My 2000 tahoe has an issue. There is something going on with my brakes. When I apply the brakes, it takes an extraordinary amount of pressure to apply the brakes and there is a noise like air leaking from somewhere. My second problem is that the truck has trouble going from stop. When I put my foot on the accelerator, it doesn't start moving immediately, instead, it almost stalls out until I apply more pressure, and then it jumps forward. Both of these problems started about three weeks after I had my brakes completely redone, with a new master cylinder.