PIT3665G
Service Bulletin Details
Public Details for: PIT3665G
This preliminary information communication advises the technician that the hydro-boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its own at a full turn.
- 2019 - 2018 - 2017 - 2016 - 2015 - 2014 - 2013 - 2012 - 2011 - 2010 - 2009 - 2008 - 2007 - 2006 - 2005 - 2004 - 2003 - 2002 - 2001 - 2000 - 1999 - 1998 -
Models from 2019
| 2019 CHEVROLET EXPRESS |
| 2019 CHEVROLET SILVERADO 1500 |
| 2019 CHEVROLET SUBURBAN |
| 2019 GMC SAVANA |
| 2019 GMC SIERRA 1500 |
Models from 2018
| 2018 CHEVROLET EXPRESS |
| 2018 CHEVROLET SILVERADO 2500 |
| 2018 CHEVROLET SUBURBAN |
| 2018 GMC SAVANA |
| 2018 GMC SIERRA 3500 |
Models from 2017
| 2017 CHEVROLET EXPRESS |
| 2017 CHEVROLET SILVERADO |
| 2017 CHEVROLET SUBURBAN |
| 2017 GMC SAVANA |
| 2017 GMC SIERRA |
Models from 2016
| 2016 CHEVROLET EXPRESS |
| 2016 CHEVROLET SILVERADO 2500 |
| 2016 CHEVROLET SUBURBAN |
| 2016 GMC SAVANA |
| 2016 GMC SIERRA 1500 |
Models from 2015
| 2015 CHEVROLET EXPRESS |
| 2015 CHEVROLET SILVERADO 2500 |
| 2015 GMC SAVANA |
| 2015 GMC SIERRA 1500 |
Models from 2014
| 2014 CHEVROLET EXPRESS |
| 2014 CHEVROLET SILVERADO 1500 |
| 2014 GMC SAVANA |
| 2014 GMC SIERRA 1500 |
Models from 2013
| 2013 CHEVROLET EXPRESS |
| 2013 CHEVROLET SILVERADO 3500 |
| 2013 GMC SAVANA |
| 2013 GMC SIERRA 3500 |
Models from 2012
| 2012 CHEVROLET EXPRESS |
| 2012 CHEVROLET SILVERADO 2500 |
| 2012 GMC SAVANA |
| 2012 GMC SIERRA 2500 |
Models from 2011
| 2011 CHEVROLET EXPRESS |
| 2011 CHEVROLET SILVERADO 1500 |
| 2011 GMC SAVANA |
| 2011 GMC SIERRA 3500 |
Models from 2010
| 2010 CHEVROLET EXPRESS |
| 2010 CHEVROLET SILVERADO 1500 |
| 2010 GMC SAVANA |
| 2010 GMC SIERRA 1500 |
Models from 2009
| 2009 CHEVROLET EXPRESS |
| 2009 CHEVROLET SILVERADO 1500 |
| 2009 GMC SAVANA |
| 2009 GMC SIERRA 1500 |
Models from 2008
| 2008 CHEVROLET EXPRESS |
| 2008 CHEVROLET SILVERADO 1500 |
| 2008 GMC SAVANA |
| 2008 GMC SIERRA 1500 |
Models from 2007
| 2007 CHEVROLET EXPRESS |
| 2007 CHEVROLET SILVERADO 1500 |
| 2007 GMC SAVANA |
| 2007 GMC SIERRA 1500 |
| 2007 HUMMER H2 |
Models from 2006
| 2006 CHEVROLET EXPRESS |
| 2006 CHEVROLET SILVERADO 1500 |
| 2006 GMC SAVANA |
| 2006 GMC SIERRA 1500 |
| 2006 HUMMER H2 |
Models from 2005
| 2005 CHEVROLET ASTRO |
| 2005 CHEVROLET EXPRESS |
| 2005 CHEVROLET SILVERADO 1500 |
| 2005 GMC SAFARI |
| 2005 GMC SAVANA |
| 2005 GMC SIERRA 2500 |
| 2005 HUMMER H2 |
Models from 2004
Models from 2003
Models from 2002
Models from 2001
Models from 2000
| 2000 CHEVROLET ASTRO |
| 2000 CHEVROLET EXPRESS |
| 2000 CHEVROLET SILVERADO 1500 |
| 2000 GMC SAFARI |
| 2000 GMC SAVANA |
| 2000 GMC SIERRA 2500 |
Models from 1999
| 1999 CHEVROLET ASTRO |
| 1999 CHEVROLET EXPRESS |
| 1999 CHEVROLET SILVERADO 1500 |
| 1999 GMC SAFARI |
| 1999 GMC SAVANA |
| 1999 GMC SIERRA 3500 |
Models from 1998
| 1998 CHEVROLET ASTRO |
| 1998 CHEVROLET EXPRESS |
| 1998 CHEVROLET SILVERADO 1500 |
| 1998 GMC SAFARI |
| 1998 GMC SAVANA |
| 1998 GMC SIERRA 1500 |
Bulletin No.: PIT3665G Published date: 05/13/2019 Preliminary Information PIT3665G Brake Pedal Moves or Self Applies at Full Turns Models Brand: Model: VIN: Model Years: from Engine: to Transmissions: Cadillac Escalade 2001 - 2004 All All All All Chevrolet Avalanche 2002 - 2004 All All All All Chevrolet Tahoe 2001 - 2004 All All All All Chevrolet Suburban 2001 - 2004 All All All All Chevrolet Suburban 3500HD 2016 - 2019 All All All All Chevrolet Express 1998 - 2019 All All All All Chevrolet Silverado 1998 - 2019 All All All All Chevrolet Astro Vans 1998 - 2005 All All All All GMC Savana 1998 - 2019 All All All All GMC Sierra 1998 - 2019 All All All All GMC Yukon 2001 - 2004 All All All All GMC Safari 1998 - 2005 All All All All Hummer H2 2003 - 2007 All All All All With Hydro-Boost Brake System Supersession Statement: This PI was superseded to add the 2019 Models. Please discard PIT3665F. Condition / Concern On vehicles with a Hydro-Boost System, customers may notice during full lock turns or near full lock turns that the brake pedal will move down or self apply. This can be caused by the internal dump valve of the hydro-boost not seating properly due to contamination in the steering system. The hydroboost assembly is not tolerant to certain types of contaminates that may be present in the steering system. Recommendations / Instructions The Hydro-Boost System is not serviceable and must be replaced. IMPORTANT: Before replacement of the Hydro-Boost System, the entire steering system (including power steering pump, lines, cooler, and gear box) must be flushed to avoid reoccurrence. Warranty Information For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Labor Operation Description Labor Time 2441730 Power Brake Booster Replacement Use Published Labor Operation Time Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. © 2019 General Motors. All Rights Reserved.