NHTSA ID Number: 10165435
Manufacturer Communication Number: N192217820
TSB/Document Date: 2019-09-30
Summary
N192217820 - Service Update Bulletin. The current transmission fluid may cause the customer to experience a shake or shudder feeling, which may be described as driving over rumble strips or rough pavement. Dealers are to drain the old transmission fluid and refill with the new fluid.
packages will result in a low concentration level of new fluid and will not provide satisfactory results.
1.
Fill the DT-45096 with 20 quarts of HP fluid.
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Note: The MAF sensor must stay connected so that no DTCs will set.
2.
Separate the engine upper air filter box (1) from the lower air filter housing to gain access to the upper transmission
oil cooler line.
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N192217820 Torque Converter Shudder/Shake
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Note: Upper air filter box removed for clarity.
3.
Remove the cooler line from the transmission oil cooler.
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4.
Install end of the DT-52263-5 Radiator Cooler Drain Adapter (1) to the DT-52263-1 Block Assembly.
5.
Install the DT-52263-5 Radiator Cooler Drain Adapter into the upper transmission oil cooler line port of the
transmission oil cooler.
6.
Install the DT-45096-31 adapter (3) over the removed transmission oil cooler line (2) to prevent any fluid spillage.
7.
Place the hose in the GE-47716-2 Graduated Measuring Bucket, utilizing a Spring Clamp to retain the hose.
8.
Raise the vehicle.
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9. Install the DT-45096-31 adapter (1) to the DT-51190 fluid fill adapter (2).
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10. Remove the level set plug (1) from the transmission oil pan.
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Important: DO NOT overtighten the DT-51190 as it can be damaged by excessive torque. Do not exceed 9 Nm (80 lb
in).
11. Install the DT-51190/DT-45096-31 assembly and hand tighten.
12. Connect the TransFlow fluid feed (supply) line (3) to the DT-45096-31 adapter (2).
13. Lower the vehicle.
Caution: DO NOT REMOVE MORE THAN 3 QTS OF FLUID AS IT COULD CAUSE FLUID PUMP CAVITATION AND
POSSIBLY DAMAGE THE TRANSMISSION.
14. Utilizing the graduated bucket, start the engine and run 30-45 seconds until 3 quarts of fluid is expelled.
15. Shut the engine off immediately.
16. Connect the DT-45096 to the vehicle battery 12 volts and connect shop air to the air connection.
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Important: ADDING TOO MUCH FLUID TO THE TRANSMISSION MAY CAUSE FLUID TO BE EXPELLED FROM THE
VENT SYSTEM. DO NOT OVERFILL THE TRANSMISSION.
17. Switch the DT-45096 TransFlow to Flow and add 4 quarts of HP to the transmission.
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18. Set the TransFlow switch to idle (Reducing fluid level in the TransFlow from 20–16).
19. Switch the TransFlow DT-45096 to Flow and start the engine:
19.1. Add a maximum of 4 quarts of HP Fluid to the transmission, turn the TransFlow switch to idle once 4 quarts have
been added, while allowing 4 additional quarts of oil to fill the DT-graduated cylinder (Reducing fluid level in the
TransFlow from 16–12).
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Note: DO NOT add additional transmission fluid until the 4 quarts of oil have been removed from the transmission
(Reducing fluid level in the TransFlow from 12–8).
19.2. Repeat step 19.1.
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19.3. Add a maximum of 5 quarts of HP Fluid to the transmission while allowing 5 additional quarts of oil to fill the DTgraduated bucket (Reducing fluid level in the TransFlow from 8–3).
19.4. Shut the engine off once 16 quarts of oil have been collected.
19.5. Properly dispose of the collected transmission fluid.
20. Remove the DT-52263-5 Radiator Cooler Drain Adapter and DT-52263-1 Block Adapter from the transmission oil
cooler.
21. Remove the DT-45096-31 from the transmission oil cooler line and install the transmission oil cooler line using a
new retaining clip.
22. Install the engine upper air filter box back into position.
23. Partially raise the vehicle.
24. Start the engine.
25. Using care, shift the transmission through all forward ranges and Reverse.
26. Shift the transmission into Park.
27. Perform the Transmission Fluid Level and Condition Check outlined below in this procedure:
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27.1. Get the transmission fluid temperature to the proper temperature.
