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Service bulletin PIC-4986

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 id10078726
Published by NHTSA2016-08-16
Manufacturer's numberPIC-4986
Manufacturer's date2016-04-19
NHTSA componentPOWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT; STEERING:GEAR BOX:SHAFT SECTOR; STEERING

NHTSA's summary

THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THAT THE CONDITION IS A NORMAL OPERATING CHARACTERISTIC OF THEIR VEHICLE. A CUSTOMER MAY COMMENT THAT THEY FEEL A STEERING BIND CONDITION WHEN THE CAR IS IN REVERSE, OR DRIVING FORWARD AND THE STEERING WHEEL IS TURNED AT OR NEAR THE FULL-LOCK POSITION.

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

Steering, Transmission and driveline, Differential, Steering gear

Vehicles listed
CADILLAC CTS2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
CADILLAC CTS-V2015 (the catalog's model; the bulletin names a series or trim of it)

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

Recalls for the same vehicles and component
20V0380002020-01-23. POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT

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
PI13362017-08-15. Service bulletin. This preliminary bulletin provides a procedure to install a new rear differential pinion due to lead debri on the pinion seal journal and to correct the customers concern of the rear pinion seal leaking.
10-04-20-001F2017-08-15. Service bulletin. This technical bulletin provides a procedure to replace the rear differential fluid if the rear axle has a clunk or chatter noise on turns.
PIC5936B2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about vehicles that may have the Hazard Flashers turn on after vehicle shut down or that the Glove Box may be open when they return to their vehicle. Technician should replace the Hazard Switch and/or Glove Box Switch (depending on customers concern) with a new designed switch.
PI-13362015-03-27. Service bulletin. CADILLAC: FROM REAR DIFFERENTIAL, THERE IS LEAKING, ON SOME VEHICLES, DUE TO PINION SEAL JOURNAL HAVING LEAD ON IT, WHICH NEEDS REPLACING. MODEL 2013-14 ATS, CTS SEDAN. *PE
SB-10-04-20-001E2013-06-25. Service bulletin. CADILLAC: REAR AXLE IS MAKING A CHATTER NOISE DURING TURNING. MAY ALSO MAKE A CLUNKING SOUND DURING TURNING AS WELL. *KB
PI-03502011-06-08. Service bulletin. GM: THERE IS A GEAR WHINE FROM THE REAR WHEN DRIVING 30-60MPH. *RM UPDATED ON 6/15/2011. *KB UPDATED 8/1/11. *PE UPDATED 3/12/12. *PE
SB-102012010-09-29. Service bulletin. CADILLAC: UPDATE FOR INVENTORY AND CUSTOMER VEHICLES PROPSHAFT BOLTS INCOMPLETE HEAT TREATMENT-EXPIRES WITH BASE WARRANTY. PROVIDES SERVICE PROCEDURE TO REPLACE THE PROPSHAFT BOLTS ON CERTAIN MODEL YEAR VEHICLES. *PE
072712008-01-09. Service bulletin. LOOSE REAR DIFFERENTIAL BOLT - NOISE ON CERTAIN 2008 CADILLAC CTS. *NJ