Chevrolet: 97 gmc sierra, throttle position sensor, gmc sierra

Question
my truck keeps stalling after i put it in gear and when im riding down the road. it will idle ok, but once i put it in gear it just cuts off. while driving it will cut off and cut right back on. i replaced the fuel filter thinking that might be it, but it didn't fix it. any answers

Answer
Travis,
      Probably the first thing I would look at is the throttle position sensor. I would have the codes read and see if there is any stored in the computer, and if there is, it will give you a good place to start, but if not, I would look to the TPS.