Service bulletins for the 2018 GMC Sierra
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
1723 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Power steering are shown. Show all
| PIT5544B | 2018-11-13. Service bulletin. STEERING; STEERING:ELECTRIC POWER ASSIST SYSTEM. This Preliminary information communicates information on ahydrauilc 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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| PIE0430 | 2018-06-11. Service bulletin. STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID. This engineering informational bulletin is requesting information from the field on vehicles that have the condition of a service power steering message displayed and or a power steering fluid leak. |
| 18075 | 2018-06-04. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY; STEERING:HYDRAULIC POWER ASSIST:HOSE, PIPING, AND CONNECTIONS. 18075 - Service Update. Certain vehicles equipped with an auxiliary battery (RPO K4B) may have the ?buddy clip? to the high-pressure power steering hose and two other clips for the auxiliary negative battery cable not attached consistently during assembly process. Inspect the ?buddy clip? and two auxiliary negative battery cable attachments and secure if required. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.