1986 GMC Suburban
8 configurations — EPA fuel economy ratings
| Trim / Variant | City MPG | Hwy MPG | Combined MPG | Fuel | Drive | Engine | Transmission |
|---|---|---|---|---|---|---|---|
| C15 Suburban 2WD | 12 | 16 | 14 | Regular Gasoline | Rear-Wheel Drive | 5L 8-cyl | Automatic 4-spd |
| C15 Suburban 2WD | 11 | 15 | 13 | Regular Gasoline | Rear-Wheel Drive | 5.7L 8-cyl | Automatic 4-spd |
| C15 Suburban 2WD | 11 | 16 | 13 | Regular Gasoline | Rear-Wheel Drive | 5.7L 8-cyl | Automatic 4-spd |
| C15 Suburban 2WD | 16 | 22 | 18 | Diesel | Rear-Wheel Drive | 6.2L 8-cyl | Automatic 4-spd |
| K15 Suburban 4WD | 11 | 15 | 12 | Regular Gasoline | 4-Wheel or All-Wheel Drive | 5.7L 8-cyl | Automatic 4-spd |
| K15 Suburban 4WD | 10 | 15 | 12 | Regular Gasoline | 4-Wheel or All-Wheel Drive | 5.7L 8-cyl | Automatic 4-spd |
| K15 Suburban 4WD | 10 | 12 | 11 | Regular Gasoline | 4-Wheel or All-Wheel Drive | 5.7L 8-cyl | Manual 4-spd |
| K15 Suburban 4WD | 15 | 20 | 16 | Diesel | 4-Wheel or All-Wheel Drive | 6.2L 8-cyl | Automatic 4-spd |