# Service bulletin 18NA301

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: 10155030
- Published by NHTSA: 2019\-03\-25
- Manufacturer's number: 18NA301
- Manufacturer's date: 2019\-01\-17
- NHTSA component: ELECTRICAL SYSTEM:WIRING:FUSES AND CIRCUIT BREAKERS; SUSPENSION

## NHTSA's summary

This technical bulletin provides a procedure to install higher amp fuses to correct the axle actuator high amperage draw.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10155030-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10155030-9999.pdf)

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

## Components

Electrical system, Suspension, Wiring and fuses

## Vehicles listed

- 2019 CHEVROLET SILVERADO 1500
- 2019 GMC SIERRA 1500

## Other bulletins for the same vehicles and component

- [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.
- [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.
- [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.
- [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.
- [PIP5660](/bulletins/10163663.md), 2019-08-12, Service bulletin: ENGINE; ELECTRICAL SYSTEM:WIRING. This Preliminary information communicates the possibility of a reduced power message with dtc p2101 and/or p1516 due to potential throttle body issue.
- [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.
- [100089005H](/bulletins/10154629.md), 2019-03-18, 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.

JSON: [/v1/bulletins/10155030](/v1/bulletins/10155030)

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