# Service bulletin G\-176944

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: 10114218
- Published by NHTSA: 2017\-08\-15
- Manufacturer's number: G\-176944
- Manufacturer's date: 2013\-10\-11
- NHTSA component: ELECTRICAL SYSTEM:SOFTWARE

## NHTSA's summary

13330 \- Service Update. This bulletin provides a service procedure to address incorrect calibration values in the Active Fuel Management \(AFM\) system. These calibration errors can cause the hydraulic lifters to actuate at the wrong time, when the combustion chamber is under high pressure. If this occurs the hydraulic lifter can be damaged and the affected cylinder will no longer operate. To correct this condition, dealers will reprogram these vehicles with a new ECM and TCM calibration.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2013/MC-10114218-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2013/MC-10114218-0001.pdf)

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

## Components

Electrical system, Software

## Vehicles listed

- 2014 CHEVROLET SILVERADO 1500
- 2014 GMC SIERRA 1500

## Recalls for the same vehicles and component

- [14V301000](/recalls/nhtsa/14V301000.md), 2014-06-06: ELECTRICAL SYSTEM:SOFTWARE; SEAT BELTS:FRONT:WARNING LIGHT/DEVICES

## Other bulletins for the same vehicles and component

- [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.
- [PIT5350](/bulletins/10252160.md), 2024-04-01, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. Programming IPC Engine Hours Into A Replacement IPC.
- [130089004H](/bulletins/10246623.md), 2023-12-11, Service bulletin: VISIBILITY:WINDSHIELD; UNKNOWN OR OTHER; ELECTRICAL SYSTEM:SOFTWARE; EXTERIOR LIGHTING:LIGHTING CONTROL MODULE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; VEHICLE SPEED CONTROL:THROTTLE:THROTTLE POSITION SENSOR \(TPS\). Car and Truck Fix it Right the First Time Issues
- [130089003](/bulletins/10246614.md), 2023-12-11, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. Vehicle Software Enhancements
- [PIP5632G](/bulletins/10230683.md), 2023-01-30, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
- [PIP4902Q](/bulletins/10230682.md), 2023-01-30, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.
- [21NA010](/bulletins/10187773.md), 2021-03-01, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\); ELECTRICAL SYSTEM:SOFTWARE. This technical bulletin provides a procedure to reset the DTCs and take the vehicle for a test drive to verify the codes do not return.
- [150844001J](/bulletins/10166666.md), 2019-10-28, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. This informational bulletin provides information for the GM of Canada OnStar Cellular Communication Upgrade to 3G/4G LTE for vehicles that may need an upgrade.
- [PIP5369C](/bulletins/10160646.md), 2019-06-03, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM:SOFTWARE. This Preliminary Information communication provides information to the technician about vehicles that have "Service 4 Wheel Drive" message on the Driver Information Center. Provides the technician with additional information to ensure that the TCCM contains the latest software released to address previous issues, also advises of default action changes. Calls out specific circuits to be inspected to help isolate intermittent codes.
- [070849020P](/bulletins/10158861.md), 2019-04-22, Service bulletin: EQUIPMENT:ELECTRICAL; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. This informational bulletin provides information for the IPC odometer programming method quick reference guide.

JSON: [/v1/bulletins/10114218](/v1/bulletins/10114218)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20G-176944&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10114218&vehicle=Service%20bulletin%20G-176944)