6L80 Automatic Transmission 4-5 Upshift Slip/Flare Resulting in a Harsh Shift or Clunk, MIL Illuminated, DTC P0756 Set (Reprogram Transmission Control Module (TCM))
| Subject: | 6L80 Automatic Transmission 4-5 Upshift Slip/Flare Resulting in a Harsh Shift or Clunk, MIL Illuminated, DTC P0756 Set (Reprogram Transmission Control Module (TCM)) |
| Models: | 2007 Cadillac Escalade, Escalade ESV, Escalade EXT |
| 2007 GMC Yukon Denali, Yukon Denali XL |
| with 6L80 Automatic Transmission (RPO MYC) |
This bulletin is being revised to update the correction information. Please discard Corporate Bulletin Number 06-07-30-010B (Section 07 -- Transmission/Transaxle).
Plant | VIN Breakpoint |
|---|---|
Arlington | 7R141629 |
Janesville | 7J125624 |
Condition
Some customers may comment on the following conditions:
| • | A 4-5 upshift slip/flare that results in a harsh shift or clunk at the end of the shift. |
| • | An illuminated MIL where a DTC P0756 is found as a history code in the TCM. |
Correction
A revised transmission calibration has been developed to address both of these issues. Reprogram the TCM with an updated software calibration. This new service calibration was released with TIS satellite data update version 3.5 or later, available March 20, 2006 (March 22 in Canada). As always, make sure your Tech 2® is updated with the latest software version.
After reprogramming the TCM, Service Fast Learn Adapts must be performed using the Tech 2®. Check and clear all DTCs that may have set as a result of the programming process.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
K9509* | Transmission Control Module - Transmission Reprogramming with SPS | 0.4 hr |
Add: | Diagnosis Time | 0.0-0.3 hr |
*This labor operation number is for bulletin use only. This number will not be published in the Labor Time Guide. | ||
