AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2011 Gmc Denali
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $6,000–$10,000
The 2011 GMC Denali has average reliability with some concerns in airbags but relatively few recalls. Owners report occasional issues which can affect long-term reliability.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| airbags | 60,000–100,000 miles | $500–$1,500 | common |
| transmission | 90,000–120,000 miles | $850–$2,500 | occasional |
| brake system | 80,000–110,000 miles | $300–$800 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- Oil change every 5,000 miles
- Brake fluid replacement bi-annually
- Transmission service every 50,000 miles
- Coolant flush every 50,000 miles
- Air filter replacement annually
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- Airbag warning light
- Transmission slipping or unusual shifts
- Braking system noises
- Unusual engine noises
Generated by gpt-4o on 8/24/2026. Cost ranges are conservative estimates that account for typical regional variation.