General Motors led Detroit's Big Three in April as incentives and healthy truck volume boosted sales to 422,089 vehicles, up 12.7 percent compared with April 2001. GM truck sales were up 24 percent at 230,913 but car sales rose only 1.3 percent to 191,176 though the company said fleet volumes began to stabilise and retail sales regained momentum. Year to date, GM total vehicles sales were 0.2 percent down at 1,552,244 with cars down 15.8 percent to 661,000. That was offset by truck sales up 15.7 percent to 891,244. "Once again the industry's strength surprised us in April," GM's group vice president of sales, service and marketing Bill Lovejoy said in a statement.