DTC P0751 P0756 P0776 P0P96 P2714 P2723 Harsh TCC Engagement - keywords chuggle code converter shudder TCC
| Subject: | DTC P0751, P0756, P0776, P0796, P2714, P2723, Harsh TCC Engagement |
| Models: | 2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT, STS-V, XLR |
| 2006-2008 Chevrolet Corvette |
| 2007-2008 GMC Sierra Denali, Yukon Denali, Yukon Denali XL |
| Equipped With 6L80 (RPO MYC) Automatic Transmission |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may comment on a transmission concern where the MIL is illuminated and any of the above listed DTCs may be found in the TCM as active or history codes. They may also comment on harsh TCC engagement and debris may be found in the transmission oil pan.
Recommendation/Instructions:
If diagnosis leads to transmission removal inspect the torque converter face for signs of a high temperature witness mark as shown in the photo below. This witness mark will continue 360 degrees around the face of the converter and be blue / black in color.
If this condition is found please contact TAC at the number you have been provided. Do not disassemble the transmission beyond removal of the oil pan.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
