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Service bulletins for the 2015 Chevrolet Silverado

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.

3099 on file from NHTSA, as of 2026-10-19.

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Only bulletins with component: Automatic transmission are shown. Show all

Bulletins, newest first
PIT5202B2017-08-15. Service bulletin. SERVICE BRAKES; POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN. This Preliminary Information communication provides information to the technician about vehicles that are equipped with 6L80 Regular Production Option Code (MYC), 6L90 Regular Production Option Code (MYD) or 8L90 Regular Production Option Code (M5U) Automatic Transmission. Starting with the 2013 model year, Full Size Trucks and Utilities now have Powertrain Grade Braking. Powertrain grade braking assists when driving on a downhill grade to help maintain desired vehicle speed by using the engine and transmission to slow the vehicle.
PIT5206C2017-08-15. Service bulletin. SERVICE BRAKES; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. This Preliminary Information communication provides information to the technician with the steps on diagnosing and repairing vehicles that may have unwanted grade braking, reduced engine power with no Driver Information Center messages ? Brake Pedal Override Feature ?, transmission busy or frequent shifting up or down, and Diagnostic Trouble Codes P057B, P057C, and/or P057D may or may not be set. Technician will use this preliminary information to find the brake pedal position data parameters in the scan tool, and also to provide some additional diagnostic help. These issues may be caused by an incorrect brake pedal position sensor input to the engine control module. Technician will verify with the scan tool if the engine control module has the correct parameters for the brake pedal position sensor. If an engine control module brake pedal position sensor relearn is performed, the truck may be temporarily repaired until the intermittent wiring issue between the engine control module and brake pedal position sensor occurs again. On 2014 and newer trucks inspect and repair any damage to X115 and X119. On the 2014 and previous trucks inspect and repair any damage to X205.
PIP52132017-08-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary Information communication advises the technician that the T87 TCM for the 8L90 8 speed and the LCT1000 6 Speed Allison (MW7) automatic transmission is on restriction through General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.
PIT5206B2017-08-15. Service bulletin. SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES; SERVICE BRAKES; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). This Preliminary Information communication provides information to the technician with the steps on diagnosing and repairing vehicles that may have unwanted grade braking, reduced engine power with no Driver Information Center messages "Brake Pedal Override Feature", transmission busy or frequent shifting up or down. Technician will use this preliminary information to find the brake pedal position data parameters in the scan tool, and also to provide some additional diagnostic help. These issues may be caused by an incorrect brake pedal position sensor input to the engine control module. Technician will verify with the scan tool if the engine control module has the correct parameters for the brake pedal position sensor.
PIP5021C2017-08-15. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. This Preliminary Information communication advises the technician that the Allison 6 Speed Automatic Transmission Assembly (RPO MW7) have been placed on restriction through General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.
PIP5337H2017-08-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. This Preliminary Information communication provides information to the technician on the step to diagnose and repair the vehicles that may have a shake or shudder during light throttle acceleration, between 30 and 65 miles per hour steady state driving. Also shudder feeling that may be described as driving over rumble strips or rough pavement. Technician will need to run the vehicle in three different operational modes. The three modes are Normal, torque converter clutch open, and torque converter clutch closed. Technician will need to press and hold the tow-haul mode button for five seconds to disable grade braking to prevent downshifts during test. Technician will need to duplicate the concern in Normal mode. If the concern is gone in torque converter clutch open and closed then the torque converter should be replaced. If the concern is not present in normal mode, torque converter clutch open, and torque converter clutch closed the concern is not with the shudder. Technician should use of the PICO scope and Noise, Vibration and Harshness software can be used to confirm torque converter clutch shudder, Engine, Tire or Driveline component related conditions. Flush the cooler lines and cooler using DT-45096 transmission oil cooling system flush and flow test tool when the torque converter is replace.
