# Service bulletin PIT4979C

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: 10112597
- Published by NHTSA: 2017\-08\-15
- Manufacturer's number: PIT4979C
- Manufacturer's date: 2012\-11\-21
- NHTSA component: FUEL SYSTEM, OTHER:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS; FUEL SYSTEM, GASOLINE

## NHTSA's summary

This Preliminary Information communication provides information to the technician about vehicles that have a buzz or rattle type noise during light acceleration around 1200\-2000 Revolutions per minute. Technician will need to reposition the fuel line and bracket down away from the floor pan.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2012/MC-10112597-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2012/MC-10112597-0001.pdf)

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

## Components

Fuel system, Fuel hoses and lines

## Vehicles listed

- 2007 to 2013 CADILLAC ESCALADE
- 2007 to 2013 CADILLAC ESCALADE ESV
- 2007 to 2013 CADILLAC ESCALADE EXT
- 2007 to 2013 CHEVROLET AVALANCHE
- 2007 to 2013 CHEVROLET SILVERADO
- 2007 to 2013 CHEVROLET SUBURBAN
- 2007 to 2013 CHEVROLET TAHOE
- 2007 to 2013 GMC SIERRA
- 2007 to 2013 GMC SIERRA DENALI
- 2007 to 2013 GMC YUKON
- 2007 to 2013 GMC YUKON DENALI
- 2007 to 2013 GMC YUKON DENALI XL
- 2007 to 2011 GMC YUKON XL
- 2012 to 2013 GMC YUKON XL

## Other bulletins for the same vehicles and component

- [PIP5596](/bulletins/10147348.md), 2018-11-13, Service bulletin: FUEL SYSTEM, GASOLINE; FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS; FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP. This Preliminary information communicates that when removing the fuel line jumper hose care should be taken to be sure the line is reinstalled correctly to avoid a no/low fuel pressure situation.
- [PIP3343F](/bulletins/10129057.md), 2018-02-21, Service bulletin: COMMUNICATION; FUEL SYSTEM, OTHER:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS. This Preliminary Information communication provides information to the technician about vehicles that have an oil leak shortly after a cold start when extremely low ambient temperatures are present. Technician will need to clean the area of the oil leak, clean and dry the PCV hoses, and replace the oil fill cap with part number 12589430.
- [PIP3343E](/bulletins/10111783.md), 2017-08-15, Service bulletin: FUEL SYSTEM, OTHER:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS. This Preliminary Information communication provides information to the technician about vehicles that have an oil leak shortly after a cold start when extremely low ambient temperatures are present. Technician will need to clean the area of the oil leak, clean and dry the PCV hoses, and replace the oil fill cap with part number 12589430.
- [PIP\-4942\-B](/bulletins/10056258.md), 2014-10-16, Service bulletin: FUEL SYSTEM, OTHER:DELIVERY:FUEL PUMP; FUEL SYSTEM, OTHER:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL. GMC/CHEVROLET: AT BOTTOM OF FLYWHEEL HOUSING, A LEAK IS FOUND, CAUSING A FUEL ODOR, DUE TO HIGH PRESSURE PUMP TO HIGH PRESSURE LINE FITTING OR FUEL RAIL CONNECTION. 2010\-2015 EXPRESS, SIERRA, SAVANA, SILVERADO. \*PE
- [PIP\-4942](/bulletins/10041435.md), 2011-10-03, Service bulletin: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP; FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS. CHEVROLET/GMC: AT HIGH PRESSURE PUMP TO HIGH PRESSURE FUEL LINES THERE ARE SIGNS OF FUEL LEAKAGE AND/OR FUEL ODOR. \*PE UPDATED ON 5/2/2012. \*KB

JSON: [/v1/bulletins/10112597](/v1/bulletins/10112597)

[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%20PIT4979C&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10112597&vehicle=Service%20bulletin%20PIT4979C)