# Service bulletin 18NA046

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: 10137330
- Published by NHTSA: 2018\-05\-21
- Manufacturer's number: 18NA046
- Manufacturer's date: 2018\-02\-15
- NHTSA component: EXTERIOR LIGHTING:HEADLIGHTS:CONCEALMENT DEVICES

## NHTSA's summary

This technical bulletin provides repair information to correct a customer concern of a headlamp bezel loose or falling off.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10137330-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10137330-0001.pdf)

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

## Components

Lighting, Headlights

## Vehicles listed

- 2016 to 2018 CHEVROLET SILVERADO 1500

## Other bulletins for the same vehicles and component

- [PIT5546G](/bulletins/10171311.md), 2020-02-10, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS; ELECTRICAL SYSTEM; EXTERIOR LIGHTING. This Preliminary information communicates that water leaking into the headlamp assembly or headlamp assembly connections can cause an electrical short which will keep modules from shutting down causing a dead battery and a no crank condition, a crank no start, or unable to program the engine control module. Engine control module will set a diagnostic trouble code of P1682, or the engine will continue to run with the ignition off.
- [PIT3219F](/bulletins/10161011.md), 2019-06-10, Service bulletin: ELECTRICAL SYSTEM; EXTERIOR LIGHTING:HEADLIGHTS. This Preliminary Information communicates to technicians that the Daytime Running Lamps \(DRL's\) or the auto headlamps will not shut off when using the daytime running lamp disable switch \(Which is part of the headlamp switch\), if the vehicles was built for Canada \(RPO Z49\). These vehicles were built with different software that doesn't allow the DRL's or Auto headlamp to be shut off. Canada law prohibits disabling daytime running lamps \(DRL's\) or auto headlamps.
- [PIT5412D](/bulletins/10161005.md), 2019-06-10, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. This Preliminary Information communication provides information to the technician about vehicles that have either the truck or the snowplow's headlights are flickering or inoperative. There may be a diagnostic trouble code B2575 and or a B2699 set in the body control module. Technician will need to contact the snowplow manufacturer for additional information on their headlight changeover system. Technician is to refer to the latest version of the General Motors up\-fitter integration bulletin 116 for additional information these circuits. Technician can find this information at http://www.gmupfitter.com/, under the "Technical Bulletin" Tab and then "Show all bulletins."
- [PIT3219E](/bulletins/10137526.md), 2018-05-21, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS:HIGH/LOW BEAM DIMMER SWITCH. This Preliminary Information communicates to techniciansthat the Daytime Running Lamps \(DRL\&\#39;s\) or the auto headlamps will not shut off when using the daytime running lamp disable switch \(Which is part of the headlamp switch\), if the vehicles was built for Canada \(RPO Z49\). These vehicles were built with different software that doesn\&\#39;t allow the DRL\&\#39;s or Auto headlamp to be shut off. Canada law prohibits disabling daytime running lamps \(DRL\&\#39;s\) or auto headlamps.
- [18NA001](/bulletins/10137274.md), 2018-05-21, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. This informational bulletin explains normal operation of HID bulbs when driving over road irregularities.
- [PIT5412C](/bulletins/10129077.md), 2018-02-21, Service bulletin: STRUCTURE; EXTERIOR LIGHTING:HEADLIGHTS; EXTERIOR LIGHTING:HEADLIGHTS:SWITCH. This Preliminary Information communication provides information to the technician about vehicles that have either the truck or the snowplow\&\#39;s headlights are flickering or inoperative. There may be a diagnostic trouble code B2575 and or a B2699 set in the body control module. Technician will need to contact the snowplow manufacturer for additional information on their headlight changeover system. Technician is to refer to the latest version of the General Motors up\-fitter integration bulletin 116 for additional information these circuits. Technician can find this information at http://www.gmupfitter.com/, under the "Technical Bulletin" Tab and then "Show all bulletins."
- [02\-08\-42\-001I](/bulletins/10116890.md), 2017-08-31, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS; EXTERIOR LIGHTING:BRAKE LIGHTS; EXTERIOR LIGHTING:BACK UP LIGHTS. This informational bulletin provides an out line on Headlamp, Tail Lamp, License Lamp or Fog/Driving Lamp Damage and what should be considered warranty replacement and not
- [01\-08\-42\-001K](/bulletins/10116874.md), 2017-08-31, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. This informational bulletin provides information on exterior lamp condinsation and replacement guidelines
- [PIT5412B](/bulletins/10113290.md), 2017-08-15, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. This Preliminary Information communication provides information to the technician about vehicles that have either the truck or the snowplow's headlights are flickering or inoperative. There may be a diagnostic trouble code B2575 and or a B2699 set in the body control module. Technician will need to contact the snowplow manufacturer for additional information on their headlight changeover system. Technician is to refer to the latest version of the General Motors up\-fitter integration bulletin 116 for additional information these circuits. Technician can find this information at http://www.gmupfitter.com/, under the "Technical Bulletin" Tab and then "Show all bulletins."
- [PIT5412A](/bulletins/10111693.md), 2017-08-15, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. This Preliminary Information communication provides information to the technician of the snow plow headlamps inoperative after switching from the factory headlamps to the snowplow headlamps. There may be a diagnostic trouble code B2575 and or a B2699 set in the body control module. Technician is to refer to the latest version of the General Motors up\-fitter integration bulletin 116 for additional information these circuits.

JSON: [/v1/bulletins/10137330](/v1/bulletins/10137330)

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