Anyone know where I can get a 'quality' made TPS? I've replaced three of them now because of internal plunger shaft problems (sticking, gritty, open) and getting bad or irregular voltages. Causes havoc when the computer thinks your right foot is somewhere when it's not... The last one I just took out is made by Federal, and the one in there now is from NAPA. I haven't checked with GM to see what they've got...