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October 6, 2022 Service bulletin

Trailer hitches

Chevrolet technical service bulletin PIT5948A for 2022-2023 Chevrolet Silverado 1500, 2022-2023 Chevrolet Tahoe and 2022-2023 GMC Sierra 1500 and others.

Bulletin number
PIT5948A
Component
Trailer hitches
Summary
This Preliminary information communicates that when they connect a trailer to the truck that there is a Service Trailer Brake message displayed in the DIC. When checking for DTC's a C159C sym49 maybe set for the Trailer Brake Control Switch. GM Engineering is aware of the issue and working on a fix.

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