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GMC TSB #PIT5544F
2021 GMC Sierra 3500
TSB Document:
Affected Component: STEERING
- Summary
- This Preliminary information communicates information on a hydrauilc rush type noise from the power steering gear. This noise is a characteristic of the new Active Hydraulic Assist System RPO NV8 and no repairs should be made.  The noise is most noticeable in the cab at idle, in park, with all accessories turned off.
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