22-NA-008 Service Bulletin/Repair Instructions

Bulletin No.:
Service Bulletin
Date:
22-NA-008

February, 2023
TECHNICAL

Subject:
Malfunction Indicator Lamp (MIL) Illuminated, Reduced Engine Power Message on

Drivers Information Center (DIC) - DTCs U060F, U1346, P0101, P0102, P1101 and/or

P14B6 Set

Model Year:
Brand:
Model:
Buick
Encore GX
2020
Chevrolet
Trailblazer

(VIN M)
2021
from
VIN:
to
from
to
2022
SOP
KL4MMDS2XPB000138
Engine:
Transmission:
Involved Region or Country
North America
Condition
Some customers may comment on one or more of the following conditions:

• MIL illuminated

• Reduced Power displayed on DIC

Some technicians may find one or more of the following DTCs set:

• U060F

• U1346

• P0101

• P0102

• P1101

• P14B6

This condition may be caused by a possible broken wire in the harness in circuits 492 of

the multifunction sensor.
Cause
5956039
– The zip tie at the retainer may be pulled too tight and when the harness flexes on

accelerations the wire can break at the zip tie.
Copyright 2023 General Motors LLC. All Rights Reserved.
Page 2
February, 2023
Bulletin No.: 22-NA-008
Inspect the 2nd retainer back from the MAF sensor with the engine running.

If the zip tie is too tight the wire may break at the zip tie during acceleration:
⇒ Wiggle or pull on the harness to induce and identify a break inside the

harness.

⇒ Repair circuit using published wire to wire repair for the MULTIFUNCTION

INTAKE AIR SENSOR (MAF SENSOR).

⇒ Rewrap the wiring harness as required.
Correction
6274274
Important: When replacing the wiring harness to the MAF sensor, The distance from the

fixed clip mounted on the charge air cooler inlet air hose to the fixed clip mounted on the

air cleaner housing must be 85 mm (3.4 in) as indicated in the graphic above, to allow for

proper flex on acceleration.
Service Procedure
Parts Information
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.

Note: It is recommended to replace all the wires in the

harness using the pigtail part numbers listed below.

Refer to Wire to Wire Repair in the Service Manual.
Causal

Part
Description
N/A
CONNECTOR

KIT, BODY

WRG HARN
Part

Number

85519071

(LIH)

85518225

(L3T)
1
Warranty Information

For vehicles repaired under the Bumper-to-Bumper

coverage (Canada Base Warranty coverage), use the

following labor operation. Reference the Applicable

Warranties section of Investigate Vehicle History (IVH)

for coverage information.
Labor Operation
Description
Labor Time
5486278*
Wire to Wire Repair at MAF Harness
1.0 hr
Add
Additional Wire Repair (As Required)
0.2 hr
*This is a unique Labor Operation for Bulletin use only.
Qty
Bulletin No.: 22-NA-008
February, 2023
Page 3
Version
5
Modified
Released January 13, 2022

Revised March 10, 2022 - Added Note in Service Procedure section and added Parts

Information section.

Revised May 25, 2022 - Added VIN Breakpoint.

Revised October 26, 2022 - Update the Labor Time to 1.0 hour.

Revised February 16, 2023 - Added Important Statement and Graphic in the Correction

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

Bestseller No. 1

KINGBOLEN Ediag Elite OBD2 Scanner Bluetooth, Bidirectional Test Scanner All System Diagnostic Tool for iOS & Android, 15+ Hot Reset, CANFD Protocol, FCA AutoAuth, No Subscriptions Lifetime Update

OBD2 Bluetooth Scanner Lifetime Update: Ediag Elite offers revolutionary Advantage Lifetime Updates with unlimited access to the superior 15+ reset service, bidirectional testing and full system diagnostics.The Ediag Elite is an excellent Bluetooth OBD2 scanner diagnostic tool ideal for DIY's and private car owners.
Bidirectional Test for Quickly Locating Problems: The Bidirectional Scan tool allows you to send commands directly from your smartphone to your vehicle for active testing. This feature helps to quickly narrow down problems such as air conditioning clutches, windows, doors, sunroofs, etc., reducing diagnostic time for mechanics and helping DIY users locate faults more easily. In addition, Ediag Elite provides fault analysis and repair guidance to help you solve problems efficiently.
15+ Maintenance Resets: The current version introduces 15+ popular special features: Oil Reset, Headlight Matching, Bleeding Reset, TPMS Reset, BMS Reset, Gear Box Relearn, Throttle Learning, Injector Coding, SAS Reset and more special functions in system diagnose menu. These functions make it easy for owners to carry out the necessary maintenance and servicing, ensuring that your vehicle stays in top condition, prolonging its service life and preventing common problems and breakdowns. Note: The Special function vary by model& year, Reach us check compatibility.
Wide Compatibility CANFD & FCA Autoauth: Compatible with GM, Ford, Toyota, Chrysler, Honda, Mazda, Nissan, Mitsubishi, Hyundai, KIA with standard OBD2 port from 1996 to newer. More car brands and features will be released gradually. Newest Ediag Elite scanner supports CANFD Protocol and FCA cars. Note: Coverage may vary on different vehicle by model& year ,Please contact us to confirm compatibility before purchase.
Perfect for Monitoring The Health of Your Vehicle: Ediag Elite is designed to make vehicle maintenance simple and efficient. With intelligent Auto VIN quick recognition, it is easy to connect to your car without the need for manual input. Real-time data is visualized in a variety of formats, including graphs, numeric, meter displays and clear 4-in-1 data charts, allowing you to effortlessly monitor real-time data. Data logging/reporting is available for playback and further analysis

