1999 GMC Sierra 2500 service brakes, hydraulic problems
13 owner complaints filed with NHTSA name the service brakes, hydraulic on the 1999 GMC Sierra 2500 — 36% of all complaints for this model year.
What owners report
“Tl* the contact owns a 1999 gmc c2500 pickup. The contact stated that while traveling downhill, the brakes were applied but the vehicle did not respond. The contact had to use the emergency break in order to stop the vehicle. The vehicle was inspected and it was determined that the brakes lines…”
filed Apr 24, 2013
“1999 gmc sierra k2500 4x4. At just over 100k miles the advanced rust and corrosion on my steel brake lines is very bad. These are the hard galvanized lines that are in the engine compartment beneath the brake fluid reservoir near the frame, and the hard galvanized lines that run along the inside of…”
filed May 29, 2011
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% |
| 2004 Sierra 2500 | 22 | 15% |
| 2003 Sierra 2500 | 43 | 27% |
| 2002 Sierra 2500 | 44 | 33% |
| 2001 Sierra 2500 | 44 | 33% |
| 2000 Sierra 2500 | 23 | 48% |
Other reported problem areas on the 1999 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.