# Service bulletin PIT5311F

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: 10178359
- Published by NHTSA: 2020\-08\-10
- Manufacturer's number: PIT5311F
- Manufacturer's date: 2020\-06\-29
- NHTSA component: ELECTRICAL SYSTEM:WIRING; ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL

## 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/2020/MC-10178359-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178359-9999.pdf)

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

## Components

Electrical system, Wiring and fuses

## Vehicles listed

- 2014 to 2019 CHEVROLET SILVERADO 1500
- 2019 CHEVROLET SILVERADO 2500
- 2019 CHEVROLET SILVERADO 3500
- 2015 to 2020 CHEVROLET SUBURBAN
- 2015 to 2020 CHEVROLET TAHOE
- 2014 to 2019 GMC SIERRA 1500
- 2019 GMC SIERRA 2500
- 2019 GMC SIERRA 3500
- 2015 to 2020 GMC YUKON
- 2015 to 2019 GMC YUKON DENALI
- 2015 to 2018 GMC YUKON DENALI XL
- 2015 to 2020 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.
- [22\-NA\-109](/bulletins/10213515.md), 2022-06-06, Service bulletin: ELECTRICAL SYSTEM; EXTERIOR LIGHTING; ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS. This informational bulletin provides information on Information on Common Customer Trailer Side Faults.
- [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
- [21NA149](/bulletins/10205552.md), 2021-12-27, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM:WIRING. This technical bulletin provides repair information to correct a customer concern of Engine Wire Harness Chafing.
- [21NA149](/bulletins/10200147.md), 2021-08-09, Service bulletin: ELECTRICAL SYSTEM:WIRING; ENGINE. This technical bulletin provides repair information to correct a customer concern of Engine Wire Harness Chafing.
- [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.
- [PIT5750](/bulletins/10178314.md), 2020-08-10, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:WIRING. This Preliminary information communicates an issue with the battery goes dead and provides diagnostics tips on inspecting the LIN bus.
- [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

JSON: [/v1/bulletins/10178359](/v1/bulletins/10178359)

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