| Subject: | Harsh Shift, Delayed Shift, Unwanted Downshift, Transmission Stuck in One Gear, Erratic Shifting, Hesitation or Have a Malfunction Indicator Lamp (MIL) Illuminated - DTC P0747, P0777, P0797, P2715 or P2724 May Be Set Current or History in Transmission Control Module |
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Brand: |
Model: |
Model Year: |
VIN: |
Engine: |
Transmission: | ||
|---|---|---|---|---|---|---|---|
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from |
to |
from |
to | ||||
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Cadillac |
ATS |
2017 |
2017 |
SOP |
December 6, 2016 |
Automatic 8L45, 8L90 (M5T, M5N, M5U, M5X) |
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CTS |
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CT6 |
November 17, 2016 |
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Escalade |
December 16, 2016 |
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Chevrolet |
Camaro |
2017 |
2017 |
SOP |
December 6, 2016 |
Automatic 8L45, 8L90 (M5T, M5N, M5U, M5X) |
|
|
Corvette |
December 8, 2016 |
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Silverado |
December 16, 2016 |
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Suburban |
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Tahoe |
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GMC |
Sierra |
2017 |
2017 |
SOP |
December 16, 2016 |
Automatic 8L90 (M5U, M5X) |
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|
Yukon |
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Involved Region or Country |
North America and N.A. Export Regions |
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Condition |
Some customers may comment that one or more of the following conditions:
The technician may find one or more of the following DTCs set:
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Cause |
This condition may be caused by a calibration anomaly in the Transmission Control Module (TCM). |
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Correction |
If you encounter a vehicle with the above concern, reprogram the Transmission Control Module (TCM) with the latest software available on TIS2WEB. |
For vehicles repaired under warranty, use:
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Labor Operation |
Description |
Labor Time |
|---|---|---|
|
2810175 |
Transmission Control Module Reprogramming with SPS |
Use Published Labor Operation Time |
Important: Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. 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.
Note: After updating the TCM, complete K71 Transmission Control Module – Setup to run the Service Fast Learn procedure.
Update the TCM to the latest software and calibration available on TIS2WEB. Refer to K71 Transmission Control Module: Programming and Setup in SI.
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Version |
2 |
|
Modified |
April 7, 2017 - Updated the Subject and Condition sections. |
Article ID: 1353
Created: April 8, 2017
Last Updated: April 8, 2017
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/2017-corvette-service-bulletin-16-na-404-harsh-shift-delayed-shift-unwanted-downshift-transmission-stuck-in-one-gear-erratic-shifting-hesitation-or-have-a-malfunction-indicator-lamp-mil-illuminated-1353.html