# Service bulletin N192266750\-01

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: 10171240
- Published by NHTSA: 2020\-02\-10
- Manufacturer's number: N192266750\-01
- Manufacturer's date: 2019\-12\-02
- NHTSA component: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING

## NHTSA's summary

N192266750\-01 \- Service Update \(Revised Warranty Information and Service Procedure\). On certain vehicles that are equipped with a 6.6L diesel engine, may have one or more of the following conditions exist: 1.The instrument panel cluster may incorrectly display the message ?DEF Low? when a diesel engine fluid \(DEF\) controller internal fault is detected \(DTC P20FF\), instead of displaying the proper ?Service DEF System? message. 2.The customer may complain of excessive engine fan noise at a low vehicle speed. 3.Under certain conditions, the diagnostic system may set one of the following DTC?s when there is no problem with a component: \(P20EE, P226D, P16F3 and P129F\). Dealers are to reprogram the engine control module.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10171240-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10171240-9999.pdf)

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

## Components

Electrical system, Engine, Instrument cluster

## Trouble codes named

P129F, P16F3, P20EE, P20FF, P226D

## Vehicles listed

- 2020 CHEVROLET SILVERADO 4500
- 2020 GMC SIERRA 2500

## Other bulletins for the same vehicles and component

- [07\-08\-49\-020R](/bulletins/10244214.md), 2023-10-18, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT; ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER. This informational bulletin provides information for the IPC odometer programming method quick reference guide.
- [PIT5195G](/bulletins/10213796.md), 2022-06-13, Service bulletin: ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER. This Preliminary Information communication provides information to the technician about vehicles that the speedometer needle appears to be inaccurate. Dealer should advise the customer the specification for speedometer needle accuracy is \+/\- 2 MPH at any given speed when looking straight at the needle.
- [21NA247](/bulletins/10205569.md), 2021-12-27, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE:FUEL LEVEL FLOAT/SENSOR/SENDING UNIT. This technical bulletin provides a procedure This technical bulletin provides repair information to correct a customer concern of Unable to Set PIN to Enable Teen Driver Feature.
- [PIE0645](/bulletins/10200174.md), 2021-08-09, Service bulletin: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT; POWER TRAIN. This engineering information \(EI\) is requesting information from technicians to perform the check list provided and contact the engineer listed in regards to Service Engine Soon Lamp Illuminated on Driver Information Center \(DIC\), Transmission Not Shifting Properly and/or Slipping, DTC P0796, P2714 Set.
- [PIE0642A](/bulletins/10200170.md), 2021-08-09, Service bulletin: EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engineer listed in regards the Service Engine Soon \(SES\) lamp illuminated and/or Service Emission System Message on the Driver Information Center \(DIC\).
- [20NA212](/bulletins/10187412.md), 2021-02-22, Service bulletin: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. This technical bulletin provides repair information to correct a customer concern of IPC Gauges Inoperative or Fluctuate, No Crank, Start then Stall.
- [PIT5387J](/bulletins/10187175.md), 2021-02-16, Service bulletin: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; BACK OVER PREVENTION:SOFTWARE; BACK OVER PREVENTION:DISPLAY FUNCTION. This Preliminary Information communication provides information to the technician how to repair vehicles that Instrument Panel Cluster, Radio, and Heater\-Vent\-Air Conditioning display blanks out, Bluetooth phone or Pandora connection dropped, the radio station or volume changes when operating the snow plow. Please advise the customer that engineering is aware of this concern and working on this issue.
- [PIT5387J](/bulletins/10185724.md), 2021-01-25, Service bulletin: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT:APPLIANCE:ELECTRIC WATER HEATER. This Preliminary Information communication provides information to the technician how to repair vehicles that Instrument Panel Cluster, Radio, and Heater\-Vent\-Air Conditioning display blanks out, Bluetooth phone or Pandora connection dropped, the radio station or volume changes when operating the snow plow. Please advise the customer that engineering is aware of this concern and working on this issue.
- [060089029T](/bulletins/10176647.md), 2020-06-22, Service bulletin: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT. This informational bulletin includes information on Interior Cleaning \- Instrument Panel \(IP\), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer \- Product Availability.
- [060089029S](/bulletins/10176646.md), 2020-06-22, Service bulletin: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; EQUIPMENT. This informational bulletin includes information on Interior Cleaning \- Instrument Panel \(IP\), Hard or Plastic Surfaces, Seats, Carpet, Leather, Vinyl, Fabric Cleaner, Stain Remover, Restorer \- Product Availability.

JSON: [/v1/bulletins/10171240](/v1/bulletins/10171240)

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