GMC TSB #PIP5587
2019 GMC Sierra 1500
Affected Component: ENGINE AND ENGINE COOLING
- Summary
- This Preliminary information communicates A vehicle may come into the dealer with a lean running concern and/or air leak noise from the PCV.The air rush or whistlingnoise is caused by the fixed orifice PCV.There is not a correction for this noiseand should be considered to be normal.