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
Estimated Reading Time: 2 Minutes#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 - DTC P0747, P0777, P0797, P2715 or P2724 May Be Set Current or History in Transmission Control Module - (Apr 7, 2017)
| 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) |
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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. |
- Warranty Information
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For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
2810175
Transmission Control Module Reprogramming with SPS
Use Published Labor Operation Time
- Service Procedure
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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 |
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Modified |
April 7, 2017 - Updated the Subject and Condition sections. |