19NA153
Service Bulletin Details
Public Details for: 19NA153
This technical bulletin provides a procedure to replace the torque converter and inspect the front pump and the tehcm for metal.
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Service Bulletin Bulletin No.: 19-NA-153 Date: May, 2021 TECHNICAL Subject: Brand: Malfunction Indicator Lamp (MIL) Illuminated - DTC P0741 Set Model: Colorado Express Chevrolet Silverado Silverado LD Suburban Tahoe Canyon Savana GMC Sierra Model Year: from 2016 2014 to VIN: from to Engine: Transmission: 2019 2018 2019 2014 2016 2014 Sierra Limited 2019 Yukon 2014 2019 MYB, MYC, MYD 2019 2018 2019 Involved Region or Country North America Condition Some customers may comment that the MIL is Illuminated. Some technicians may find DTC P0741 (Torque Converter Clutch (TCC) System Stuck Off) set as an active or history code. Cause 1 5448383 This condition may be caused by a damaged turbine shaft front bushing (218) in vehicles with mileage less than 10,000 miles (approx. 16,000 km). ⇒ The turbine shaft may also be damaged in the journal area that is in contact with this bushing. Copyright 2021 General Motors LLC. All Rights Reserved. Page 2 Cause 2 May, 2021 Bulletin No.: 19-NA-153 This condition may be caused by a damaged clutch friction material in the torque converter in vehicles with mileage above 30,000 miles (approx. 48,000 km). Perform a line pressure check. ⇒ If the line pressure is low, check the trans pump for damage and refer to the latest version of PI1447. Correction 1. Connect GDS to the vehicle for a road test. 2. Select TCM and navigate to the TCC dynamic test screen. 3. Drive the vehicle at approximately 10 mph (16 km/h) and command the TCC on and off several times. Note if the TCC engages; ⇒ Should feel TCC engagement and see tachometer drop. ⇒ TCC slip speed will drop to near zero. • If TCC does not engage, refer to SI for P0741 to test for circuit/electrical problem and/ or sticking TCC apply valve. • If the TCC does engage, refer to the Service Procedure below. Service Procedure 1. Replace the torque converter. Refer to Torque Converter Replacement in SI. 5360222 5360216 2. Remove the transmission oil pan. 3. Inspect the magnet in the pan for excessive metal accumulation. • If there was no signs of metal in the oil pan, install the pan and no further work is required. • If there was excessive metal shaving in the oil pan magnet, Install new filter when reassembling and continue to step 4. 4. Remove the upper and lower valve body and clean thoroughly. 5. Inspect the TEHCM solenoid screen for debris: • If there was no signs of metal in the TEHCM, install the pan and no further work is required. • If there was excessive debris in the TEHCM, replace the TEHCM/solenoid valve body Only if there is debris on the screen as shown above and continue Bulletin No.: 19-NA-153 May, 2021 Page 3 5360776 Do Not replace the pump if no signs of damage or excessive wear was not validated during inspection as shown above. 5360218 Note: Refer to the latest version of PI1447 for possible bushing/shaft scoring. Replace parts as necessary. Perform an inspection of the transmission pump for signs of excessive wear as shown above. Replace pump components as necessary. Page 4 May, 2021 Bulletin No.: 19-NA-153 Parts Information Warranty Information Note: Only select the parts that coincide with the repair performed. Note: Only select the labor operation number that coincide with the repair performed. Causal Part Description X CONVERTER, TORQ N/A COVER, A/TRNS FLUID PUMP N/A ROTOR PKG, A/TRNS FLUID PUMP N/A VALVE, CONT SOL N/A HOUSING, T/CV N/A FILTER KIT, A/TRNS FLUID N/A Fluid, Transmission (DEXRON®VI) Labor Operation Part Number Qty Refer to EPC 1 88865601 (U.S.) 19420142 (Canada) 6-12.4 qts (5.7-11.7 liters) For vehicles repaired under the Powertrain coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Description Vehicle Labor Time 8480848* Diagnostic Test All 0.5 hr Add Transmission Line Pressure Test All Add Silverado Add Sierra Add Colorado Add Canyon Add Colorado Add Add Torque Converter Replacement Canyon Colorado Add Canyon Add Suburban 0.5 hr 3.8 hrs (2WD) 5.1 hrs (4WD) LCV 6.3 hrs (2WD) 7.6 hrs (4WD) LFX 6.3 hrs (2WD) 7.6 hrs (4WD) LWN 6.6 hrs (2WD) 11.9 hrs (4WD) 4.2 hrs (2WD) 5.1 hrs (4WD) Add Yukon Add Express Add Savana 4.2 hrs (2WD) 4.7 hrs (4WD) 0.7 hr Add Pump Inspection All Add TEHCM Inspection and Cleaning All 1.0 hr Bulletin No.: 19-NA-153 May, 2021 Page 5 Version 6 Modified Released July 11, 2019 Revised August 07, 2019 - Add Utility models to the Model section. Revised November 26, 2019 - Added Cause 1 section. Revised May 04, 2020 - Removed LTG time to combine all time under Bulletin Only labor time and removed the T1 truck information. Revised December 03, 2020 - Increased Mileage in the Cause 1 section, Add Replace Fluid Filter in Step 3 and Add Fluid Filter to Parts Information section. Revised May 03, 2021 - Add LCV information to Warranty Information section. GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION