# Service bulletin PIT5311C

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.

- Type: Service bulletin
- NHTSA id: 10113309
- Published by NHTSA: 2017\-08\-15
- Manufacturer's number: PIT5311C
- Manufacturer's date: 2017\-01\-09
- NHTSA component: ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:WIRING

## NHTSA's summary

This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have an intermittent "Check Trailer Wiring" or "Service Trailer Brake" message on the Driver Information Center. Technician will inspect and clean the ground wire \(normally white wire\) connection on the trailer side of the 7\-pin connector. Inspect that the wires inside the trailer side connector are clean and securely fastened. If the vehicle?s 7\-way connector socket terminals are deformed or have excessive wear, it will be necessary to replace the truck side connector with part number 23404450.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10113309-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10113309-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Wiring and fuses

## Vehicles listed

- 2017 CHEVROLET SILVERADO
- 2014 CHEVROLET SILVERADO 1500
- 2015 to 2016 CHEVROLET SILVERADO 2500
- 2015 to 2017 CHEVROLET SUBURBAN
- 2015 to 2017 CHEVROLET TAHOE
- 2017 GMC SIERRA
- 2014 GMC SIERRA 1500
- 2015 to 2016 GMC SIERRA 2500
- 2015 to 2016 GMC SIERRA DENALI
- 2015 to 2017 GMC YUKON
- 2015 to 2017 GMC YUKON XL

## Recalls for the same vehicles and component

- [14V265000](/recalls/nhtsa/14V265000.md), 2014-05-20: ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS

## Other bulletins for the same vehicles and component

- [22860](/bulletins/10248438.md), 2024-01-08, Service bulletin: ELECTRICAL SYSTEM:WIRING; SERVICE BRAKES. Harness Trapped Under MBEC
- [130089008](/bulletins/10246630.md), 2023-12-11, Service bulletin: ELECTRICAL SYSTEM:WIRING. GM Wiring Repair Strategy Information
- [PIT5222](/bulletins/10245915.md), 2023-12-04, Service bulletin: SEATS; ELECTRICAL SYSTEM:WIRING:CONNECTORS/PLUGS:ACCESORY POWER OUTLET/JACK/PORT/USB/SAE/CIGARETTE LIGHTER. Center Seat Accessory Power Outlet Inoperative.
- [PIT5556A](/bulletins/10211771.md), 2022-05-16, Service bulletin: ELECTRICAL SYSTEM:WIRING. This Preliminary information communicates an issue where the chassis wiring harness can chaff on the underbody of the vehicle causing a wide varied of issues, depending on which wire\(s\) is chaffed. Repair the affected wiring as needed
- [17\-NA\-219](/bulletins/10190267.md), 2021-04-14, Service bulletin: ELECTRICAL SYSTEM:WIRING. Diagnostic Tip for Malfunction Indicator Lamp \(MIL\) Illuminated \- DTC P249D, P249E, U029D, U029E Set Some customers may comment that the MIL is illuminated. The technician may find one or more of the following DTCs set: • U029D • U029E • P249D • P249E Note: The graphic above depicts an example of a torn and missing seal. • Moisture intrusion past a damaged \(1\) seal located in the connector for the NOx sensor wiring harness. • Missing \(2\) seal located in the connector for the NOx sensor wiring harness. Correction If you encounter a vehicle with the above concern, perform normal diagnostics for the codes set. \&\#8658; If diagnostics lead to NOx sensor replacement, inspect the mating chassis electrical connector for corrosion. Clean and repair as necessary.
- [PIT5311F](/bulletins/10178359.md), 2020-08-10, Service bulletin: ELECTRICAL SYSTEM:WIRING; ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL. This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that may have an intermittent "Check Trailer Wiring" or "Service Trailer Brake" message on the Driver Information Center. Technician will inspect and clean the ground wire \(normally white wire\) connection on the trailer side of the 7\-pin connector. Inspect that the wires inside the trailer side connector are clean and securely fastened. If the vehicle?s 7\-way connector socket terminals are deformed or have excessive wear, it will be necessary to replace the truck side connector with part number 23404450.
- [PIT5556A](/bulletins/10173717.md), 2020-04-13, Service bulletin: SUSPENSION; ELECTRICAL SYSTEM:WIRING; STEERING. This Preliminary information communicates an issue where the chassis wiring harness can chaff on the underbody of the vehicle causing a wide varied of issues, depending on which wire\(s\) is chaffed. Repair the affected wiring as needed
- [100089005G](/bulletins/10159575.md), 2019-05-13, Service bulletin: ELECTRICAL SYSTEM:WIRING. This warranty admin bulletin explains to the technician additional information may be needed when submitting transactions when doing wiring repairs.
- [PIE0499B](/bulletins/10158873.md), 2019-04-22, Service bulletin: FUEL SYSTEM, OTHER:STORAGE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ELECTRICAL SYSTEM:WIRING. This engineering informational bulletin is requesting information and document the exact location of the wire chafing by taking a photo of the flex fuel pigtail as it appears BEFORE repairs are made.
- [PIE0499](/bulletins/10155064.md), 2019-03-25, Service bulletin: ELECTRICAL SYSTEM:WIRING; FUEL SYSTEM, GASOLINE. This engineering informational bulletin is requesting information and document the exact location of the wire chafing by taking a photo of the flex fuel pigtail as it appears BEFORE repairs are made.

JSON: [/v1/bulletins/10113309](/v1/bulletins/10113309)

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