2003 GMC Sierra
The 2003 GMC Sierra is listed in 13 versions in the EPA fuel economy database, with 4.3 L 6-cyl, 4.8 L 8-cyl, 5.3 L 8-cyl and 6.0 L 8-cyl powertrains. Combined fuel economy ranges from 13 to 16 MPG (best: 14.7 L/100 km).
Model year2003
Versions13
ClassStandard Pickup Trucks 2WD, Standard Pickup Trucks 4WD
Drive4-Wheel or All-Wheel Drive, Rear-Wheel Drive
Engines, transmissions & fuel economy
| Version | Powertrain | Transmission | Drive | Fuel | MPG city / hwy / comb | L/100 km (comb) | CO2 g/mi | Class |
|---|---|---|---|---|---|---|---|---|
| Sierra 1500 2WD | 4.3 L 6-cyl | Automatic 4-spd | Rear-Wheel Drive | Regular | 14 / 19 / 16 | 14.7 | 555 | Standard Pickup Trucks 2WD |
| Sierra 1500 2WD | 4.3 L 6-cyl | Manual 5-spd | Rear-Wheel Drive | Regular | 14 / 19 / 16 | 14.7 | 555 | Standard Pickup Trucks 2WD |
| Sierra 1500 2WD | 4.8 L 8-cyl | Automatic 4-spd | Rear-Wheel Drive | Regular | 14 / 18 / 15 | 15.7 | 592 | Standard Pickup Trucks 2WD |
| Sierra 1500 2WD | 4.8 L 8-cyl | Manual 5-spd | Rear-Wheel Drive | Regular | 14 / 19 / 16 | 14.7 | 555 | Standard Pickup Trucks 2WD |
| Sierra 1500 2WD | 5.3 L 8-cyl | Automatic 4-spd | Rear-Wheel Drive | Regular | 13 / 17 / 15 | 15.7 | 592 | Standard Pickup Trucks 2WD |
| Sierra 1500 2WD | 5.3 L 8-cyl | Automatic 4-spd | Rear-Wheel Drive | Gasoline or E85 | 13 / 18 / 15 | 15.7 | 592 | Standard Pickup Trucks 2WD |
| Sierra 1500 4WD | 4.3 L 6-cyl | Automatic 4-spd | 4-Wheel or All-Wheel Drive | Regular | 13 / 17 / 15 | 15.7 | 592 | Standard Pickup Trucks 4WD |
| Sierra 1500 4WD | 4.3 L 6-cyl | Manual 5-spd | 4-Wheel or All-Wheel Drive | Regular | 13 / 17 / 14 | 16.8 | 635 | Standard Pickup Trucks 4WD |
| Sierra 1500 4WD | 4.8 L 8-cyl | Automatic 4-spd | 4-Wheel or All-Wheel Drive | Regular | 13 / 16 / 14 | 16.8 | 635 | Standard Pickup Trucks 4WD |
| Sierra 1500 4WD | 4.8 L 8-cyl | Manual 5-spd | 4-Wheel or All-Wheel Drive | Regular | 13 / 16 / 14 | 16.8 | 635 | Standard Pickup Trucks 4WD |
| Sierra 1500 4WD | 5.3 L 8-cyl | Automatic 4-spd | 4-Wheel or All-Wheel Drive | Regular | 13 / 16 / 14 | 16.8 | 635 | Standard Pickup Trucks 4WD |
| Sierra 1500 4WD | 5.3 L 8-cyl | Automatic 4-spd | 4-Wheel or All-Wheel Drive | Gasoline or E85 | 12 / 16 / 14 | 16.8 | 635 | Standard Pickup Trucks 4WD |
| Sierra Denali 1500 AWD | 6.0 L 8-cyl | Automatic 4-spd | 4-Wheel or All-Wheel Drive | Regular | 11 / 15 / 13 | 18.1 | 684 | Standard Pickup Trucks 4WD |
Figures are EPA estimates for the U.S. market (U.S. gallons). Your mileage will vary. Transmissions: (S6) = 6-speed with manual select mode, (AV) = continuously variable, (AM) = automated manual.
Safety recalls
Check the NHTSA recall database for the 2003 GMC Sierra.