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Service bulletin PIE0349A

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10201135
Published by NHTSA2021-09-07
Manufacturer's numberPIE0349A
Manufacturer's date2015-12-01
NHTSA componentPOWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE); ELECTRICAL SYSTEM

NHTSA's summary

Engineering Information - Service 4WD Messange Displayed and DTC C0398 - Equipped with Switch activated transfer case (RPO NQH)

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Transmission and driveline, Transfer case

Trouble codes named

C0398

Vehicles listed
CHEVROLET SILVERADO 15002016 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2016
CHEVROLET TAHOE2016
GMC SIERRA 15002016 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON2016
GMC YUKON XL2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V2890002026-05-07. POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
PIE03492021-09-07. Service bulletin. Engineering Information - Service 4WD Messange Displayed and DTC C0398 - Equipped with Switch activated transfer case (RPO NQH)
PIE0349A2021-04-26. Service bulletin. Engineering Information – Service 4WD Message Displayed and DTC C0398
19NA1362021-02-01. Service bulletin. This service bulletin provides a diagnostic procedure to aid in correcting a customer concern of a Howling, Whining/Whirring Noise, Shudder/Vibration and/or Grinding Noise While in 4HI, 4HI Auto and/or During Parking Lot Maneuvers in Auto Mode.
19NA1362019-07-29. Service bulletin. This technical bulletin provides a procedure to change the diff fluid if found the cause of the customers concern.
PIP3366C2018-08-20. Service bulletin. This Preliminary information communicates to the dealer technician thatLight Duty Trucks equipped with automatic transmissions and 4 wheel drive may exhibit a condition of grinding/ratcheting type noise when shifting the automatic transmission into park while the transfer case is in 4 wheel drive low (4LO) range. Dealers technician's are advised this condition should be deemed a normal characteristic of 4WD low operation.
060089026N2018-06-04. Service bulletin. This warranty bulletin provides labor operation numbers for customer concerns that cant be duplicated.
PIP5261A2017-03-21. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN THAT SOME VEHICLES MAY HAVE A HIGH PITCHED WHINE NOISE FROM THE VEHICLE NOTICED WHEN DRIVING IN AUTO 4WD. WHEN THE TRANSFER CASE CONTROL MODULE HAS TO MOVE THE TRANSFER CASE ACTUATOR MOTOR THE HIGHER CURRENT PASSING THROUGH THE MODULE CAUSES AN "ELECTRONIC BUZZ OR WHINE" WITHIN SOME OF THE CAPACITORS IN THE MODULE THAT CAN BE HEARD BY SOME OF OUR CUSTOMERS. THIS CAN ONLY BE HEARD WITH ALL ACCESSORIES AND HVAC OFF AND ONLY WHEN ACTUATOR MOVEMENT IS REQUIRED. THIS DOES NOT INDICATE A CONCERN WITH THE MODULE AND SHOULD NOT BE REPLACED TO ADDRESS THIS CONCERN.
PIP5245A2017-03-21. Service bulletin. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON HOW TO DIAGNOSE VEHICLES WITH VARIOUS NOISES ASSOCIATED WITH FOUR WHEEL DRIVE OPERATION. BEFORE BEGINNING ANY DIAGNOSIS IT IS IMPERATIVE TO REVIEW THE SYMPTOMS - TRANSFER CASE IN SERVICE INFORMATION AND PERFORM THE NECESSARY INSPECTIONS. IN ALL CASES THE COMPLAINT VEHICLE SHOULD BE COMPARED TO ANOTHER LIKE VEHICLE BEFORE BEGINNING ANY REPAIRS.
PIP5304A2016-10-20. Service bulletin. 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.
PIE-03622016-08-10. Service bulletin. 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.