Another intermittent problem

I have a 02 Trailblazer with 59,000 mi. When I come to a stop, sometimes it stalls. It starts right back up with no problems and then runs fine. Also every now and then it will take off sluggish and act like it wants to stall but when I put my foot in it, it straightens right out. Any Ideas or similar problems? TIA, -Don

I had the same issue on the start, not the stop (if that makes sense)

Reflashed computer... seemed to solve the problem.

At the risk of sounding stupid... how do I reflash the computer? Thanks again, -Don