PIT5206E2017-05-22. Service bulletin. SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES; PARKING BRAKE; ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN WITH THE STEPS ON DIAGNOSING AND REPAIRING VEHICLES THAT MAY HAVE UNWANTED GRADE BRAKING, REDUCED ENGINE POWER WITH NO DRIVER INFORMATION CENTER MESSAGES “ BRAKE PEDAL OVERRIDE FEATURE “, TRANSMISSION BUSY OR FREQUENT SHIFTING UP OR DOWN, AND DIAGNOSTIC TROUBLE CODES P057B, P057C, AND/OR P057D MAY OR MAY NOT BE SET. TECHNICIAN WILL USE THIS PRELIMINARY INFORMATION TO FIND THE BRAKE PEDAL POSITION DATA PARAMETERS IN THE SCAN TOOL, AND ALSO TO PROVIDE SOME ADDITIONAL DIAGNOSTIC HELP. THESE ISSUES MAY BE CAUSED BY AN INCORRECT BRAKE PEDAL POSITION SENSOR INPUT TO THE ENGINE CONTROL MODULE. TECHNICIAN WILL VERIFY WITH THE SCAN TOOL IF THE ENGINE CONTROL MODULE HAS THE CORRECT PARAMETERS FOR THE BRAKE PEDAL POSITION SENSOR. IF AN ENGINE CONTROL MODULE BRAKE PEDAL POSITION SENSOR RELEARN IS PERFORMED, THE TRUCK MAY BE TEMPORARILY REPAIRED UNTIL THE INTERMITTENT WIRING ISSUE BETWEEN THE ENGINE CONTROL MODULE AND BRAKE PEDAL POSITION SENSOR OCCURS AGAIN. ON 2014 AND NEWER TRUCKS INSPECT AND REPAIR ANY DAMAGE TO X115 AND X119. ON THE 2014 AND PREVIOUS TRUCKS INSPECT AND REPAIR ANY DAMAGE TO X205.
16-NA-0142017-04-11. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO REPLACE THE STATOR SHAFT SUPPORT TO CORRECT CUSTOMER CONCERN ON A DELAYED ENGAGEMENT WHEN THE TRANSMISSION IS SHIFTED FROM PARK TO REVERSE OR PARK TO DRIVE AFTER THE VEHICLE HAS BEEN SITTING WITH THE ENGINE OFF DUE TO THE TORQUE CONVERTER DRAINING THE TRANSMISSION FLUID BACK INTO THE TRANSMISSION PAN.
PIP53782017-03-22. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON HOW TO DIAGNOSE AND REPAIR VEHICLES THAT MAY HAVE A FLASHING PRNDL OR CHECK ENGINE LIGHT ON. ALSO THE TRANSMISSION IS STUCK IN ONE GEAR AND WILL NOT UPSHIFT. IF SERVICE INFORMATION DIAGNOSTICS FOR THE DIAGNOSTIC TROUBLE CODES SETTING DOES NOT LEAD TO A RESOLUTION, THE PRESSURE SWITCH MANIFOLD SHOULD BE REPLACED.
PIP5337B2017-03-21. Service bulletin. ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN ON THE STEP TO DIAGNOSE AND REPAIR THE VEHICLES THAT MAY HAVE A SHAKE OR SHUDDER DURING LIGHT THROTTLE ACCELERATION, BETWEEN 30 AND 65 MPH STEADY STATE DRIVING. ALSO SHUDDER FEELING THAT MAY BE DESCRIBED AS DRIVING OVER RUMBLE STRIPS OR ROUGH PAVEMENT. TECHNICIAN WILL DRIVE THE VEHICLE AND MONITOR THE TORQUE CONVERTER CLUTCH SLIP. THE TORQUE CONVERTER CLUTCH SLIP SPEED SHOULD BE 10 RPM OR LESS ALSO NOTE IF THE SHUDDER TAKES PLACE DURING TORQUE CONVERTER CLUTCH APPLY. IF THE TORQUE CONVERTER CLUTCH SLIP SPEED IS IN THE RANGE OF 10 RPM OR LESS THE CONDITION IS POSSIBLY RELATED TO ENGINE PERFORMANCE. IF THE SHUDDER IS ONLY PRESENT IN 4 CYLINDER MODE AND TORQUE CONVERTER CLUTCH SLIP IS 10 RPM OR LESS DEEM THE SHUDDER CONCERN NORMAL CHARACTERISTIC OF ACTIVE FUEL MANAGEMENT. IF THE SLIP SPEED IS BEYOND 10 RPM OR THERE IS SHUDDER DURING TORQUE CONVERTER CLUTCH APPLY THE TORQUE CONVERTER WILL NEED TO BE REPLACED.
