# Service bulletin PIT5311E

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: 10160665
- Published by NHTSA: 2019\-06\-03
- Manufacturer's number: PIT5311E
- Manufacturer's date: 2019\-04\-15
- NHTSA component: SERVICE BRAKES; ELECTRICAL SYSTEM

## 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/2019/MC-10160665-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10160665-9999.pdf)

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

## Components

Brakes, Electrical system

## Vehicles listed

- 2014 to 2019 CHEVROLET SILVERADO 1500
- 2019 CHEVROLET SILVERADO 2500
- 2019 CHEVROLET SILVERADO 3500
- 2015 to 2019 CHEVROLET SUBURBAN
- 2015 to 2019 CHEVROLET TAHOE
- 2014 to 2019 GMC SIERRA 1500
- 2019 GMC SIERRA 2500
- 2019 GMC SIERRA 3500
- 2015 to 2019 GMC YUKON DENALI

## Recalls for the same vehicles and component

- [25V768000](/recalls/nhtsa/25V768000.md), 2025-11-06: SERVICE BRAKES, HYDRAULIC:POWER ASSIST
- [25V390000](/recalls/nhtsa/25V390000.md), 2025-06-12: SERVICE BRAKES, HYDRAULIC:BRAKE FLUID LOW WARNING:SWITCH/SENSOR/FLOAT
- [2024294](/recalls/tc/2024294.md), 2024-05-24: Electrical
- [2021407](/recalls/tc/2021407.md), 2021-07-01: Electrical
- [2020459](/recalls/tc/2020459.md), 2020-10-01: Brakes
- [20V603000](/recalls/nhtsa/20V603000.md), 2020-10-01: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM
- [2020034](/recalls/tc/2020034.md), 2020-01-30: Brakes
- [20V055000](/recalls/nhtsa/20V055000.md), 2020-01-30: SERVICE BRAKES, HYDRAULIC:POWER ASSIST
- [2019631](/recalls/tc/2019631.md), 2019-12-12: Electrical
- [2019630](/recalls/tc/2019630.md), 2019-12-12: Brakes

## Other bulletins for the same vehicles and component

- [N252515590](/bulletins/11027795.md), 2026-01-27, Service campaign: ELECTRICAL SYSTEM. Certain vehicles listed above, may have a condition in which the body\-to\-chassis ground strap may be corroded. Dealers will replace the ground strap.
- [23\-NA\-170](/bulletins/11024486.md), 2025-10-25, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This bulletin advises the tech to inspect deeper into what may be to main cause of an engine failure.
- [23\-NA\-201](/bulletins/11024378.md), 2025-10-21, Service bulletin: SERVICE BRAKES; ELECTRICAL SYSTEM; STEERING. This service bulletin advises the technician of a possible loose ground that may be causing customer concerns of Loss of Steering Assist and/or Loss of Brake Assist and Malfunction Indicator Lamp \(MIL\) Illuminated.
- [18\-NA\-180](/bulletins/11024324.md), 2025-10-16, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information.
- [22\-NA\-161](/bulletins/11023368.md), 2025-09-27, Service bulletin: ELECTRICAL SYSTEM; VISIBILITY/WIPER. This informational bulletin provides information for dealers/technicians on power folding mirrors do not fold at the same speed.
- [18\-NA\-180](/bulletins/11023365.md), 2025-09-26, Service bulletin: ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM. This Warranty Administration service bulletin provides Lithium\-Ion battery Exchange Process and Transaction Submission information.
- [25\-NA\-087](/bulletins/11017595.md), 2025-05-02, Service bulletin: ELECTRICAL SYSTEM. This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs, such as Wiring Harness Repairs.
- [21\-NA\-139](/bulletins/11017443.md), 2025-05-01, Service bulletin: ELECTRICAL SYSTEM; ENGINE. This service bulletin provides a repair procedure to correct a customer concern of a Malfunction Indicator Lamp \(MIL\) Illuminated \- DTC P3055 Set.
- [23\-NA\-185](/bulletins/11017255.md), 2025-04-28, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM; STEERING. This service bulletin helps diagnose/reduce possible CCND issues on Transfer Cases \- Service 4WD on DIC, Intermittent Failures, Noise Concerns, Driveline/Steering Vibration/Shudder, Intermittent DTCs/MIL Illuminated, Engagement/Disengagement/Ratcheting Concerns.
- [23\-NA\-001](/bulletins/11017252.md), 2025-04-28, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.

JSON: [/v1/bulletins/10160665](/v1/bulletins/10160665)

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