325
GASKET-CYL HD (5.3L)
11546959
RIGHT SIDE CYLINDER HEAD BOLTS (10)
11611976
LEFT SIDE CYLINDER HEAD BOLT (1)
11546959
LEFT SIDE CYLINDER HEAD BOLTS (9)
12657093
GASKET-EXH MANIF
12626354
GASKET-INT MANIF (8)
12619787
GASKET-VLV RKR ARM CVR
12623308
GASKET-F/PMP BRKT
12618336
PIPE ASM-FUEL FEED INTER
12618337
PIPE ASM-FUEL FEED INTER
12618338
PIPE ASM-FUEL FEED
12668553
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
4080978*
Valve Lifter Oil Manifold and Valve Lifter Left Side Replacement
9.4 hrs (2014-2016
Silverado, Sierra)
9.2 hrs (2015-2016
Escalade, Suburban,
Tahoe, Yukon)
11.7 hrs (2014-2016
Corvette)
4080988*
Valve Lifter Oil Manifold and Valve Lifter Right Side Replacement
10.9 hrs (2014-2016
Silverado, Sierra)
9.3 hrs (2015-2016
Escalade, Suburban,
Tahoe, Yukon)
11.4 hrs (2014-2016
Corvette)
*This is a unique Labor Operation for Bulletin use only. It will not be published in the Labor Time Guide.
2
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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