The GMC Sierra FX 4 × 4 truck
The Chevrolet Silverado and GMC Sierra trucks have been essentially the same for their entire history. The Silverado today is generally advertised as the “lower” version, while the Sierra has more luxury options. There are some trim and option variations as well. Early models included variations in the engine and equipment, but the present differences are slight. The 1999 redesign included different grilles and interior trim, and certain features (e.g. Quadrasteer) were included at different times on the two trucks.