2001 Chevrolet Silverado 1500 4dr Extended Cab LS 4WD LB (4.8L 8cyl 4A)
This truck would shift with a series of distinct bumps, as many as three, on the automatic shift from 1st to 2nd gear.
The dealer could not fix the problem so I went through the Florida Lemon Law process.
The final arbitration decision was that the shifting problem had no "significant safety of monetary impact on the vehicle" therefore my request for replacement was "DENIED". Chevy, with the Arbitrators concurance, said that the bumping shift was a normal feature for this vehicle.