NHTSA ID Number: 10227798
Manufacturer Communication Number: 21-NA-149
TSB/Document Date: 2022-12-15
Summary
This technical bulletin provides repair information to correct a customer concern of Engine Wire Harness Chafing.
December, 2022
Page 15
5583328
5583329
The cause of the condition may be an engine wire harness clip was removed during
production due to ergonomic issues (hand clearance and branch stiffness). This led to an
uncontrolled branch that came into contact with a sharp edge (1) & (2) on the ECM/TCM
bracket, driver side upper control arm, and/or shock tower and caused chaffing during
engine vibration and roll.
This Correction pertains to vehicles equipped with engine 2.7L, L3B only.
Correction 1
Caution: This Document Only Applies To VINs NOT Covered by Customer Satisfaction
Program N192219370 Please Verify In VIS Before Proceeding
If engine wiring harness contact is isolated during inspection, use a seam ripper type tool
to carefully inspect for internal wiring damage.
If found, repair the damaged wiring following the SI wire to wire repair procedures.
Once the engine wiring harness inspections or repairs have been made, perform the
following updates to the engine wiring harness.
Protect the engine wiring harness from future damage at the ECM Bracket.
Install a Zip Tie Fir Tree Clip GM PN 84389052, 28 millimeters below the branch break
out from above as shown below.
Page 16
December, 2022
Bulletin No.: 21-NA-149
5810432
Insert the Zip Tie style Fir Tree Clip into the location shown below in the ECM Mounting
Bracket.
5810431
Zip Tie Fir Tree Clip installed securing the harness as show below.
Bulletin No.: 21-NA-149
December, 2022
Page 17
5810433
Protect the engine wiring harness from future damage at Generator Bracket.
Zip Tie style Fir Tree Clips are located on the plastic Channel at #1 and on the Generator
Bracket at #2 shown below
5810435
Measure up 155 mm from the Zip Tie style Fir Tree Clip located on the plastic Channel.
Install the Kevlar Velcro Sleeve PN 84820678 155 mm up the engine wiring harness as
shown below to ensure that the sleeve extends 25mm above the Zip Tie style Fir Tree
Clip located at the Generator Bracket as shown below.
Tape both ends of the Kevlar Velcro Sleeve with Woven Polyester (PET) Electrical/AntiAbrasive Tape using KENT® AUTOMOTIVE 1089482 to secure in place.
Page 18
December, 2022
Bulletin No.: 21-NA-149
5810434
Install the updated Zip Tie style Fir Tree Clip GM PN 13596790 in the Generator Bracket
as shown below.
5810436
Protect the engine wiring harness from future damage at the top of the Camshaft Carrier
Cover in the area shown below (1).
Install Kevlar Velcro Sleeve PN 84826758 and tape both ends with Woven Polyester
(PET) Electrical/Anti-Abrasive Tape using KENT® AUTOMOTIVE 1089482 to secure in
place.
Bulletin No.: 21-NA-149
December, 2022
Page 19
5812564
This Correction pertains to vehicles equipped with engine 4.3L, LV3 only.
Note: The first graphic below is a before, and after (2), repair example of harness
chaffing at the Oil Dipstick bracket.
Correction 2
5911722
Page 20
December, 2022
Bulletin No.: 21-NA-149
5412204
5412208
To correct this concern, repair the damaged wiring following the SI wire-to-wire repair
procedures. Once repaired, protect and reposition the engine wiring harness to prevent
future harness damage.
Correction 3
This Correction pertains to vehicles equipped with engine 3.0L, LM2 only.
Inspect areas designated by the graphics and call-outs in Cause # 3.
In many cases, the ECM has been unnecessarily replaced for these concerns. Please
thoroughly inspect the areas shown above and follow published SI diagnostics before
any parts are replaced. If any concerns are found, then follow SI Wiring and Connector
repair instructions to correct the concern.
Correction 4
This Correction pertains to vehicles equipped with engines 5.3L L82, 5.3L L84, 6.2L
L87, 4.3L LV3, 2.7L L3B, or 3.0L LM2.
Utilizing Engine Harness sleeves, anti-abrasion tape, and zip-ties to secure the harness
away from one or more of the chaffing points. Follow the Service Procedure steps below.
1. Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
2. Remove driver side tire and wheel and driver wheelhouse liner. Refer to Tire and
Wheel Removal and Installation, and Front Wheelhouse Liner Replacement in SI.
Bulletin No.: 21-NA-149
December, 2022
Page 21
5868341
3. Locate the three contact points where the wire harness is chaffing, the ECM/TCM
black bracket (1), the upper control arm (2), and the shock tower bolt (3).
Page 22
December, 2022
Bulletin No.: 21-NA-149
5868349
4. At the ECM/TCM bracket, locate the wire harness laying against the ledge (1).
Bulletin No.: 21-NA-149
December, 2022
Page 23
5868350
5. Wrap the wire harness with the shorter Engine Harness Sleeve then utilizing zip ties
and two small holes in the bracket (1).
