Malfunction Indicator Lamp (MIL) Illuminated – DTC P0741 Set – 2014-2019 Chevrolet GMC

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Subject: Malfunction Indicator Lamp (MIL) Illuminated – DTC P0741 Set
Transmission:
Engine:
VIN:
Model
Brand: Model: Year:
from to fromot
MYB, MYC,
MYD
2019
Colorado 2016
Chevrolet
2014
Express
Silverado 2018
2019
Silverado LD 2019
2014
Suburban
Tahoe
2019
Canyon 2016
GMC
2014
Savana
Sierra 2018
2019
2019
Sierra Limited
Yukon 2014
North America
Involved Region
or Country
Some customers may comment that the MIL is Illuminated.
Condition Some technicians may find DTC P0741 (Torque Converter Clutch (TCC) System Stuck Off) set as an active or
history code.
Cause 1
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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.
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).
Cause 2
Perform a line pressure check.
Correction
⇒ If the line pressure is low, check the trans pump for damage and refer to the latest version of PI1447.
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.
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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.
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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
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Do Not replace the pump if no signs of damage or excessive wear was not validated during inspection as shown above.
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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.
Parts Information
Note: Only select the parts that coincide with the repair performed.
Causal Description Part Number Qty
Part
Refer to EPC 1
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
6-12.4 qts (5.7-11.7
liters)
88865601 (U.S.) 19420142 (Canada)
N/A Fluid, Transmission (DEXRON®VI)
Warranty Information
Note: Only select the labor operation number that coincide with the repair performed.
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
Labor Operation
8480848* Diagnostic Test All 0.5 hr
Add Transmission Line Pressure Test All 0.5 hr
Description Vehicle Labor Time
Labor Operation
3.8 hrs (2WD)
Silverado
Torque Converter Replacement
Add
5.1 hrs (4WD)
Add Sierra
Col- LCV
orado
Add
6.3 hrs (2WD)
Add Canyon 7.6 hrs (4WD)
Col- LFX
orado
Add
6.3 hrs (2WD)
Add Canyon 7.6 hrs (4WD)
Col- LWN
orado
Add
6.6 hrs (2WD)
11.9 hrs
Add Canyon (4WD)
4.2 hrs (2WD)
Suburban
Add
Add Tahoe 5.1 hrs (4WD)
Add Yukon
Add Express 4.2 hrs (2WD)
Add Savana 4.7 hrs (4WD)
Add Pump Inspection All 0.7 hr
Add TEHCMInspection and Cleaning All 1.0 hr
7
Version
Released July 11, 2019
Modified
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.
Revised November 22, 2021 – Added Tahoe to Warranty Information section.

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