# Service bulletin 19NA263

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: 10169346
- Published by NHTSA: 2019\-12\-16
- Manufacturer's number: 19NA263
- Manufacturer's date: 2019\-11\-20
- NHTSA component: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

## NHTSA's summary

This informational bulletin explains a normal condition for sludge to form in the oil cap when equipped with DEF system.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10169346-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10169346-9999.pdf)

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

## Components

Equipment and accessories, Labels and manuals

## Vehicles listed

- 2020 CHEVROLET SILVERADO 1500
- 2020 GMC SIERRA 1500

## Recalls for the same vehicles and component

- [2022160](/recalls/tc/2022160.md), 2022-03-31: Accessories
- [2020165](/recalls/tc/2020165.md), 2020-04-16: Accessories
- [2019494](/recalls/tc/2019494.md), 2019-10-03: Accessories

## Other bulletins for the same vehicles and component

- [23\-NA\-064](/bulletins/10254014.md), 2024-05-02, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT. This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during transit and or long period of stand time at the dealerships.
- [21\-NA\-155](/bulletins/10253528.md), 2024-04-23, Service bulletin: ELECTRICAL SYSTEM; SERVICE BRAKES, HYDRAULIC; EQUIPMENT. This informational bulletin advises the technician to check for faults that may be caused by the trailer otherwise found by a possible faulty trailer connector.
- [20\-NA\-132](/bulletins/10253527.md), 2024-04-23, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
- [17\-NA\-052](/bulletins/10253526.md), 2024-04-23, Service bulletin: WHEELS; EQUIPMENT. This bulletin updates the position of General Motors on refinishing aluminum wheels. GM has determined that wheel refinishing under warranty will no longer be performed.
- [PIC6486E](/bulletins/10253104.md), 2024-04-15, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary information communicates to dealer that GM is aware of the issue and is working on a resolution.
- [PIT5918A](/bulletins/10253067.md), 2024-04-15, Service bulletin: EQUIPMENT:ELECTRICAL. This Preliminary information communicates an issue where GM Accessory Illuminated Emblem may cause an issue with the left headlight/turn signal and dealership are to disable the Accessory Illuminated Emblem until a fix is available.
- [PIT5448J](/bulletins/10253060.md), 2024-04-15, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary Information communication advises the technician with a tip when the vehicle stops running after it has been idling for 2.5 hours. This is normal operation of the vehicle built with regular production code BTM and without Regular Production Option Code AVF. If the vehicle was built with regular production code BTM and AVF only has a 1 hour idle time.
- [23\-NA\-112](/bulletins/10252789.md), 2024-04-05, Service bulletin: STRUCTURE:BODY:TAILGATE:HINGE AND ATTACHMENTS; ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL; STRUCTURE. This technical bulletin provides a procedure to correct the condition of Inadvertent/Unwanted Tail Gate Opening.
- [20\-NA\-132](/bulletins/10252774.md), 2024-04-05, Service bulletin: ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EQUIPMENT. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
- [23\-NA\-103](/bulletins/10252126.md), 2024-03-29, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This service bulletin provides information on submitting quality Photos of Various Vehicle Concerns to the GM Technical Assistance Center \(TAC\).

JSON: [/v1/bulletins/10169346](/v1/bulletins/10169346)

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