AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2002 Gmc Sierra Denali
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $4,500–$7,500
The 2002 GMC Sierra Denali has an average reliability rating mainly due to recurring issues with the service brakes and hydraulic system. With a substantial number of complaints in these areas, owners should be mindful of potential repairs.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| service brakes | 80,000–120,000 miles | $300–$600 | very common |
| hydraulic system | 70,000–110,000 miles | $400–$900 | common |
| steering system | 90,000–130,000 miles | $350–$750 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil and filter changes
- Brake pad and rotor replacement
- Transmission fluid replacement
- Coolant system flush
- Suspension check and alignment
- Tire rotation and balancing
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Brake fluid leaks
- Unresponsive braking
- Hydraulic system noises
- Steering wheel vibrations
Generated by gpt-4o on 8/19/2026. Cost ranges are conservative estimates that account for typical regional variation.