GMC TSB #PIP5480A
2017 GMC Sierra
Affected Component: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
- Summary
- This Preliminary Information communication provides information to the technician about an ECM calibration update to address ahesitation, bump, chuggle, jerk or a feeling of harshness between 25 and 45 MPH, light acceleration with the transmission in 3rdgear. This PI updated from engineering aware of concern to valid calibration covered in TSB 17-NA-171.