# Service bulletin 17NA396

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: 10139235
- Published by NHTSA: 2018\-06\-04
- Manufacturer's number: 17NA396
- Manufacturer's date: 2017\-12\-11
- NHTSA component: HYBRID PROPULSION SYSTEM

## NHTSA's summary

This technical bulletin provides a procedure to diagnose and repair possible valve body issue or software issue.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10139235-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10139235-0001.pdf)

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

## Components

Hybrid and electric drive

## Vehicles listed

- 2017 CHEVROLET SILVERADO
- 2016 CHEVROLET SILVERADO 2500
- 2018 CHEVROLET SILVERADO 2500
- 2017 GMC SIERRA
- 2016 GMC SIERRA 2500
- 2018 GMC SIERRA 2500
- 2016 GMC SIERRA DENALI
- 2018 GMC SIERRA DENALI

## Other bulletins for the same vehicles and component

- [N212346580\-01](/bulletins/10209106.md), 2022-03-16, Service bulletin: EQUIPMENT:ELECTRICAL:ENGINE BLOCK HEATER; ELECTRICAL SYSTEM:PROPULSION SYSTEM; ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL. Customer Satisfaction Program \- certain vehicles equipped with the Duramax diesel 6.6 liter engine and the optional engine\-block heater cord, may have a condition in which the block heater cable function was disabled. Dealers will replace the engine block heater and cord.
- [PIT5513J](/bulletins/10154316.md), 2019-03-11, Service bulletin: HYBRID PROPULSION SYSTEM. This Preliminary Information communication advises the technician that the Technical Assistance Center TAC has a part restriction that has ended for the hybrid/EV battery Pack, Hybrid/EV Powertrain Control Module \(HPCM2\), High Voltage Battery Interface Control Module 1 and 2, Drive Motor Generator Battery Cooling Blower .

JSON: [/v1/bulletins/10139235](/v1/bulletins/10139235)

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