For 1990, Chevrolet and GMC pickup trucks underwent a minor exterior revision, with upper trims (Chevrolet Scottsdale/Silverado, and GMC SLX/SLE) replacing four sealed-beam headlamps with white-lens composite headlamps; base trims (Cheyenne and GMC SL) continued the use of two sealed-beam headlamps. Two new versions (exclusive to Chevrolet) were introduced: the W/T 1500 and the 454SS. The W/T 1500 (W/T= Work Truck) was a de-contented version of the Cheyenne marketed primarily for work use; the 454SS combined elements of the Sport appearance package and the Silverado with the 7.4 L V8 of 3500-series trucks.