PIP5248B2017-03-21. 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 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.
PIP5224C2017-03-21. Service bulletin. EQUIPMENT ADAPTIVE/MOBILITY; POWER TRAIN:AUTOMATIC TRANSMISSION. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THE ALLISON LCT1000 VALVE BODY PART NUMBER 24262535 HAS BEEN PLACED ON RESTRICTION THROUGH GENERAL MOTORS PRODUCT QUALITY CENTER. DEALER WILL NEED TO CALL GENERAL MOTORS PRODUCT QUALITY CENTER FOR FURTHER ASSISTANCE.
PIP5213A2017-03-15. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THE LCT1000 6 SPEED ALLISON AUTOMATIC TRANSMISSION IS ON RESTRICTION THROUGH GENERAL MOTORS PRODUCT QUALITY CENTER. DEALER WILL NEED TO CALL GENERAL MOTORS PRODUCT QUALITY CENTER FOR FURTHER ASSISTANCE.
PIP4568R2017-03-14. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE; EQUIPMENT ADAPTIVE/MOBILITY. THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN THAT SOME VEHICLES MAY HAVE A SERVICE ENGINE SOON LAMP, ENGINE MISFIRE ON CYLINDER 1, 4, 6, OR 7 AND/OR TICK NOISE. TECHNICIAN WILL FOLLOW SERVICE INFORMATION DIAGNOSIS FIRST. IF SERVICE INFORMATION DIAGNOSIS DOES NOT ISOLATE THE CAUSE OF THIS CONCERN PERFORM A CYLINDER DEACTIVATION ACTIVE FUEL MANAGEMENT SYSTEM COMPRESSION TEST IN SERVICE INFORMATION. IF THE RUNNING COMPRESSION OF THE MISFIRING CYLINDER STAYS BELOW 25 POUNDS PER SQUARE INCH REGARDLESS OF THE ACTIVE FUEL MANAGEMENT SOLENOID BEING COMMANDED ON OR OFF, AN ACTIVE FUEL MANAGEMENT LIFTER IS MECHANICALLY COLLAPSED/STUCK OR UNLOCKING AS SOON AS THE ENGINE IS STARTED. REPLACE ALL ACTIVE FUEL MANAGEMENT LIFTERS, AND ALL PLASTIC LIFTER GUIDES. ALSO PERFORM THE CYLINDER DEACTIVATION ACTIVE FUEL MANAGEMENT VALVE LIFTER OIL MANIFOLD DIAGNOSIS AND TESTING IN SERVICE INFORMATION. IF IT ISOLATES A CONCERN WITH THE VALVE LIFTER OIL MANIFOLD, REPLACE IT AND REEVALUATE THE CONCERN. THE ACTIVE FUEL MANAGEMENT LIFTERS CAN ALSO BE MONITORED FOR PROPER OPERATION BY CAREFULLY INSPECTING THE CYLINDER 1, 4, 6, AND 7 ROCKERS AND VALVES WHILE CRANKING OR BRIEFLY AND SAFELY RUNNING THE ENGINE WITH THE VALVE COVERS REMOVED. IF THE VALVE OR VALVES OF AN ACTIVE FUEL MANAGEMENT CYLINDER STOP MOVING WHILE DOING THIS TEST, THE ACTIVE FUEL MANAGEMENT LIFTER IS CAUSING THE CONCERN. FOR 2008-2009 FULL SIZE TRUCK/SUV OR A 2007-2009 CHEVROLET TAHOE WITH THE POLICE PACKAGE REPROGRAM THE ENGINE CONTROL MODULE. ON THE 2008-2009 PONTIAC G8, 2010-2011 CAMARO, AND 2007-2010 FULL SIZE TRUCKS WITH ACTIVE FUEL MANAGEMENT, ALSO DETERMINE IF THE ACTIVE FUEL MANAGEMENT PRESSURE RELIEF VALVE SHIELD THAT IS LISTED IN THE LATEST VERSION OF 10-06-01-008 HAS EVER BEEN INSTALLED. ON PASSENGER CARS WITH THE LS4 ENGINE, DETERMINE IF THE UPDATED OIL PAN GASKET THAT IS LISTED IN THE LATEST VERSION OF 11-06-01-007 HAS BEEN INSTALLED.