Page 24
December, 2022
Bulletin No.: 21-NA-149
5868352
6. Secure the harness snug to the bracket to prevent movement.
Bulletin No.: 21-NA-149
December, 2022
Page 25
5868355
7. At the upper control arm (1), secure the harness away from control arm (example
above shows harness in the correct position, unwrapped).
Page 26
December, 2022
Bulletin No.: 21-NA-149
5868357
8. Wrap the harness in the shorter Engine Harness Sleeve then wrap with
anti-abrasion tape secure it to the harness clip above the ECM/TCM bracket (1) to
keep out of the way of the upper control arm.
Bulletin No.: 21-NA-149
December, 2022
Page 27
5868359
9. At the shock tower point there is a wire harness canal (1).
Page 28
December, 2022
Bulletin No.: 21-NA-149
5868358
Bulletin No.: 21-NA-149
December, 2022
Page 29
5868362
10. Using the long Engine Harness Sleeve, wrap the harness and secure it snug to the
canal using zip-ties.
Page 30
December, 2022
Bulletin No.: 21-NA-149
5868367
11. Verify the wire harness is wrapped and secured at all three points, the ECM/TCM
Bracket (1), Upper Control Arm (2), and the Shock Tower (3). Then reassemble the
vehicle.
12. Reinstall the front wheelhouse liner and tire and wheel. Refer to Front Wheelhouse
Liner Replacement and Tire and Wheel Removal and Installation in SI.
13. Remove the support and lower the vehicle.
Bulletin No.: 21-NA-149
December, 2022
Page 31
Parts Information
Parts Information
Correction 1
Correction 4
Causal
Part
N/A
Part Number
Description
Qty
KENT®
AUTOMOTIVE
1089482
Woven
Polyester (PET)
Electrical/AntiAbrasive Tape
1
84389052
3
84820678
KEVLAR
VELCRO
SLEEVE
1
84826758
KEVLAR
VELCRO
SLEEVE
1
13596790
Causal
Part
Description
KENT®
AUTOMOTIVE
1089482
N/A
1
Part
Number
Qty
Woven
Polyester
(PET)
Electrical/
AntiAbrasive
Tape
Engine Harness
Sleeve
84820678
Engine Harness
Sleeve
84826758
Tie Strap
12337820
Black Push Pin
Tie Strap
84396606
As needed
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
5480728*
Inspect Harness for Chafing and Damage and Repair
Correction 1
1.2 hr
5486188*
Correction 2 and 3
For vehicles repaired under
warranty, submit the
appropriate labor operation
for the repair performed.
Wrap and Secure Engine Wire Harness - Correction 4
1.3 hr
*This is a unique Labor Operation for Bulletin use only.
Additional SI Keywords
C15AA, P171B, P281B, P001A, P2B00, P2B01,
P2B03, P2B96, P001B, P003D, P0107, P018C,
P01E5, P01E6, P01E7, P0237, P0300, P0340, P0341,
P0355, P0365, P037C, P03F0, P0480, P06DA,
P06DB, P06DD, P0621, P0622, P0521, P0522, P0532,
P0P0616, P0691, P0692, P0711, P0712, P077C,
P07BF, P0707, P0960, P0962, P0963, P0964, P0966,
P0967, P0968, P0970, P0971, P1101, P112F, P146D,
P159F, p16A0, p16A2 , P176C, P2122, P26E5, P2812,
P2814, P2B53, P2C05, P2C08, P2C09, P2C0C,
P2C0D, P2C10, P2C12, P2C15, P2C16, P2C19,
P305E, P3084, P3089, P308E, P3093, P3094, P3095,
P3098, P30B0, P30B3, P30CF, P0010, P0011, P0013,
P0014, P0016, P0017, P001A, P001B, P001C, P002A,
P002B, P002C, P0030, P0031, P0032, P0033, P0033,
P0034, P0035, P0036, P0037, P0038, P0054, P0068,
P0089, P0090, P0091, P0092, P0096, P0097, P0098,
P0099, P00C6, P00C8, P00C9, P00CA, P00E9,
P00EA, P00EB, P00EC, P00F4, P00F5, P00F6,
P0101, P0102, P0103, P0106, P0107, P0108, P0111,
P0112, P0113, P0114, P0117, P0118, P0119, P0121,
P0121, P0122, P0122, P0123, P0123, P0131, P0131,
P0132, P0132, P0135, P0137, P0141, P015A, P015A,
P015B, P015B, P0182, P0183, P0187, P0188, P018C,
P018D, P0191, P0192, P01E5, P01E6, P01E7, P0201,
P0202, P0204, P0222, P0222, P0223, P0223, P0237,
P0238, P0245, P0246, P0261, P0262, P0264, P0265,
P0267, P0268, P0270, P0271, P0324, P0325, P0326,
P0327, P0328, P0330, P0331, P0332, P0333, P0335,
P0340, P0341, P0351, P0352, P0353, P0354, P0365,
P0366, P03EC, P03ED, P03EE, P03F1, P03F2,
P03F3, P0443, P0449, P0451, P0452, P0453, P0454,
P0458, P0459, P0498, P0499, P057B, P057D, P057D,
P057E, P0606, P0641, P0650, P0651, P0685, P0686,
P0687, P0689, P0690, P0697, P06A3, P06B6, P06B7,
P1007, P1029, P102A, P102B, P1038, P103A, P103B,
P103C, P1096, P1097, P109F, P10A0, P10A1, P10A2,
P10E8, P1101, P111F, P1176, P1177, P1178, P1179,
P118A, P11C9, P1248, P1249, P124A, P124B, P126E,
P126F, P127C, P128A, P128B, P129D, P135A, P1469,
