18237: Emission – TCM Software Potential Emissions Noncompliance – 2017-2018 Cadillac XT5

#18237: Emission – TCM Software Potential Emissions Noncompliance – (Aug 9, 2018)

Subject: 18237 TCM Software Potential Emissions Noncompliance
Models: 2017–18 Cadillac XT5

Reference Number: N182163380 Release Date: August 2018
Revision: 00
Make Model Model Year RPO Description
From To
Cadillac XT5 2017 2018 MRC 8 Speed Transmission

Involved vehicles are identified on the Applicable Warranties section in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition General Motors has decided to conduct a voluntary emissions recall involving certain 2017-2018 model year Cadillac XT5 vehicles equipped with an 8-speed transmission (RPO MRC) that were service programmed with incorrect transmission control module, (TCM) software. Vehicles programmed with this software may, under certain downhill driving conditions, remain stuck in gear or shift up later than expected, after RPMs (Revolutions Per Minute) are already high. This condition can only be cleared by an ignition key cycle (turning the vehicle off and then back on again) or by shifting the vehicle into and out of Neutral.
Correction Dealers are to reprogram the TCM.


Parts Information

No parts are required for this repair.


Warranty Information

Labor Code Description Labor Time Trans. Type Net Item
9103850* Transmission Control Module Reprogramming with SPS 0.7 ZFAT N/A

* To avoid warranty transaction rejections, the SPS Warranty Claim Code(s) must be entered when submitting this transaction.


Warranty Claim Code Information Retrieval

If the SPS Warranty Claim Code was not recorded on the Job Card, the code can be retrieved in the SPS system as follows:

  • Open TIS on the computer used to program the vehicle.
  • Select and start SPS.
  • Select Settings.
  • Select the Warranty Claim Code tab.

The VIN, Warranty Claim Code and Date/Time will be listed on a roster of recent programming events. If the code is retrievable, dealers should resubmit the transaction making sure to include the code in the SPS Warranty Claim Code field.


Service Procedure

Note: Carefully read and follow the instructions below.

  • Ensure the programming tool is equipped with the latest software and is securely connected to the data link connector. If there is an interruption during programming, programming failure or control module damage may occur.
  • Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. When required install the EL-49642 SPS Programming Support Tool to maintain system voltage. If not available, connect a fully charged 12 V jumper or booster pack disconnected from the AC voltage supply. DO NOT connect a battery charger.
  • Turn OFF or disable systems that may put a load on the vehicles battery such as; interior lights, exterior lights (including daytime running lights), HVAC, radio, etc.
  • Clear DTCs after programming is complete. Clearing powertrain DTCs will set the Inspection/Maintenance (I/M) system status indicators to NO.

Same Calibration/Software Warning

Note: If the Same Calibration/Software Warning is noted on the SPS controller screen, select “OK” and continue programming.

  1. Reprogram transmission control module. Refer to K71 Transmission Control Module: Programming and Setup in SI.
  2. Record SPS Warranty Claim Code on job card for warranty transaction submission.
  3. CALIFORNIA VEHICLES ONLY: Complete a “Proof of Correction” certificate and provide to the vehicle owner upon recall completion.


Dealer Responsibility

All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers’ possession and subject to this program 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.

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.

Dealers are to service all vehicles subject to this program at no charge to customers, regardless of mileage, age of vehicle, or ownership, from this time forward.

Customers who have recently purchased vehicles sold from your vehicle inventory, and for which there is no customer information indicated on the dealer listing, are to be contacted by the dealer. Arrangements are to be made to make the required correction according to the instructions contained in this bulletin. A copy of the customer letter is provided in this bulletin for your use in contacting customers. Recall follow-up cards should not be used for this purpose, since the customer may not as yet have received the notification letter.

In summary, whenever a vehicle subject to this program enters your vehicle inventory, or is in your dealership for service in the future, you must take the steps necessary to be sure the program correction has been made before selling or releasing the vehicle.



When a California emissions recall is completed by a GM dealer, the dealer must provide the vehicle owner a “Proof of Correction Certificate” which the owner may need to present to the California Department Of Motor Vehicles (DMV) when renewing their vehicle registration. Without this correction certificate, the owner may be unable to renew their vehicle registration.

Additional Certificates can be obtained, at no charge, from the 1Store application in GlobalConnnect. Request GM Item Number 1825 when ordering.


Dealer Reports

For dealers with involved vehicles, a listing with involved vehicles has been prepared and will be provided to U.S. and Canadian dealers through the GM GlobalConnect Recall Reports, or sent directly to export dealers. The listing may contain customer names and addresses obtained from Motor Vehicle Registration Records. The use of such motor vehicle registration data for any purpose other than follow-up necessary to complete this recall is a violation of law in several states/provinces/countries. Accordingly, you are urged to limit the use of this report to the follow-up necessary to complete this recall.


Courtesy Transportation — For USA & Canada

Courtesy transportation is available for customers whose vehicles are involved in a product program and still within the warranty coverage period. See General Motors Service Policies and Procedures Manual, Sections 1.4 and 6.1.10, for courtesy transportation program details.


Customer Notification

USA & Canada – General Motors will notify customers of this recall on their vehicle (see copy of customer letter included with this bulletin).

