hesitate/stumble

[sglfladad]

I'm going to do my best to describe a problem (I think) I'm having.
01 ZO6 - stock 80k miles.
Generally runs fine and fast. Once in a while only when wot from stop in 1st gear, as I get close to shifting into 2nd, engine bogs down and I feel something like a stumble or hesitation. Symptom continues for a little bit, even into 2nd. Continues even after letting up on the throttle..for just little bit, then all seems to go back to normal. Sometimes it has happened when wot from rolling start in 2nd and into 3rd.

Now, I read somewhere there's a rev limiter ...could this be kicking in and it takes the computer just a little bit to settle down again? Once I was watching the tach when it happened and I don't remember seeing it go past redline..but alot was going on and I'm not absolutely positive.

It feels similar to a feeling I had on another car when there was some gunk in the fuel filter and when fuel being sucked in it would clog, then unclog when backing off.

No codes in the DIC..

Is this normal, or could there be a fuel delivery issue and how would I diagnose that.

Again, it doesn't happen all the time.

Thanks for any advice.