1999 GMC Sierra problems by component
600 owner complaints filed with NHTSA for the 1999 GMC Sierra, grouped by the component owners reported. Each component links to a detailed breakdown with mileage, severity and owner reports.
| Component | Complaints | Share | Median mileage |
|---|---|---|---|
| Service Brakes, Hydraulic → | 280 | 47% | 59,000 mi |
| Suspension → | 39 | 7% | — |
| Vehicle Speed Control → | 39 | 7% | — |
| Power Train → | 37 | 6% | — |
| Tires → | 31 | 5% | — |
| Structure → | 30 | 5% | 79,500 mi |
| Service Brakes, Air → | 26 | 4% | 50,870 mi |
| Service Brakes → | 25 | 4% | 150,145 mi |
| Seats → | 23 | 4% | 68,351 mi |
| Fuel System, Gasoline → | 18 | 3% | 60,200 mi |
| Steering → | 18 | 3% | — |
| Visibility → | 18 | 3% | — |
| Engine and Engine Cooling → | 17 | 3% | — |
| Seat Belts → | 15 | 3% | — |
| Air Bags → | 12 | 2% | — |
| Electrical System → | 12 | 2% | — |
| Parking Brake → | 10 | 2% | — |
| Exterior Lighting | 8 | 1% | — |
| Wheels | 8 | 1% | — |
| Fuel System, Other | 6 | 1% | — |
| Equipment | 4 | 1% | — |
| Latches/locks/linkages | 3 | 1% | — |
| Fuel/propulsion System | 2 | 0% | — |
| Equipment Adaptive/mobility | 1 | 0% | — |
| Interior Lighting | 1 | 0% | — |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.