2003 GMC Sierra service brakes, hydraulic problems
38 owner complaints filed with NHTSA name the service brakes, hydraulic on the 2003 GMC Sierra — 18% of all complaints for this model year.
What owners report
“Tl* the contact owns a 2003 gmc sierra. While driving approximately 30 mph, the brake pedal sank to the floorboard when it was depressed. The contact had to shift to a lower gear to slow down the vehicle and the brake service warning indicator illuminated. The contact discovered that the brake…”
filed Aug 12, 2014
“Truck was entering major highway,traffic begins too slow due to rush hour ,seeing this occur I stepped on brakes expecting to slow down ,until I realized pedal had gone all the way to floor,then I let up an pushed to floor again-no brakes no room to go left or right impact was unavoidable,impacted…”
filed Jul 17, 2012
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- CERTAIN SPORT UTILITY VEHICLES, PICKUP TRUCKS, AND PASSENGER VANS FAIL TO COMPLY WITH THE…Campaign 04V045000 · Feb 4, 2004
Related service bulletins
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.
PIT3665E · Service Bulletin/Repair Instructions · issued Jan 31, 2017
Service Brakes, Hydraulic problems in other Sierra years
| Year | Reports | Share |
|---|---|---|
| 2017 Sierra | 1 | 2% |
| 2015 Sierra | 1 | 2% |
| 2012 Sierra | 1 | 3% |
| 2011 Sierra | 1 | 2% |
| 2010 Sierra | 1 | 3% |
| 2009 Sierra | 1 | 3% |
| 2008 Sierra | 1 | 1% |
| 2007 Sierra | 2 | 3% |
| 2006 Sierra | 7 | 13% |
| 2005 Sierra | 10 | 9% |
| 2004 Sierra | 28 | 15% |
| 2002 Sierra | 93 | 37% |
Other reported problem areas on the 2003 GMC Sierra
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.