NHTSA ID Number: 10144458
Manufacturer Communication Number: PIP5304B
Summary
This Preliminary Information communication provides information to the technician about vehicles that have a “Service 4WD Message” displayed in the Driver Information Center. Technician may find Diagnostic Trouble Codes C0392 or C0396. Technician should check the terminal tension on the Transfer Case
Control Module X1 connector. Technician should repair any terminal that have poor terminal tension.
Condition / Concern
Some customers may comment on a “Service 4WD Message” displayed in the Driver Information Center (DIC).
Technicians may find DTC C0392 or C0396 set as active or history code. Vehicles with C0392/C0396 may also set a C0398. The C0398 is the result of the C0392 or C0396 and once those codes are corrected the C0398 should be corrected.
Recommendations / Instructions
Based on returned part analysis, warranty data review and engineering investigation, it has been identified that there may be one or more terminals in the TCCM X-1 connector that may have poor tension.
Related to C0392 cavities 1, 2 and 9 would set this DTC but we are seeing cavity 9 being the terminal in question. Related to C0396 Terminals 3,5,10,11 with terminal 3 being the suspect.
Technician may be able to lightly wiggle the harness at the X-1 connector and cause the code to set or clear depending on connection.
Please test terminal tension in the TCCM X-1 connector cavities 1,2 and 9 for C0392 and cavities 3,5,10,11 for C0396 and repair as needed prior to performing published diagnostics that could lead to unneeded part replacement.
When checking for proper terminal tension carefully insert diagnostic test probe J-35616-2A (GY) into terminal in question and the test probe should not fall out under its own weight.
Caution: Do not insert test equipment probes (DMM etc.) into any connector or fuse block terminal. The diameter of the test probes will deform most terminals. A deformed terminal will cause a poor connection, which will result in a system failure. Always use the EL-35616 GM Approved Terminal Test Probe Kit in order to front probe terminals. Do not use paper clips or other substitutes to probe terminals.
Caution: When using the EL-35616 GM Approved Terminal Test Probe Kit, ensure the terminal test adapter choice is the correct size for the connector terminal. Do not visually choose the terminal test adapter because some connector terminal cavities may appear larger than the actual terminal in the cavity. Using a larger terminal test adapter will damage the terminal. Refer to the EL-35616 GM Approved Terminal Test Probe Kit label on the inside of the EL- 35616 GM Approved Terminal Test Probe Kit for the correct adapter along with the connector end view.
Parts Information
Use the vehicle identification number (VIN) and the GM Electronic Parts Catalog to determine the correct part to order, see HARNESS, AUX FUSE BLK WRG in the EPC.
26 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
| CADILLAC | ESCALADE | 2015-2018 |
| CHEVROLET | SILVERADO | 2017 |
| CHEVROLET | SILVERADO 1500 | 2014 |
| CHEVROLET | SILVERADO 2500 | 2015-2016, 2018 |
| CHEVROLET | SUBURBAN | 2015-2018 |
| CHEVROLET | TAHOE | 2015-2018 |
| GMC | SIERRA | 2017 |
| GMC | SIERRA 1500 | 2014-2016 |
| GMC | SIERRA 3500 | 2018 |
| GMC | YUKON | 2015-2018 |
1 Associated Document
Manufacturer Communications
Bulletin No.: PIP5304B
Published date: 08/14/2018
NHTSA ID Number: 10083125
Manufacturer Communication Number: PIP5304A
Summary
THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ABOUT VEHICLES THAT HAVE A “SERVICE 4WD MESSAGE” DISPLAYED IN THE DRIVER INFORMATION CENTER. TECHNICIAN MAY FIND DIAGNOSTIC TROUBLE CODES C0392 OR C0396. TECHNICIAN SHOULD CHECK THE TERMINAL TENSION ON THE TRANSFER CASE CONTROL MODULE X1 CONNECTOR. TECHNICIAN SHOULD REPAIR ANY TERMINAL THAT HAVE POOR TERMINAL TENSION.
1 Associated Document
Service Bulletin Document
Bulletin No.: PIP5304A
Date: Aug-2016
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SEOCONTENT-START
Bulletin No.: PIP5304B Published date: 08/14/2018
Preliminary Information PIP5304B Service 4wd Message With DTC C0392 or C0396 Stored In TCCM
Models Brand: Chevrolet GMC
Chevrolet Chevrolet GMC
Cadillac Model: Silverado Sierra Suburban Tahoe Yukon Escalade Model Years: 2014 – 2018
2014 – 2018
2015 – 2018
2015 – 2018
2015 – 2018
2015 – 2018 VIN:
from to
All All
All All
All All
All All
All All
All All All All All All All All Engine: All All All All All All Transmissions: Equipped with 4wd RPOs NQH or NP0 Supersession Statement
This PI was superseded on to add model years, please discard PIP5304A.
Condition / Concern
Some customers may comment on a “Service 4WD Message” displayed in the Driver Information Center (DIC).
Technicians may find DTC C0392 or C0396 set as active or history code. Vehicles with C0392/C0396 may also set a C0398. The C0398 is the result of the C0392 or C0396 and once those codes are corrected the C0398 should be corrected.
Recommendations / Instructions
Based on returned part analysis, warranty data review and engineering investigation, it has been identified that there may be one or more terminals in the TCCM X-1 connector that may have poor tension.
Related to C0392 cavities 1, 2 and 9 would set this DTC but we are seeing cavity 9 being the terminal in question. Related to C0396 Terminals 3,5,10,11 with terminal 3 being the suspect.
Technician may be able to lightly wiggle the harness at the X-1 connector and cause the code to set or clear depending on connection. Please test terminal tension in the TCCM X-1 connector cavities 1,2 and 9 for C0392 and cavities 3,5,10,11 for C0396 and repair as needed prior to performing published diagnostics that could lead to unneeded part replacement.
When checking for proper terminal tension carefully insert diagnostic test probe J-35616-2A (GY) into terminal in question and the test probe should not fall out under its own weight. Caution: Do not insert test equipment probes (DMM etc.) into any connector or fuse block terminal. The diameter of the test probes will deform most terminals. A deformed terminal will cause a poor connection, which will result in a system failure. Always use the EL-35616 GM Approved Terminal Test Probe Kit in order to front probe terminals. Do not use paper
clips or other substitutes to probe terminals. Caution: When using the EL-35616 GM Approved Terminal Test Probe Kit, ensure the terminal test adapter choice is the correct size for the connector terminal. Do not visually choose the terminal test adapter because some connector terminal cavities may appear larger than the actual terminal in the cavity. Using a larger terminal test adapter will damage the terminal. Refer to the EL-35616 GM Approved Terminal Test Probe Kit label on the inside of the EL- 35616 GM Approved Terminal Test Probe Kit for the correct adapter along with the connector end view.
Parts Information
Use the vehicle identification number (VIN) and the GM Electronic Parts Catalog to determine the correct part to order, see HARNESS, AUX FUSE BLK WRG in the EPC.
Warranty Information
For vehicles repaired under warranty please use: Labor Operation 5430940 Description Harness Replacement Labor Time Use Published Labor Time Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
© 2018 General Motors. All Rights Reserved.
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SEOCONTENT-END
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