Miss on 99 K2500 with 5.7L

I have a 1999 OBS burb with 131K miles on it. I have a miss between 1500 - 2200 rpms. There is no code or SES light. I put it on a scanner and it does not show a miss. It is not in the trans, as I can get it to miss while in park and rev up to 2500.
I have replaced the following:
tune-up (plugs/wire/cap/rotor, bosch wire, autolite plugs)
coil (2 different brands, accel & advanced auto's)
fuel filter (fram)
fuel pump (http://www.2carpros.com/forum/miss-on-99-burb-k2500-with-57l-vt50572.html#) (ac delco)
O2 sensor (bosch)
TPS sensor (advance auto's)
seafoam in gas tank to clean injectors
and swapped from the old poppet valve spider to the ungraded injector spider

Still can't find miss.
Any help?

Basically stock, has flowmaster cat-back, K&n filter, and a PCM4less computer. I have even put the stock computer back in. Same problem.
Motor still pulls strong to 5K rpm. If I am under light throttle and light load, that is when the miss occurs. If I give it more gas, it seems to go away.

I chased this same thing on my '99 K2500 5.7 Burb - Have you found it yet? - mine was a worn out dist drive gear - pull your dist cap and if you can move the rotor more than a .100 you need a gear ~ 25 from the stealer...

Best of Luck

Chuck the Autolite plugs and put in AC Delco plugs.Ditch the Bosch wires also,All Bosch makes is junk and I know someone that has bad luck with anything made by Bosch,My father.

Ditto on the plugs and wires. On a GM vehicle Delco parts are the way to go for your ignition system.