Some 2017 Silverado and Sierra models equipped with the Duramax Diesel 6.6L V8 engine (RPO L5P) (Fig. 20) may have a hesitation, bump, harsh shifts or other related conditions. Any of the following DTCs may be set: P0097, P0128, P0181, P0263, P0266, P0269, P0272, P0275, P0278, P0281, P0284, P040C, P040D, P041C, P041D, P0483, P054F, P10D1, P11CC, P22FE, P24C7, P2635, P2636, or P2BAA.
Fig. 20
If these conditions are found, reprogram the Engine Control Module (ECM) and Transmission Control Module (TCM) with the latest calibrations available using the Service Programming System (SPS). Both the ECM and TCM must be updated to the latest software. Not updating both modules may result in additional undesired vehicle performance.
If the ECM and TCM have the latest calibrations, follow the diagnostic procedures for the set DTC in the appropriate Service Information.
– Thanks to John Stempnik
