Affected Component: TRAILER HITCHES

Date Published
OCT 06, 2022
NHTSA TSB #
10226361
TSB Document
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.