144102017-02-03. Service bulletin. LATCHES/LOCKS/LINKAGES:DOORS:LATCH; POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. 14410 - SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REMOVE AND REINSTALL THE DOOR LATCH FASTENERS ON THE DRIVER'S SIDE FRONT AND REAR DOOR ON CERTAIN VEHICLES. THESE FASTENERS MAY HAVE BEEN INSTALLED BELOW PROPER TORQUE SPECIFICATIONS, AND OVER TIME, COULD ALLOW A REDUCTION IN CLAMP LOAD, RESULTING IN A POTENTIAL DOOR RATTLE.
148762017-02-02. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 14876 - SERVICE UPDATE. ON CERTAIN VEHICLES EQUIPPED WITH 8-SPEED AUTOMATIC TRANSMISSION (M5U), THE CUSTOMER MAY COMPLAIN ABOUT HARSH SHIFTING. THIS CAN OCCUR IF THE VEHICLE EXPERIENCED MULTIPLE TRANSMISSION REPROGRAMMING EVENTS DURING MANUFACTURING, CAUSING THE CALIBRATION TO OVER-ADJUST THE SHIFT PARAMETERS. THIS BULLETIN PROVIDES A SERVICE ADAPTIVE LEARN PROCEDURE THAT SHOULD BE RUN TO RESET THE CALIBRATION TO THE BASELINE PARAMETERS.
151782017-02-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION (PRNDL); ENGINE. "15178 - SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO PERFORM A DRIVE AUDIT AND, IF NECESSARY, REPLACE THE REACTION/OUTPUT CARRIER ASSEMBLY AND ASSOCIATED PARTS ON CERTAIN 2015 MODEL YEAR CADILLAC ESCALADE, ESCALADE ESV; CHEVROLET SILVERADO LD CREW, SILVERADO LD CREW LTZ, SILVERADO LD EXT LTZ; AND GMC SIERRA LD CREW, SIERRA LD CREW DENALI, SIERRA LD EXT, YUKON, YUKON DENALI, YUKON XL, YUKON XL DENALI VEHICLES EQUIPPED WITH AN 8-SPEED TRANSMISSION (M5U) AND A 6.2L ENGINE (L86). SOME OF THESE VEHICLES MAY EXHIBIT A TRANSMISSION GEAR WHINE NOISE AT 1000-2000 RPM AND BETWEEN 20 MPH (32 KPH) AND 35 MPH (56 KPH)."
152162017-01-31. 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.
15178A2017-01-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:MANUAL TRANSMISSION. 15178A - SERVICE UPDATE (REVISED PARTS INFORMATION, SERVICE PROCEDURE AND WARRANTY TRANSACTION INFORMATION). THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO PERFORM A DRIVE AUDIT AND, IF NECESSARY, REPLACE THE REACTION/OUTPUT CARRIER ASSEMBLY AND ASSOCIATED PARTS ON CERTAIN 2015 MODEL YEAR CADILLAC ESCALADE, ESCALADE ESV; CHEVROLET SILVERADO LD CREW, SILVERADO LD CREW LTZ, SILVERADO LD EXT LTZ; AND GMC SIERRA LD CREW, SIERRA LD CREW DENALI, SIERRA LD EXT, YUKON, YUKON DENALI, YUKON XL, YUKON XL DENALI VEHICLES EQUIPPED WITH AN 8-SPEED TRANSMISSION (M5U) AND A 6.2L ENGINE (L86). SOME OF THESE VEHICLES MAY EXHIBIT A TRANSMISSION GEAR WHINE NOISE AT 1000-2000 RPM AND BETWEEN 20 MPH (32 KPH) AND 35 MPH (56 KPH).
