Bulletin No.:

Service Bulletin

Date:

19-NA-153
August, 2019

TECHNICAL
Subject:
Brand:

Malfunction Indicator Lamp (MIL) Illuminated - DTC P0741 Set
Model:
Colorado
Express
Silverado

Model Year:
from
2016
2014

VIN:
to

from

to

Engine:

Transmission:

2019
2018

Silverado LD
Chevrolet

Silverado
1500 (New
Model)
Suburban
Tahoe
Canyon
Savana
Sierra

GMC

Sierra
Limited
Sierra 1500
(New Model)
Yukon

2019
2019
2014
2016
2014

2019

MYB,
MYC, MYD
2019
2018

2019

2014

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

This condition may be caused by a damaged clutch friction material in the torque
converter in vehicles with mileage above 30,000.
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 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.

Copyright 2019 General Motors LLC. All Rights Reserved.

Page 2

August, 2019

Service Procedure

Bulletin No.: 19-NA-153

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

1. Replace the torque converter. Refer to Torque
Converter Replacement in SI.

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, continue to step 4.

5360222

Bulletin No.: 19-NA-153

August, 2019

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

August, 2019

Bulletin No.: 19-NA-153

Parts Information
Note: Only select the parts 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

Fluid,
Transmission
(DEXRON®VI)

Part
Number

Qty

Refer
to EPC

1

88865601
(U.S.)
19367328
(Canada)

6-12.4 qts
(5.7-11.7
liters)

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.
Labor Operation

Description

Labor Time

Torque Converter Replacement

Use the Published Labor
Operations Time

8480848*

Diagnostic Test

0.5 hr

8464810

Add

Transmission Line Pressure Test

0.5 hr

Add

Pump Inspection

0.7 hr

Add

TEHCM Inspection and Cleaning

1.0 hr

*This is a unique Labor Operation for Bulletin use only.

Version

2

Modified

Released July 11, 2019
Revised August 07, 2019 - Add Utility models to the Model 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.

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