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Service bulletins for the 2016 Chevrolet Suburban

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1780 on file from NHTSA, as of 2026-10-19.

About C0398 on the 2016 Chevrolet Suburban: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: C0398 are shown. Show all

Bulletins, newest first
PIE0349A2021-09-07. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); ELECTRICAL SYSTEM. Engineering Information - Service 4WD Messange Displayed and DTC C0398 - Equipped with Switch activated transfer case (RPO NQH)
PIE03492021-09-07. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); ELECTRICAL SYSTEM. Engineering Information - Service 4WD Messange Displayed and DTC C0398 - Equipped with Switch activated transfer case (RPO NQH)
PIE0349A2021-04-26. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); EQUIPMENT. Engineering Information – Service 4WD Message Displayed and DTC C0398
PIE03492021-04-26. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM. Engineering Information – Service 4WD Message Displayed and DTC C0398 Condition Important: If the customer did not bring their vehicle in for this concern, DO NOT proceed with this EI. Some customers may comment on a “Service 4WD” message displayed. During diagnosis a technician may find DTC C0398 (Range Actuator Position – Range Position Correlation). Cause GM Engineering is attempting to determine the root cause of the above condition. Engineering has a need to gather information on vehicles PRIOR to repair that may exhibit this condition. As a result, this information will be used to "root cause" the customer's concern and develop/validate a field fix.
GCUS-3-8042018-04-02. Service bulletin. ELECTRICAL SYSTEM. 28770 - SUB A ?Service 4WD? message may be displayed on the Driver Information Center and DTC C0398 may be set. Concurrently, the vehicle is permanently locked in 4HI and cannot be shifted shift out of it while the code is present. If the code is cleared, this scenario may repeat if the transfer case is in ?Auto? mode and driven for approx. 2 or more hours. Customers will likely notice that the steering wheel is harder to turn, the engine will feel like it has lost power and the tires may squeal when turning in a parking lot. Dealers are to reprogram the transfer case.
PIE-03622016-08-10. Service bulletin. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE). THIS ENGINEERING INFORMATION BULLETIN IS REQUESTING INFORMATION FROM THE DEALERS ON A CUSTOMER CONCERN THAT A SERVICE 4WD MESSAGE DISPLAYED ON THE DIC AND DTC C0398 SET WITHIN THE TRANSFER CASE CONTROL MODULE.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.