From 1998 -1999 GM completely redesigned the Silverado/Sierra, new everything, including drive terrian. But many of us were sad to see the 350 leave the line up. The 5.3L was the motor which replaced it. Was this the right move, in 1999 the 5.3L was claimed to have 270horsepower and 315 lb-fts of torque, and the old 5.7L had 255hp, and 325lb-fts of torque. Many people believed that the 5.7l was still more powerful, and that GM made a mistake replacing the 5.3L. So if you have had a 96-98 Silverado give your opinion on what engine had better overall performance.