27.2. Raise the vehicle and remove the DT-51190/DT-45096-31 assembly.
27.3. Install the level set plug and tighten to 9 Nm (80 lb in).
The TCC shudder condition should be directional improved immediately after the fluid exchange procedure. It may take
up to 320 km (200 mi) for the TCC shudder condition to be eliminated. It is not a requirement for the dealer to drive the
vehicle 320 km (200 mi). The customer should be advised that the full effect will take up to 320 km (200 mi) and a minimum
of two cold to operating temperature drive cycles.
Fluid Exchange Procedure - CTS and ATS Equipped with a Rear Differential Cooler
Important: This procedure must be followed as published. The exchange process is required to obtain proper level of
new blue label Mobil 1 Synthetic LV ATF HP fluid. Intermixing of other types of transmission fluid or aftermarket additive
packages will result in a low concentration level of new fluid and will not provide satisfactory results.
1.
Fill the DT-45096 with 20 quarts of HP fluid.
2.
Raise the vehicle.
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3.
Remove the lower/front transmission oil cooler line (2) at the rear differential.
4.
Install the DT-52263-2 Cooler Line Plug (1) into the rear differential to prevent fluid loss.
5.
Install one end of the DT-52263-4 hose (4) to the open port of the DT-52263-1 Block Assembly (3).
6.
Install the other end of the DT-52263-4 hose to the transmission oil cooler line.
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7.
Place the hose in the GE-47716-2 Graduated Measuring Bucket, utilizing a Spring Clamp to retain the hose.
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8. Install the DT-45096-31 adapter (1) to the DT-51190 fluid fill adapter (2).
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9.
Remove the level set plug (1) from the transmission oil pan.
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Important: DO NOT overtighten the DT-51190 as it can be damaged by excessive torque. Do not exceed 9 Nm (80 lb
in).
10. Install the DT-51190/DT-45096-31 assembly and hand tighten.
11. Connect the TransFlow fluid feed (supply) line (3) to the DT-45096-31 adapter (2).
12. Lower the vehicle.
Caution: DO NOT REMOVE MORE THAN 3 QTS OF FLUID AS IT COULD CAUSE FLUID PUMP CAVITATION AND
POSSIBLY DAMAGE THE TRANSMISSION.
13. Utilizing the graduated bucket, start the engine and run 30-45 seconds until 3 quarts of fluid is expelled.
14. Shut the engine off immediately.
15. Connect the DT-45096 to the vehicle battery 12 volts and connect shop air to the air connection.
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16. Switch the TransFlow DT-45096 to Flow and add 4 quarts of HP to the transmission.
17. Set the TransFlow switch to idle (Reducing fluid level in the TransFlow from 20–16).
18. Switch the TransFlow DT-45096 to Flow and start the engine:
18.1. Add a maximum of 4 quarts of HP Fluid to the transmission, turn the TransFlow switch to idle once 4 quarts have
been added, while allowing 4 additional quarts of oil to fill the DT-graduated cylinder (Reducing fluid level in the
TransFlow from 16–12).
Note: DO NOT add additional transmission fluid until the 4 quarts of oil have been removed from the transmission
(Reducing fluid level in the TransFlow from 12–8).
18.2. Repeat step 19.1.
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18.3. Add a maximum of 5 quarts of HP Fluid to the transmission while allowing 5 additional quarts of oil to fill the DTgraduated bucket (Reducing fluid level in the TransFlow from 8–3).
18.4. Shut the engine off once 16 quarts of oil have been collected.
18.5. Properly dispose of the collected transmission fluid.
19. Raise the vehicle.
20. Remove the DT-52263-2 Cooler Line Plug from rear differential and install the transmission oil cooler line using a
new retainer clip.
21. Remove the DT-52263-4 from the transmission oil cooler line.
22. Install the transmission oil cooler line using a new retainer clip.
23. Partially lower the vehicle.
24. Using care, shift the transmission through all forward ranges and Reverse.
24.1. Get the transmission fluid temperature to the proper temperature.
24.2. Raise the vehicle and remove the DT-51190/DT-45096-31 assembly.
24.3. Install the level set plug and tighten to 9 Nm (80 lb in).
The TCC shudder condition should be directional improved immediately after the fluid exchange procedure. It may take
up to 320 km (200 mi) for the TCC shudder condition to be eliminated. It is not a requirement for the dealer to drive the
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N192217820 Torque Converter Shudder/Shake
vehicle 320 km (200 mi). The customer should be advised that the full effect will take up to 320 km (200 mi) and a minimum
of two cold to operating temperature drive cycles.
