1991 GMC Suburban
4 configurations — EPA fuel economy ratings
| Trim / Variant | City MPG | Hwy MPG | Combined MPG | Fuel | Drive | Engine | Transmission |
|---|---|---|---|---|---|---|---|
| R1500 Suburban 2WD | 11 | 16 | 13 | Regular Gasoline | Rear-Wheel Drive | 5.7L 8-cyl | Automatic 4-spd |
| R1500 Suburban 2WD | 15 | 20 | 17 | Diesel | Rear-Wheel Drive | 6.2L 8-cyl | Automatic 4-spd |
| Suburban V1500 4WD | 11 | 15 | 12 | Regular Gasoline | 4-Wheel or All-Wheel Drive | 5.7L 8-cyl | Automatic 4-spd |
| Suburban V1500 4WD | 14 | 20 | 16 | Diesel | 4-Wheel or All-Wheel Drive | 6.2L 8-cyl | Automatic 4-spd |