# Service bulletin 15389

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: 10090012
- Published by NHTSA: 2017\-02\-01
- Manufacturer's number: 15389
- Manufacturer's date: 2015\-05\-21
- NHTSA component: POWER TRAIN:MANUAL TRANSMISSION

## NHTSA's summary

15389 \- SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPROGRAM THE TRANSMISSION CONTROL MODULE \(TCM\) ON CERTAIN 2015 MODEL YEAR CADILLAC ESCALADE, ESCALADE ESV, CHEVROLET SILVERADO, GMC SIERRA, YUKON DENALI AND YUKON DENALI XL VEHICLES EQUIPPED WITH AN 8L90 8\-SPEED \(M5U\) TRANSMISSION AND 6.2L \(L86\) ENGINE. THESE VEHICLES MAY HAVE A CONDITION IN WHICH TRANSMISSION CALIBRATION ALLOWS A HIGHER THAN TARGET ENERGY INPUT TO THE TORQUE CONVERTER CLUTCH \(TCC\) UNDER CERTAIN CONDITIONS. THIS MAY LEAD TO FASTER THAN EXPECTED TORQUE CONVERTER CLUTCH MATERIAL WEAR, AND A SHUDDER FEELING WHEN THE TCC IS APPLIED.

## 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, Manual transmission

## Vehicles listed

- 2015 CADILLAC ESCALADE
- 2015 CADILLAC ESCALADE ESV
- 2015 CHEVROLET SILVERADO 1500
- 2015 GMC SIERRA 1500
- 2015 GMC YUKON
- 2015 GMC YUKON DENALI
- 2015 GMC YUKON DENALI XL

## Other bulletins for the same vehicles and component

- [990420002L](/bulletins/10200154.md), 2021-08-09, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT. This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
- [030729004L](/bulletins/10160133.md), 2019-05-20, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION; EQUIPMENT. This informational bulletin provides normal operating characteristics and diagnostic information on Manual transmissions.
- [PIP5576](/bulletins/10145501.md), 2018-10-15, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN. This Preliminary information communicatesSES lamp, setting DTC P0333 when shifting the Transmissionfrom park.DTC P0333 cansetdue to voltage from the Transmission park/neutral signal 1circuit bleeding into the knock sensor system circuits.If SI does not isolate the concern inspect the K20 ECM connector X2 looking for debris, connectorand or terminal concerns.
- [14\-07\-30\-001E](/bulletins/10138143.md), 2018-05-21, Service bulletin: EQUIPMENT; POWER TRAIN:MANUAL TRANSMISSION. This informational bulletin provides technicians with information to assist in identifying operating characteristics of manual transmissions that repair attempts will not change.
- [03\-07\-29\-004J](/bulletins/10138130.md), 2018-05-21, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION. This informational bulletin provides technicians with information to assist in identifying operating characteristics of manual transmissions that repair attempts will not change.
- [17NA228](/bulletins/10137269.md), 2018-05-21, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION. This informational bulletin provides information on Click or Tick Noise on 3\-4 Shift that it should be considered a normal characteristic.
- [PIP5248B](/bulletins/10096046.md), 2017-03-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:MANUAL TRANSMISSION. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEPS NEED TO DIAGNOSE AND REPAIR VEHICLES THAT MAY HAVE STALLING SHUDDER AND/OR HARD SHIFTING INTO 1ST GEAR OR REVERSE VIBRATION ON LAUNCH \(WITH EXCESSIVE CRANKSHAFT END PLAY\). TECHNICIAN WILL TEST TO DETERMINE IF THE CRANK SHAFT END PLAY IS WITHIN SPECIFICATION 0.0015–0.0086\&\#8201;INCH. IF END PLAY IS FOUND TO BE OUT OF SPECIFICATION, REMOVE ENGINE AND INSPECT FOR POSSIBLE CRANKSHAFT THRUST BEARING AND/OR CRANKSHAFT FOR WEAR. INSPECT THRUST BEARING FOR WEAR ON ONE SIDE AND CRANKSHAFT ON THAT “MATING” SURFACE. IF THE THRUST BEARING HAS THREE VERTICAL CHANNELS WORN OFF REPLACE CONNECTING ROD BEARINGS, MAIN BEARINGS, THRUST BEARING AND CRANKSHAFT. IF WORKING ON A CORVETTE THE OIL TANK WITH LINES AND OIL COOLER ARE BOTH REQUIRED TO BE REPLACED IF EQUIPPED.
- [PIE0350C](/bulletins/10094784.md), 2017-03-13, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION. THIS ENGINEERING INFORMATIONAL BULLETIN IS ENDING THE NEED FOR INFORMATION FROM THE FIELD OF VEHICLES WITH THE CONDITION OF BANG OR LOUD NOISE WITH NO FORWARD \(DRIVE\) OR REVERSE RANGES.
- [15178](/bulletins/10090112.md), 2017-02-01, Service bulletin: POWER TRAIN:MANUAL TRANSMISSION. 15178 \- SERVICE UPDATE \(DRIVE AUDIT MESSAGE ONLY\). GENERAL MOTORS HAS DECIDED THAT CERTAIN VEHICLES EQUIPPED WITH 8\-SPEED TRANSMISSION \(RPO M5U\) MAY HAVE TRANSMISSION GEAR WHINE NOISE. TO ADDRESS THIS CONDITION WE WILL BE RELEASING SERVICE UPDATE BULLETIN 15178 AS SOON AS A SUFFICIENT QUANTITY OF REPLACEMENT PARTS IS AVAILABLE. IT IS ESTIMATED THAT ONLY 5% OF THE INVOLVED VEHICLES WILL REQUIRE REPAIR.
- [15216](/bulletins/10090006.md), 2017-01-31, Service bulletin: EQUIPMENT; POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:MANUAL TRANSMISSION. 15216 \- CUSTOMER SATISFACTION PROGRAM. CERTAIN 2015 MODEL YEAR CADILLAC ESCALADE AND ESCALADE ESV; CHEVROLET SILVERADO LD CREW AND DOUBLE CAB; AND GMC SIERRA LD CREW, SIERRA LD CREW DOUBLE CAB, YUKON, AND YUKON XL MODEL VEHICLES THAT ARE EQUIPPED WITH A 6.2L ENGINE \(RPO L86\) AND 8\-SPEED AUTOMATIC TRANSMISSION \(RPO M5U\) MAY HAVE A CONDITION IN WHICH THE U\-JOINT RETAINER BOLTS LOSE INDEX. IF THIS CONDITION OCCURS, THE CUSTOMER MAY HEAR OR FEEL A “CLUNKING” NOISE WHEN CHANGING SPEED. IF THIS CONDITION IS NOT CORRECTED, REDUCED CLAMP LOAD MAY CAUSE THE PROPSHAFT TO MOVE RELATIVE TO THE AXLE YOKE AND THE CUSTOMER MAY FEEL A VIBRATION. IF ONE OR MORE BOLTS BACK OUT COMPLETELY, THE PROPSHAFT MAY SEPARATE FROM THE AXLE RESULTING IN A LOSS OF DRIVE AND POTENTIAL DAMAGE TO THE UNDERSIDE OF THE VEHICLE. DEALERS ARE TO REPLACE TWO U\-JOINT RETAINERS AND FOUR U\-JOINT RETAINER BOLTS WITH NEW BOLTS THAT INCLUDE AN ADHESIVE PATCH.

JSON: [/v1/bulletins/10090012](/v1/bulletins/10090012)

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