NHTSA ID Number: 11028704
Manufacturer Communication Number: PIP6101
TSB/Document Date: 2026-02-11
Summary
The document makes technicians aware of a valvetrain tick noise that is created by one or more soft lifters. The soft lifter concern is due to manufacturing debris within the lifter when it was manufactured. The document instructs the technician to replace the soft lifter(s) and the rocker arm it operates.
Bulletin No.: PIP6101
Service Bulletin
Date: February, 2026
PRELIMINARY INFORMATION
Subject:
Brand:
L3B LK0 Tick Noise Soft Lash Adjuster
Model:
Model Year:
from
VIN:
to
from
Engine:
to
Enclave
2025 - 2026
All
All
2.5 LK0
All
Colorado
2025-2026
All
All
2.7 L3B
All
Traverse
2025-2026
All
All
2.5 LK0
All
Silverado
1500
2025-2026
All
All
2.7 L3B
All
Acadia
2025-2026
All
All
2.5 LK0
All
Canyon
2025-2026
All
All
2.7 L3B
All
Sierra 1500
2025-2026
All
All
2.7 L3B
All
Involved Region or Country
North America
Condition
Top End Ticking Noise.
Cause
Manufacturing debris inside the Stationary Hydraulic Lash Adjuster (SHLA) and not
allowing it to pump up with oil, resulting in a soft lash adjuster.
Correction
Verify the ticking noise is from the valvetrain area by using a stethoscope or other methods.
Remove the camshaft carrier
and inspect for soft stationary hydraulic lash adjusters by pushing down on each of the
followers / rocker arms where it rests on the lash adjusters / SHLA.
Check all of them on intake and exhaust sides.
Replace any soft lash adjusters and the follower it operates.
The video below is an example of a stationary hydraulic lash adjuster / SHLA that is soft .
Parts Information
Description
Part Number
Qty
Adjuster, Hydraulic Valve
Lash
See Parts
Catalog
As Needed
Arm, Exhaust Valve Rocker
See Parts
Catalog
As Needed
Arm, Intake Valve Rocker
See Parts
Catalog
As Needed
Copyright 2026 General Motors. All Rights Reserved.
Page 2
February, 2026
Bulletin No.: PIP6101
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
4061270
Description
Labor Time
Hydraulic Valve Lash
Adjuster Replacement
Use
Appropriate
Time For
Application
Version
1
Modified
02/06/2026 - Created on
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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TSB/Document ID: PIP6101
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-07
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: UNKNOWN OR OTHER
MFR Component System:
MFR Component Subsystem:
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