Fluid Exchange Procedure - CT6
1.
Fill the DT-45096 with 24 quarts of HP fluid.
2.
Raise the vehicle.
3.
Using care, remove the transmission oil pan and drain the transmission fluid.
4.
Install the transmission oil pan.
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5.
Install the DT-45096-31 adapter (1) to the DT-51190 fluid fill adapter (2).
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6.
Remove the level set plug (1) from the transmission oil pan.
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Important: DO NOT overtighten the DT-51190 as it can be damaged by excessive torque. Do not exceed 9 Nm (80 lb
in).
7.
Install the DT-51190/DT-45096-31 assembly and hand tighten.
8.
Connect the TransFlow fluid feed (supply) line (3) to the DT-45096-31 adapter (2).
9.
Connect the DT-45096 TransFlow to the vehicle battery 12 volts and connect shop air to the air connection.
10. Switch the DT-45096 TransFlow to Flow and fill the transmission with 8 quarts of transmission fluid.
10.1. Switch the DT-45096 TransFlow to idle.
11. Partially lower the vehicle and run the transmission through all 8 forward gears, Reverse and Neutral.
12. Repeat steps 2-4 and 9-10 for 2nd drain and fill.
13. Repeat step 2-3, clean the transmission oil pan and magnet, repeat step 4 and step 10-11.
14. Perform the Transmission Fluid Level and Condition Check outlined below in this procedure:
14.1. Get the transmission fluid temperature to the proper temperature.
14.2. Raise the vehicle and remove the DT-51190/DT-45096-31 assembly.
14.3. Install the level set plug and tighten to 9 Nm (80 lb in).
The TCC shudder condition should be directional improved immediately after the fluid exchange procedure. It may take
up to 320 km (200 mi) for the TCC shudder condition to be eliminated. It is not a requirement for the dealer to drive the
vehicle 320 km (200 mi). The customer should be advised that the full effect will take up to 320 km (200 mi) and a minimum
of two cold to operating temperature drive cycles.
Dealer Responsibility
Dealers must take the steps necessary to ensure that the service update correction has been made to all involved vehicles
in dealer inventory before selling or dealer-trading the vehicle, but no later than August 31, 2020.
All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers' possession
and subject to this bulletin must be held and inspected/repaired per the service procedure of this bulletin before customers
take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealer-traded,
released to auction, used for demonstration, or any other purpose.
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All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System
(CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting
an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified
for sale within the CPOIS system, or once again be used in the CTP program.
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 tools, equipment, 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 dealer for information on whether your
vehicle may benefit from the information.
We Support
Voluntary Technician
Certification
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GLOBAL SAFETY FIELD INVESTIGATIONS
DCS5105
URGENT - DISTRIBUTE IMMEDIATELY
Date:
August 1, 2019
Subject: N192217820 - Service Update
Torque Converter Shudder/Shake
Inventory Only Vehicles
Models: 2016-2019 Cadillac
ATS
2016-2018 Cadillac CT6
2018 Cadillac CT6 CSAV
2016-2019 Cadillac CTS
2015-2017 Cadillac Escalade
2017-2019 Chevrolet Colorado
2018-2019 GMC Canyon
Equipped with 8-Speed Transmission (RPO M5N, M5U, M5T, M5X, or
MQE)
To:
All General Motors Dealers
General Motors is releasing Service Update N192217820 today. The total
number of U.S. vehicles involved is approximately 3,800. Please see the
attached bulletin for details.
Global Warranty Management (GWM)
The Required Field Action section on the Investigate Vehicle History (IVH) screen will
be updated August 2, 2019. A list of involved vehicles in dealer new inventory is
attached to this message. Please hold all warranty transactions until IVH has been
updated.
END OF MESSAGE
GLOBAL SAFETY FIELD INVESTIGATIONS
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TSB/Document ID: N192217820
Replacement Service Bulletin Number:
MFR Communication Date: 2019-08-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
MFR Component System:
MFR Component Subsystem:
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