20-NA-209
Service Bulletin Details
Public Details for: 20-NA-209
Models from 2022
2022 CHEVROLET SILVERADO 2500 |
2022 CHEVROLET SILVERADO 3500 |
2022 GMC SIERRA 2500 |
2022 GMC SIERRA 3500 |
Models from 2021
2021 CHEVROLET SILVERADO 2500 |
2021 CHEVROLET SILVERADO 3500 |
2021 GMC SIERRA 2500 |
2021 GMC SIERRA 3500 |
Models from 2020
2020 CHEVROLET SILVERADO 2500 |
2020 CHEVROLET SILVERADO 3500 |
2020 GMC SIERRA 2500 |
2020 GMC SIERRA 3500 |
Models from 2019
2019 CHEVROLET SILVERADO 2500 |
2019 CHEVROLET SILVERADO 3500 |
2019 GMC SIERRA 2500 |
2019 GMC SIERRA 3500 |
Bulletin No.: Service Bulletin Date: 20-NA-209 March, 2022 TECHNICAL Subject: Service 4WD Message Illuminated on Driver Information Center (DIC), DTCs C118D, C119B and/or C119C Set Brand: Model: Chevrolet GMC Model Year: from to Silverado 2500HD/3500HD 2019 2022 Sierra 2500HD/3500HD 2019 2022 Involved Region or Country VIN: from Engine: Transmission: All All to North America, Israel, Saudi Arabia, Chile, Australia, New Zealand Additional Options (RPOs) Condition Some customers may comment on seeing a Service 4WD message illuminated in the DIC, Technicians may find DTCs C118D, C119B and/or C119C Set. Cause The cause of the condition may be water intrusion and corrosion within the front differential actuator connector and the electrical harness connector terminals. Correction 5660054 Scan for DTCs and verify if C118D, C119B, and / or C119C are present. If any of the listed DTCs are present, inspect the front drive axle actuator electrical connector for signs of moisture, corrosion at the pins, or damage to the actuator housing. Note: Examples of damage to the actuator housing and the harness connector seal, are shown at the start of the Service Procedure below. Also inspect the electrical wire harness connector for any damage to the internal seal or signs of moisture and corrosion. If any of the listed conditions such as moisture, corrosion, or damage are present on either component, replace BOTH the front drive axle actuator and the electrical wiring harness that connects to the actuator. Copyright 2022 General Motors LLC. All Rights Reserved. Page 2 March, 2022 Service Procedure Bulletin No.: 20-NA-209 Electrical Harness Connector Seal Damage 6017551 6017553 6017555 6017557 Bulletin No.: 20-NA-209 March, 2022 Page 3 Front Drive Axle Actuator Housing Damage 5233270 1. Remove the left front tire and wheel assembly, and the left front wheelhouse liner (3). Refer to Front Wheelhouse Liner Replacement, in SI. Page 4 March, 2022 Bulletin No.: 20-NA-209 5334967 2. Remove the underbody skid shield and the front drive axle actuator (1). Refer to Front Drive Axle Actuator Replacement, in SI. 6017561 6017559 3. Working from the lowest point upward, remove the front drive axle actuator harness assembly. Note the harness routing and original location of the retainers and disconnect the retainer adjacent to the shock mount last. Bulletin No.: 20-NA-209 March, 2022 6017562 Note: There are seven retainers that secure the harness to the vehicle. Page 5 6017566 4. Connect the retainer adjacent to the shock mount first, then route and install the new front drive axle actuator harness. 5334967 5. Install the new front drive axle actuator (1) and reinstall the underbody skid shield. Refer to Front Drive Axle Actuator Replacement, in SI. Page 6 March, 2022 Bulletin No.: 20-NA-209 5233270 6. Reinstall the left front wheelhouse liner (3) and the left front tire and wheel assembly. Refer to Front Wheelhouse Liner Replacement, in SI. 7. Remove the support and lower the vehicle. Parts Information Causal Part Description Part Number Qty X ACTUATOR ASM-FRT DRV AXLE 84756932 1 X HARNESS ASMTRFER CASE SEL SHFT CONT SW W 84801336 1 Bulletin No.: 20-NA-209 March, 2022 Page 7 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 Description Labor Time 3087168* Front Drive Axle Actuator and Electrical Harness Replacement 1.3 hr. *This is a unique Labor Operation for Bulletin use only. Version 2 Modified Released October 23, 2020 Revised March 24, 2022 – Added 2021 and 2022 Model Years, Corrected Some Graphics. 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