# Service bulletin 14616 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. - Type: Service bulletin - NHTSA id: 10090217 - Published by NHTSA: 2017\-02\-02 - Manufacturer's number: 14616 - Manufacturer's date: 2014\-11\-07 - NHTSA component: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\) ## NHTSA's summary 14616 \- SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPROGRAM THE TRANSFER CASE CONTROL MODULE ON CERTAIN VEHICLES EQUIPPED WITH RPO NQH TRANSFER CASE. THESE VEHICLES MAY EXHIBIT A SERVICE 4WD MESSAGE WHEN STARTING THE VEHICLE AFTER IT HAS BEEN TURNED OFF WITH THE TRANSFER CASE CONTROL KNOB SET IN AUTO 4WD. ## The document No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number. ## Components Transmission and driveline, Transfer case ## Vehicles listed - 2015 CADILLAC ESCALADE - 2015 CADILLAC ESCALADE ESV - 2015 CHEVROLET SILVERADO 1500 - 2015 CHEVROLET SUBURBAN - 2015 CHEVROLET TAHOE - 2015 GMC SIERRA 1500 - 2015 GMC YUKON - 2015 GMC YUKON XL ## Recalls for the same vehicles and component - [26V289000](/recalls/nhtsa/26V289000.md), 2026-05-07: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\) - [14V374000](/recalls/nhtsa/14V374000.md), 2014-06-27: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\) ## Other bulletins for the same vehicles and component - [14192A](/bulletins/10248736.md), 2024-01-16, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). Unwanted Transfer Case Shift to Neutral - [14192](/bulletins/10248735.md), 2024-01-16, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). Unwanted Transfer Case Shift to Neutral - [19NA136](/bulletins/10186069.md), 2021-02-01, Service bulletin: PARKING BRAKE; EQUIPMENT; POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). 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. - [19NA136](/bulletins/10163252.md), 2019-07-29, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); EQUIPMENT ADAPTIVE/MOBILITY. This technical bulletin provides a procedure to change the diff fluid if found the cause of the customers concern. - [PIP3366C](/bulletins/10143757.md), 2018-08-20, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); POWER TRAIN:AUTOMATIC TRANSMISSION. 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\&\#39;s are advised this condition should be deemed a normal characteristic of 4WD low operation. - [PIP5250C](/bulletins/10139310.md), 2018-06-04, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). This Preliminary Information communication provides information to the technician about vehicles that may have a Service 4WD message on the Driver Information Center when operated below 10 degrees Fahrenheit \(\-12 Celsius\). Technician may find C0398 or C0326 stored in the Transfer Case Control Module. For vehicles with Regular Production Option Code NQH and NQ6 and only setting Diagnostic Trouble Codes C0398 or C0398 and C0326 the replacement of the actuator motor will correct the concern. Dealer will need to contact General Motors Product Quality Center for further assistance. - [060089026N](/bulletins/10139278.md), 2018-06-04, Service bulletin: ELECTRICAL SYSTEM; VISIBILITY:SUN/MOON ROOF ASSEMBLY; STRUCTURE:BODY:DOOR; POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); VISIBILITY:WINDSHIELD; ELECTRONIC STABILITY CONTROL \(ESC\). This warranty bulletin provides labor operation numbers for customer concerns that cant be duplicated. - [PIP5304](/bulletins/10115071.md), 2017-08-15, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); ELECTRICAL SYSTEM. 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. - [PIP5250](/bulletins/10114804.md), 2017-08-15, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\); ELECTRICAL SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that may have a Service 4WD message on the Driver Information Center. Technician may find C0398 or C0326 stored in the Transfer Case Control Module. Technician should reprogram the Transfer Case Control Module using Service Programming System for the updated calibrations to resolve this concern. - [PIP5245](/bulletins/10114727.md), 2017-08-15, Service bulletin: POWER TRAIN:TRANSFER CASE \(4\-WHEEL DRIVE\). 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. JSON: [/v1/bulletins/10090217](/v1/bulletins/10090217) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2014616&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10090217&vehicle=Service%20bulletin%2014616)