22-NA-027

Service Bulletin
Bulletin No.:
22-NA-027
Date:
April, 2022
TECHNICAL
Subject:
LM2 Diesel With Possible Oil Consumption - DTC P06DD Set
The bulletin replaces PIP5762. Please discard PIP5762.
Brand:
Model:
Cadillac
to
Escalade Models
2021
2022
Silverado 1500
2020
2021
2022
2022
2021
2022
Sierra 1500
2020
2021
Sierra 1500 (LIMITED, RPO J21,
12th VIN Digit = 4
or less)
2022
2022
2021
2022
Silverado 1500 (LTD, RPO J21, 12th
VIN Digit = 4 or less)
Chevrolet
Silverado 1500 (RPO J22, 12th VIN
Digit = 5 or greater)
Suburban
Tahoe
GMC
Model Year:
from
Sierra 1500 - (RPO
J22, 12th VIN Digit =
5 or greater)
Yukon Models
Copyright 2022 General Motors LLC. All Rights Reserved.
VIN:
from
Engine:
to
LM2
Transmission:
Page 2
April, 2022
Bulletin No.: 22-NA-027
Involved Region or Country
North America, Russia, Middle East, Chile (West), Colombia (West), Ecuador (West),
Paraguay (West), Peru (West), Japan, Cadillac Korea (South Korea), Thailand (ASEAN),
Australia/New Zealand
Condition
Some customers may comment on oil consumption.
Some technicians may find DTC P06DD set.
Cause
Camshaft housing (cover) may have a baffle plate weld that is not adequate.
5671019
Correction
5671020
• If the serial number is greater than 21298JDXXX, this bulletin does not apply. Refer to
bulletin 21-NA-272 and SI for appropriate diagnostics.
• If the serial number is less than 21298JDXXX and the customer's concern is oil
consumption:
1. Replace the camshaft housing cover.
2. Replace the #2 glow plug.
Re-evaluate the oil consumption.
Bulletin No.: 22-NA-027
April, 2022
Page 3
Service Procedure
Refer to Camshaft Housing Replacement in the Service
Manual and Glow Plug Replacement - Cylinder 2 in the
Service Manual.
Parts Information
Use the vehicle identification number (VIN), SI, and the
GM Electronic Parts Catalog to determine the correct
part to order.
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
4087688*
Description
Replace Camshaft Housing
and Glow Plug
Model
Labor Time
Silverado 1500
Sierra 1500
8.1 hr
Escalade Models
Suburban
Tahoe
Yukon Models
12.2 hr
*This is a unique Labor Operation for Bulletin use only.
Version
2
Modified
Released February 02, 2022
Revised April 19, 2022 - Update Cell-Link in Service Procedure and Update Labor Time
in Warranty Information section.
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.
WE SUPPORT VOLUNTARY
TECHNICIAN
CERTIFICATION