there are many
pretty much any obd2 scanner will scan
a couple popular ones would be autotap ,Ls1m , scanmaster, or aeroforce guage , LS1m is no longer so you would be looking for used
if you plan on modding start out with a scanner/ tuner like HP Tuners
by the time you buy a scanner and a mail order tuned pcm with core charge you will be close to spending tuner money anyways and by the time you really need the tuner capability you will be very familiar with using the scanner and its histogram features and will be way ahead of the game