2017 Corvette: Service Bulletin: #17098: Service Update - 8-Speed Transmission Check Engine Light - (Mar 23, 2017)

#17098: Service Update - 8-Speed Transmission Check Engine Light - (Mar 23, 2017)

Subject:	17098 – 8-Speed Transmission Check Engine Light
Models:	2017 Cadillac ATS, CTS, CT6, Escalade, Escalade ESV
	2017 Chevrolet Camaro, Corvette, Silverado
	2017 GMC Sierra, Yukon, Yukon XL

*Reference Number:* N172085320	Release Date: March 2017
Revision: 00

Attention:

This service update involves vehicles in dealer inventory only and will expire March 31, 2018.

*Make*	*Model*	*Model Year*		*RPO*	*Description*
		*From*	To
Cadillac	ATS	2017	2017	M5U M5X M5N M5T	TRANSMISSION-AUTO 8 SPD, 8L90 TRANSMISSION-AUTO 8 SPD, 8L90, BAS+ TRANSMISSION-AUTO 8 SPD, 8L45, BAS+ TRANSMISSION-AUTO 8 SPD, 8L90
	CTS
	CT6
	Escalade
	Escalade ESV
Chevrolet	Camaro
	Corvette
	Silverado
GMC	Sierra
	Yukon
	Yukon XL

This service update should be performed on vehicles in dealer inventory only. Involved vehicles are marked “open” on the Investigate Vehicle History screen 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

Certain 2017 model year various make and model vehicles may have a condition where a false failure action is being taken when it is not required. This condition can result in the transmission holding the last known safe gear for 6 seconds. A malfunction indicator lamp (MIL) is set when this default happens more than 2 times, and reduced propulsion can happen for all 8-speed transmission applications.

Correction

Dealers will reprogram the transmission control module (TCM).

Parts Information: No parts are required for this repair.

Warranty Information

Labor Operation	Description	Labor Time	Trans. Type	Net Item
9102907*	Transmission Control Module Reprogramming with SPS	0.5	ZFAT	N/A

* To avoid warranty transaction rejections, the SPS Waranty Claim Code must be entered when submitting this transaction.

Service Procedure

Note: Carefully read and follow the instructions below.

DO NOT attempt to order the calibration number from GM Customer Care and Aftersales. The calibration numbers required for this service procedure are programmed into control modules via a Multiple Diagnostic Interface (MDI) with the calibration update. If you cannot access the calibration, call the Techline Customer Support Center and it will be provided.
DO NOT program a control module unless directed to by a service procedure or a service bulletin. If the control module is not properly configured with the correct calibration software, the control module will not control all of the vehicle features properly.
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.
During the programming procedure, follow the SPS prompts for the correct ignition switch position.
Refer to Transmission Control Module Programming and Setup for additional information on programming.

Reprogram the transmission control module. Refer to Transmission Control Module Programming and Setup in SI.
Record SPS Warranty Claim Code on job card for warranty transaction submission.

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 March 23, 2018.

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.

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.

Article ID: 1343
Created: March 24, 2017
Last Updated: March 24, 2017
Author: Rob Loszewski

Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article.php?id=1343