In order to ensure full protection under the emission warranty, and the right to participate in future recalls, the customer notification letter recommends that customers have their vehicles serviced as soon as possible. It also advises that failure to do so could legally be determined to be lack of proper maintenance. [DO Not include the following sentences in Vehicle Emission Control Label Recall Bulletins] The vehicle may fail a state or local emission inspection test if the recall work is not completed.

Export – Letters will be sent to known owners of record located within areas covered by the US National Traffic and Motor Vehicle Safety Act. For owners outside these areas, dealers should notify customers using the attached sample letter.

August 2018

This notice applies to your vehicle, VIN:______________________________

Dear General Motors Customer:

This notice is sent to inform you that General Motors is conducting a voluntary emission recall that includes your vehicle.

Reason For This Recall: Your vehicle may have been programmed during servicing with incorrect transmission control module (TCM) software. Vehicles programmed with this software may, under certain downhill driving conditions, remain stuck in gear or shift up later than expected, after RPMs (Revolutions Per Minute) are already high. This condition can only be cleared by an ignition key cycle (turning the vehicle off and then back on again) or by shifting the vehicle into and out of Neutral.

What Will Be Done: Your GM dealer will reprogram your transmission control module (TCM). This service will be performed for you at no charge. Eligibility for the TCM reprogramming will not be denied solely due to your vehicle having non-GM parts or repairs performed by outlets other than GM franchised dealers.

How Long Will The Repair Take? Because of service scheduling requirements, it is likely that your dealer will need your vehicle longer than the actual service correction time of approximately 45 minutes.

What You Should Do: Please contact your GM dealer as soon as possible to arrange a service date and to assure parts availability. Instructions for making this correction have been sent to your dealer. Please ask your dealer if you wish to know how much time will be needed to schedule, process, and repair your vehicle.

If you have any questions or need any assistance, just contact your dealer or the appropriate Customer Assistance Center at the number listed below.

Division Number Text Telephones (TTY)
Cadillac 1–866–982–2339 1–800–833–2622
Puerto Rico – English 1-800-496-9992
Puerto Rico – Español 1-800-496-9993
Virgin Islands 1-800-496-9994

Emission Warranty Information: In order to assure your full protection under the emission warranty provisions, it is recommended that you have your vehicle serviced as soon as possible. Failure to do so could legally be determined as lack of proper maintenance of your vehicle. Failure to reprogram the TCM may cause your vehicle to fail a state or local emission inspection or I/M smog check test.



The California Air Resources Board (CARB) requires vehicle emission recalls be completed prior to California registration renewal. Uncorrected emission recalls will result in the inability to renew your California vehicle registration.

At the time of emission recall completion, your California dealer will issue a “Proof of Correction Certificate”. Keep this certificate and, if required, present it to the Department of Motor Vehicles when renewing your California registration as proof of recall completion.

We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our products.

Maryann L. Combs

Vice President

Global Vehicle Safety

GM Recall: 18237


GM Diagnostic/Programming (TIS2Web)

Approved J2534 Device with TIS2WEB can reprogram 1996 and later All GM Modules.

To obtain the latest electronic controller calibration information for your vehicle, go to https://tis2web.service.gm.com/tis2web and enter the vehicle’s 17 character Vehicle Identification Number (VIN) and select ‘Get CAL ID’.

You can then compare the latest part number with the actual number installed on the vehicle to determine if a reprogram is needed.

The Service Programming System (SPS) application is part of the TIS2Web system. To program an ECU, the SPS application must communicate with the vehicle control modules using the proper J2534 programming interface tool.

The following are the supported interface tools:

OEM GM Tech 2 Dealer Package
Bosch GM MDI 2 (2nd Gen) MDI2 interface
Drew Tech CarDaq-Plus 2 SAE J2534-1/2 Reflash Reprogramming Tool OEM Diagnostics
Drew Technologies (DRWCDPLUSKIT) CarDAQ-Plus J2534 Flash Reprogramming Kit
Drew Tech CarDaq-M 2 SAE J2534-1/2 Reflash Reprogramming Tool OEM Diagnostics

Drew Technologies (DRWMONGGM) Mongoose GM Vehicle Interface (VPW/CAN) J2534

VSI J2534 ECU Reprogrammer & Diagnostic Adapter
Autel (AULMF2534) MaxiFlash Pro
Dearborn d-Bridge Adapter J2534 OBDII Engineering Tool

The Tech 2 supports model years 1996 and beyond. With the addition of the CAN Diagnostic Interface (CANdi) module, Tech 2 is fully backward compatible with current Tech 2 functionality and operates transparently when diagnosing non-CAN-equipped vehicles.

Servicing the next generation Global A vehicles will require the diagnostic software, GDS2, Global Diagnostic System 2 running on a local PC device while the MDI is connected to the vehicle.

The GM MDI is the Global Diagnostic tool for future vehicles starting with Global A vehicles. The GM MDI was introduced in the fall of 2007 for Pass-Thru programming and offers faster programming speed. It can be used to perform Pass-Thru programming on all vehicles built since 1996 and into the future. Click here to view a list of GDS supported vehicles.



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