22-NA-171

Bulletin No.:
Service Bulletin
Date:
22-NA-171
January, 2023
TECHNICAL
Subject:
Malfunction Indicator Lamp (MIL) Illuminated On the Driver Information Center (DIC) DTC’s P0171 and/or P0174 Set
Brand:
Model:
Chevrolet
Colorado
GMC
Canyon
Model Year:
VIN:
from
to
from
to
2017
2022
-
-
Engine:
Transmission:
3.6 (LGZ)
-
Involved Region or Country
North America, GM Korea Company
Condition
Some customers may comment that the MIL is illuminated.
Some technicians may find one or more of the following DTCs set in the Engine Control
Module (ECM):
• P0171: Fuel Trim System Lean Bank 1
• P0174: Fuel Trim System Lean Bank 2
Cause
6137633
This condition may be caused by possible cracked/failed rubber intake boot.
Note: Do Not to remove engine cover when performing leak check.
Correction
Copyright 2023 General Motors LLC. All Rights Reserved.
Inspect rubber boot for cracking or weld failure:
• If the intake boot is found to have cracking or weld failure. Refer to the Service
Procedure below.
• If the intake boot is found to be in working condition. Refer to SI for further diagnostics.
Page 2
January, 2023
Bulletin No.: 22-NA-171
Important: Service agents must comply with all
International, Federal, State, Provincial, and/or
Local laws applicable to the activities it performs
under this bulletin, including but not limited to
handling, deploying, preparing, classifying,
packaging, marking, labeling, and shipping
dangerous goods. In the event of a conflict between
the procedures set forth in this bulletin and the
laws that apply to your dealership, you must follow
those applicable laws.
Service Procedure
Refer to Air Cleaner Outlet Duct Replacement in SI.
Parts Information
Causal
Part
Description
Part
Number
Qty
X
DUCT/ A/
CL OTLT
84535596
1
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
4020690
Description
Labor Time
Air Cleaner Outlet Duct Replacement
Use the Published Labor
Operations Time
Version
1
Modified
Released January 19, 2023
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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