2004 GMC Sierra 2500 service brakes, hydraulic problems
22 owner complaints filed with NHTSA name the service brakes, hydraulic on the 2004 GMC Sierra 2500 — 15% of all complaints for this model year.
What owners report
“The complaint is that the brake lines failed and are made of very poor material. The brake line failed on my way to work one day on march 10,2015.”
filed Jul 9, 2015
“Both front hydraulic brake lines corroded on drivers side, with loss of braking, on chassis top rear of front wheel. It appears that there is a large wiring loom (1 1/2" o.d.) clipped on top of hydraulic lines, one to lf and rf wheels. Corrosion on both lines are at the contact of the loom and…”
filed Apr 5, 2012
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Service Brakes, Hydraulic problems in other Sierra 2500 years
| Year | Reports | Share |
|---|---|---|
| 2025 Sierra 2500 | 1 | 4% |
| 2024 Sierra 2500 | 1 | 1% |
| 2009 Sierra 2500 | 2 | 6% |
| 2007 Sierra 2500 | 4 | 5% |
| 2006 Sierra 2500 | 6 | 9% |
| 2005 Sierra 2500 | 19 | 17% |
| 2003 Sierra 2500 | 43 | 27% |
| 2002 Sierra 2500 | 44 | 33% |
| 2001 Sierra 2500 | 44 | 33% |
| 2000 Sierra 2500 | 23 | 48% |
| 1999 Sierra 2500 | 13 | 36% |
Other reported problem areas on the 2004 GMC Sierra 2500
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.