Bulletin No.:

Service Bulletin

Date:

19-NA-153
December, 2020

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

VIN:
to

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 2020 General Motors LLC. All Rights Reserved.

Page 2
Cause 2

December, 2020

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

December, 2020

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.

Causal
Part

Description

N/A

ROTOR PKG, A/
TRNS
FLUID PUMP

Parts Information

N/A

Note: Only select the parts that coincide with the repair
performed.

VALVE,
CONT SOL

N/A

HOUSING, T/CV

N/A

FILTER KIT, A/
TRNS FLUID

N/A

Fluid,
Transmission
(DEXRON®VI)

Description

X

CONVERTER,
TORQ

N/A

Part
Number
Refer
to EPC

Qty

1

Qty

COVER, A/TRNS
FLUID PUMP

Perform an inspection of the transmission pump for
signs of excessive wear as shown above.
Replace pump components as necessary.

Causal
Part

Part
Number

88865601
(U.S.)
19420142
(Canada)

6-12.4 qts
(5.7-11.7
liters)

Page 4

December, 2020

Bulletin No.: 19-NA-153

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

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
Add

Torque Converter
Replacement

Add

Colorado
Canyon
Suburban

0.5 hr
3.8 hrs (2WD)
5.1 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

Version

5

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.

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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