AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2011 Gmc Sierra Denali
Overall rating NHTSA-grounded
Below average
Estimated 5-year repair + maintenance cost: $15,000–$25,000
The 2011 GMC Sierra Denali has numerous complaints, notably with air bags and structural issues. While it has minimal recall activity, the frequency of complaints suggests potential reliability concerns.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| air bags | 70,000–100,000 miles | $500–$1,500 | common |
| structure | 80,000–120,000 miles | $800–$2,000 | common |
| power train | 90,000–130,000 miles | $1,000–$3,000 | occasional |
| suspension | 60,000–100,000 miles | $400–$1,200 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil and filter changes
- Tire rotation
- Brake fluid replacement
- Transmission fluid change
- Coolant flush
- Spark plug replacement
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Airbag warning light
- Unusual cabin noises
- Transmission slipping
- Uneven tire wear
Generated by gpt-4o on 8/24/2026. Cost ranges are conservative estimates that account for typical regional variation.