P146A, P146D, P146E, P148E, P148F, P157A, P1682,
P16A0, P16A0, P16A1, P16A1, P16A2, P16A2,
P16A7, P16AF, P16B3, P16D7, P16D8, P16D9,
Page 32
December, 2022
Bulletin No.: 21-NA-149
P16E4, P16E5, P20C5, P20C8, P2088, P2089, P2090,
P2091, P2122, P2123, P2127, P2128, P2135, P2135,
P2138, P2147, P2148, P2150, P2151, P2153, P2154,
P2156, P2157, P2184, P2185, P2186, P2227, P2228,
P2229, P2230, P2237, P2237, P223C, P223C, P223E,
P223E, P2243, P2243, P2, P2251, P227C, P227D,
P227E, P228C, P228D, P2300, P2301, P2303, P2304,
P2306, P2307, P2309, P2310, P2626, P263A, P263B,
P26B7, P2718, P2720, P2721, P2727, P2729, P2730,
P281D, P281E, P2736, P2738, P2739, P2812, P2814,
P2815, P2824, P2826, P2827, P2AB8, P2AB9, P2AFE,
P2AFF, P2B2D, P2B2E, P2B33, P2B34, P2B35,
P2B39, P2B39, P2B3B, P2B81, P2B93, P2BB4,
P2BB5, P2BB8, P2BB9, P2BBA, P2C05, P2C06,
P2C07, P2C08, P2C09, P2C0A, P2C0B, P2C0F,
P2C10, P2C12, P2C13, P2C14, P2C15, P2C16,
P2C17, P2C18, P2C19, P2C9B, P30CE, P3080,
P3081, P3082, P3085, P3086, P3087, P308A, P308F,
P3091, P3094, P3095, P3096, P3099, P309B, P30B0,
P30B1, P30B2, P30B3, P30BE, P30BF, P30C2,
P30C3, P30C6, P30C7, P30CA, P30CB, PIT5677,
PP308C, U0073, U0617, U060F, U0644, U111A,
U1346, F47UA, P0404, P0476, P048A, P28F7, P140B,
U0606, U0607, P305B, P1007, B2B0E, P2535.
Version
8
Modified
Released September 17, 2021
Revised October 22, 2021 – Added Information from Field Action Investigation to
Condition/Cause/Correction # 2 and Repair Information from PIT5742 to Condition/
Cause/Correction # 4.
Revised November 08, 2021 – Added Exhaust Pressure Differential Sensor Connector
Repair to Cause # 3, LM2 Only Section.
Revised January 05, 2022 – Added a Graphic to the Cause #3 Section, Added 2
Graphics to the Cause #4 Section, and Updated the Warranty Information.
Revised February 01, 2022 – Added 2022 Model Year, Added 5 DTC’s to Condition #3.
Revised May 09, 2022 – Removed 2022 Silverado and Sierra 1500 - (RPO J22) Models.
Revised October 10, 2022 – Added Important to Start of Document, Corrected Graphic
and Text in Cause # 2, Corrected First Graphic in Cause # 3, Realigned Text and Moved
Graphics from Correction # 3 to Cause #3, Removed Graphics from Correction # 3 and
Added Leading Sentence.
Revised December 07, 2022 – Added 2023 Model Year, and L87 and L84 Engine RPO’s
to the T1 SUV’s.
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
- Formulated for engines with 75,000 miles or more, Valvoline...
- Delivers 20% better wear protection and 15% better sludge...
- Extra detergents safeguard against friction, corrosion and...
- Advanced friction-fighting additives help maximize...
- Provides performance benefits for high mileage, new and...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 21-NA-149
Replacement Service Bulletin Number:
MFR Communication Date: 2022-12-08
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
Last update on 2026-07-09 / Affiliate links / Images from Amazon Product Advertising API
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA
Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU c0ding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations - 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Pr0gramming): Allows for Ford, for Lincoln, and for Mazda ECU pr0gramming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- 39+ Services/Resets/Adaptations/Relearns/Calibrations: XTOOL D7S full system car scanner diagnostic tool tackles 99% of common car issues through its 36+ special functions, including Oil Reset, EPB, SAS, BMS, Throttle Reset, Injector C0ding, ABS Bleed, TPMS Reset, Power Balance, etc and also covers specific-vehicle functions like Crank Sensor Relearn, ABS Initialization, Cylinder Power Balance, Fuel Trim Reset, Idle Relearn etc. This car diagnostic scanner enhances efficiency, making repairs and maintenance hassle-free. Tip: DO NOT for All vehicles, please check compatibility first
- Cost-effective ECU C0ding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
Last update on 2026-07-08 / Affiliate links / Images from Amazon Product Advertising API
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
Last update on 2026-07-09 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.