15435A2017-01-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. 15435A - SERVICE UPDATE (REVISED SERVICE PROCEDURE). THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPLACE THE TORQUE CONVERTER ON CERTAIN 2015 MODEL YEAR CHEVROLET SILVERADO HD, GMC SIERRA HD AND GMC SIERRA DENALI HD VEHICLES EQUIPPED WITH AN ALLISON 6-SPEED AUTOMATIC TRANSMISSION (RPO MW7). THESE VEHICLES MAY HAVE BEEN ASSEMBLED WITH AN INCORRECTLY MACHINED TORQUE CONVERTER. CUSTOMERS MAY EXPERIENCE NOISE, POOR PERFORMANCE AND, IF THIS CONDITION IS NOT CORRECTED, EVENTUAL TRANSMISSION FAILURE.
154352017-01-31. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. 15435 - SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPLACE THE TORQUE CONVERTER ON CERTAIN 2015 MODEL YEAR CHEVROLET SILVERADO HD, GMC SIERRA HD AND GMC SIERRA DENALI HD VEHICLES EQUIPPED WITH AN ALLISON 6-SPEED AUTOMATIC TRANSMISSION (RPO MW7). THESE VEHICLES MAY HAVE BEEN ASSEMBLED WITH AN INCORRECTLY MACHINED TORQUE CONVERTER. CUSTOMERS MAY EXPERIENCE NOISE, POOR PERFORMANCE AND, IF THIS CONDITION IS NOT CORRECTED, EVENTUAL TRANSMISSION FAILURE.
15435B2017-01-30. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:MANUAL TRANSMISSION. "15435B - SERVICE UPDATE (REVISED PART INFORMATION). THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPLACE THE TORQUE CONVERTER ON CERTAIN 2015 MODEL YEAR CHEVROLET SILVERADO HD, GMC SIERRA HD AND GMC SIERRA DENALI HD VEHICLES EQUIPPED WITH AN ALLISON 6-SPEED AUTOMATIC TRANSMISSION (RPO MW7). THESE VEHICLES MAY HAVE BEEN ASSEMBLED WITH AN INCORRECTLY MACHINED TORQUE CONVERTER. CUSTOMERS MAY EXPERIENCE NOISE, POOR PERFORMANCE AND, IF THIS CONDITION IS NOT CORRECTED, EVENTUAL TRANSMISSION FAILURE. "
153962017-01-30. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. "15396 - SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO INSTALL THE ORIGINAL DESIGN TEMPERATURE-SENSOR WIRING HARNESS TO THE VALVE BODY ON CERTAIN 2015 MODEL YEAR CADILLAC ESCALADE AND ESCALADE ESV; CHEVROLET SILVERADO; AND GMC SIERRA, YUKON, AND YUKON XL VEHICLES. THE SUPPLIER OF THE TRANSMISSION-WIRING HARNESS INTRODUCED AN UNAPPROVED CHANGE TO THE TEMPERATURE SENSOR (THERMISTOR), RESULTING IN INCORRECT OIL-TEMPERATURE READINGS DURING TRANSITION FROM COLD TO WARM TEMPERATURES. THIS COULD CAUSE A HARSH SHIFT WHEN STARTING THE VEHICLE AT TEMPERATURES BELOW 32ºF (0ºC); HOWEVER, SHIFT QUALITY IMPROVES ONCE THE TRANSMISSION OIL WARMS UP."
156672017-01-30. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. 15667 - SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO CHECK AND ADJUST TRANSMISSION FLUID LEVELS ON THE VEHICLES LISTED ABOVE. THESE VEHICLES MAY EXPEL EXTRA TRANSMISSION FLUID OUT OF A VENT FITTING AND HOSE ON THE TOP OF THE TRANSMISSION.
16-NA-2132017-01-18. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. THIS INFORMATIONAL BULLETIN PROVIDES INFORMATION ON TRANSMISSIONS WITH HARSH SHIFTS AFTER MILEAGE ACCUMULATION WITHOUT PREVIOUS REPAIRS AND/OR CALIBRATION UPDATES.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.