1977 GMC Sierra Statistics from North America
Warning, these statistics are based on a biased sample, so should be treated with caution
| Number of reviews | 4 |
| Would buy another GMC? | 75% |
| Would not buy another GMC? | 0% |
| Average Performance marks | 8.3 |
| Average Reliability marks | 9.3 |
| Average Comfort marks | 7.8 |
| Average Dealer Service marks | 0.0 |
| Average Running Costs (higher is cheaper) | 4.8 |