SaleBestseller No. 2

KINGBOLEN K7 Bidirectional Scan Tool 2026 OBD2 Scanner Bluetooth with Lifetime Updates, No Annual Fees, 31+ Resets, Component Matching, All System Diagnostic, CAN FD, FCA AutoAuth, Crankshaft Relearn

No Annual Fees & 2026 Upgraded CAN FD: Why pay $199/year or more for updates? The 2026 newest Kingbolen K7 obd2 scanner features have been upgraded to Lifetime Updates without subscription fees, saving you significant costs in the long run. K7 scan tool also adds the CAN FD protocol for the latest GM models (2019+), enabling faster data transfer, reducing the risk of undetected errors
2026 Newest Top-tier Car Scanner: Kingbolen K7 diagnostic scan tool is equipped with most capabilities for daily repair/maintenance: Wireless diagnosis via Bluetooth, Bidirectional Test, ECU Online/Offline Code, 31+ Resets, PMI for Ford, Lincoln, Mazda, Global version for 100+ brand vehicles and 17 languages, no area limit, FCA AutoAuth
OE-Level Full Systems Scan Tool: K7 professional diagnostic scanner with Auto Vin can do one-click to scan ECUs on most of vehicles, like pcm, ecm, eps, bcm, tpms, sas, a/c system... to read/clear code, view live data, freeze frame, read ecu info. 4-in-1 data stream graphics can make data viewing more intuitive. Detailed diagnostic reports will help you easily master the car situation as it can be shared by bluetooth or email! Adding workshop information can help your customers to know more
Bidirectional Test/Active Test & ECU Code: Stop guessing and start fixing. Bidirectional scan tool Kingbolen K7 can perform real active test that can send commands to the vehicle's ECU to drive the actuators to work, like window, rear mirrors, sunroof, door, solenoids, wipers, headlamp, etc, helping you quickly find out bad parts and pinpoint faulty issues. K7 bidirectional scanner will be a good choice to save money and time on car repairs when performing complex maintenance and repair
31 Reset Functions: Avoid expensive dealership visits for simple services. Experience tells us that just a small repair service may cost a lot of money. Kingbolen K7 is a professional diagnostic scanner with 31 common maintenance services like Oil /SAS/EPB/TPMS Reset, Battery Matching, ABS Bleeding, Injector Code, etc. It effectively handles most of the car reset and relearning jobs, perfect for experienced DIYers and mechanics. Note: Functions in the menu vary across vehicles. Kindly check the compatibility before purchase

SaleBestseller No. 3

KINGBOLEN OBD2 Scanner S608, 2026 Bidirectional Scan Tool for ABS/SRS/Transmission/Engine, 9 Resets Oil Brake DPF Bleed Gear Injector Throttle BMS SAS, CAN FD & FCA/Renault SGW, Lifetime Free Update

WHY S608 STANDS OUT:2026 Kingbolen S608 is the only scanner <200 bucks that offers powerful active tests on Engine, ABS, SRS, and Transmission systems. Offers 9 resets,Covers 110+ global brands with a 6.2'' larger touchscreen
KINGBOLEN'S NEW BIDIRECTIONAL SCAN TOOL: As the 2026 upgraded version of S600, our Newest S608 obd2 scanner has the powerful Bi-directional Control on Engine, ABS, SRS, and Transmission systems. It can send commands to the ECUs of actuators for functional tests and work status checks, such as ABS, fuel injectors, adjusting throttle, coolant pumps, EVAP test, fuel trim reset, etc. No more Guesswork. Quickly identify problem components without teardown, get fuss-free results in seconds.
【9 HOT RESET SERVICES CAR SCANNER】Tired of costly mechanic trips for common resets? The Kingbolen S608 obd2 scanner lets you do it yourself, even for beginners—quickly and effortlessly! It offers 9 hot reset functions: Oil/EPB Reset, ABS Bleeding, SAS Calibration, DPF Regeneration, Injector Coding, BMS Matching, Throttle Adaptation, Gear Learning. Stop paying mechanics for 5-minute jobs. Save hundreds per year! 🚗*Function vary from vehicle models. reach us to check compatibility firstly!
【4 SYSTEM DIAGNOSTIC TOOL + FULL OBDII FUNCTIONS】Kingbolen S608 is an OBDII scanner and 4 systems diagnostic tool made for home mechanics, DIYers, and professionals. You can access Engine, ABS, SRS, Transmission fault codes, track live data in graphs, and onboard DTC library lookup to find the right troubleshooting procedure, and diagnose with full 10 OBD2 test modes to fix most of emission issues. Give your aging cars routine maintenance to avoid costly repairs, a breakdown, or even a crash.
【NEW CAN FD, FCA/RENAULT SGW, 140+ BRANDS】Kingbolen S608 scanner for car supports 140+ vehicle brands, 100,000+ models, 28 languages and can be used worldwide. S608 stays up-to-date with modern vehicles, allows secure access to 2017+ FCA cars and 2015+ Renault cars (📢*Need to purchase an AutoAuth/Renault account by yourself), and supports the latest CAN-FD protocol for 2019+ GM/Chrysler, enabling 2X faster data transfer and more precise diagnostics. 🚗*Check compatibility before purchase.

This product presentation was made with AAWP plugin.

Last update on 2026-05-12 / Affiliate links / Images from Amazon Product Advertising API

Buffer Email Facebook Flipboard Hacker News LinkedIn Messenger Mix Pinterest Print Reddit SMS Telegram Tumblr X VK WhatsApp Line Xing Threads Bluesky Copy Mastodon Nextdoor