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Service bulletin 21-004-13

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 id10215977
Published by NHTSA2022-07-18
Manufacturer's number21-004-13
Manufacturer's date2013-05-10
NHTSA componentELECTRICAL SYSTEM; POWER TRAIN

NHTSA's summary

Flash: Drivetrain Control Module (DCTM) - Transfer Case Operational Enhancements This bulletin involves flashing the Drivetrain Control Module (DCTM) Owners may indicate that they have experienced one or more of the following symptoms:Moaning or groaning noise while coasting and/or during a very light acceleration around 5 to 8 mph (8 to 13 kph).The SERV 4WD message appears and the vehicle shifts from 4WD to 2WD.Binding of the front driveline while turning on steep grades at speeds around 3 to 5 mph (5 to 8 kph).Surge/Shudder at speeds greater than 50 mph (80 kph).

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

Vehicles listed
DODGE DURANGO2011
JEEP GRAND CHEROKEE2011

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

Recalls for the same vehicles and component
19V8130002019-11-14. ELECTRICAL SYSTEM
20173412017-07-10. Electrical
17V4350002017-07-10. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
15V8790002015-12-28. INTERIOR LIGHTING; ELECTRICAL SYSTEM:WIRING
20156152015-12-22. Electrical
20144462014-10-09. Electrical
14V6340002014-10-08. ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR
20143862014-09-09. Electrical
14V5300002014-09-04. ELECTRICAL SYSTEM
20142752014-07-03. Electrical

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

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