AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2009 Gmc Sierra Denali
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $5,000–$10,000
The 2009 GMC Sierra Denali shows an average reliability with notable issues in multiple areas such as airbags and structure, though no recalls intensify concerns.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| airbags | 40,000–70,000 miles | $500–$1,000 | common |
| structure | 50,000–80,000 miles | $300–$900 | common |
| fuel system | 60,000–90,000 miles | $400–$800 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil change every 7,500 miles
- Transmission fluid every 60,000 miles
- Brake fluid every 45,000 miles
- Coolant every 100,000 miles
- Replace air filter annually
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Airbag warning light
- Odd cabin noises
- Fuel smell
- Squeaky suspension
- Hard or slow starting
Generated by gpt-4o on 8/24/2026. Cost ranges are conservative estimates that account for typical regional variation.