WenmarOpen by Wenmar Pro

Service bulletin PIE0383

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10135299
Published by NHTSA2018-05-07
Manufacturer's numberPIE0383
Manufacturer's date2016-10-17
NHTSA componentTRAILER HITCHES

NHTSA's summary

This engineering informational bulletin is requesting information from the field on vehicles that have the condition of a check trailer message displayed but there is no trailer connected.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Trailer hitch

Vehicles listed
CHEVROLET SILVERADO2017
CHEVROLET SILVERADO 15002014 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA2017
GMC SIERRA 15002014 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA 25002014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2015, 2016 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
130089007A2023-12-11. Service bulletin. Information on Recreational, Dinghy or Flat Towing Procedure
PIT5282B2023-12-04. Service bulletin. Installation Of An Aftermarket Trailer Brake Controller In Lieu Of Factory Trailer Brake Controller.
PIT52822023-12-04. Service bulletin. Installation Of An Aftermarket Trailer Brake Controller In Lieu Of Factory Trailer Brake Controller.
PIT5241C2023-12-04. Service bulletin. Adding Integrated Trailer Brake Controller RPO JL1.
PIT5241B2023-12-04. Service bulletin. Adding Integrated Trailer Brake Controller RPO JL1.
PIT52282023-12-04. Service bulletin. Interim Aftermarket Trailer Brake Controller Harness.
PIT4729E2023-11-20. Service bulletin. Adding Integrated Trailer Brake Controller RPO JL1.
PIT5509K2023-06-13. Service bulletin. This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.
PIT5509J2023-05-15. Service bulletin. This Preliminary Information communication provides information to the technician on how to diagnose and repair vehicle that may have a "Check Trailer Wiring" or "Service Trailer Brake System? message on the Driver Information Center when a trailer is connected to the vehicle. Diagnostic Trouble Code C1114 set in the Chassis Control Module. Chassis Control Module has to determine the type of trailer brake system that is being used. The Chassis Control Module can be sensitive to a variety of trailer wiring issues. The technician will need to make a trailer tester using Electric Trailer Brake Magnets and 7-way trailer connector to determine if it is a vehicle or trailer issue. If the concern is not duplicated with the tester installed, the vehicle is operating correctly and the focus should be on the trailer wiring or 7 way connector.
17-NA-3502023-05-05. Service bulletin. This informational bulletin provides explanation of a normal condition of a loose-fitting ball receiver in the gooseneck.