Gas Mileage Summary
| City | 13 mpg (18.1 litres/100km) |
|---|---|
| Highway | 18 mpg (13.1 litres/100km) |
| Combined | 15 mpg (15.7 litres/100km) |
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Found 2 of 25217 records in table Fuel Economy Specs
Now Showing 1 of 2 
Current Record: 1999 GMC C2500 SIERRA 2WD #15668
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| Full_name | 1999 GMC C2500 SIERRA 2WD |
|---|---|
| Year | 1999 |
| Make | GMC |
| Model | C2500 SIERRA 2WD |
| Fuel system | Regular Gasoline |
| Engine Size | 323.426 cubic inches (5.3 litres) |
| Transmission | Lock-Up/Automatic/4-Speed |
| Drive | Rear wheel drive |
| Class | STANDARD PICKUP TRUCKS 2WD |
| Fuel type | Regular Gasoline |
| Cylinders | 8 |
| Mileage (city) | 15 mpg (15.7 litres/100km) |
| Mileage (hwy) | 19 mpg (12.4 litres/100km) |
| Mileage (combined) | 17 mpg (13.8 litres/100km) |
| Unadj city mpg | 16.9 |
| Unadj hwy mpg | 24.8 |
| Unadj combined mpg | 19.7279 |
| Average annual fuel | $1014 |