I have a 2007 matrix . the drivers seat keeps lowering on its own. i crank it up 8 cranks. after 2 days of driving, it lowers 2 cranks. if i let it go, it will lower all the way down. the dealer replaced the seat lifter but that didn't help. the seat is lowering because the crank(lever) that raises and lowers the seat rubs against the seat cushion. after a short while (1 or 2 days of driving) it lowers because my weight on the cushion pushes the crank(lever) down. i am 195lbs. the dealer said there is nothing they can do. i have to place a wooden dowel under the crank(lever) to keep it from lowering. *tr