2001 Tahoe Stalling (help!!)

I own a 2001 Chevy Tahoe 5.3L V8, for the past couple of months the truck has been acting up, stalling/bogging @ RPM's higher than 3000 approx. 85 mph (not all the time but about every week or 2), every time this happens I have to pullover turn off my car and restart it to get it to atleast drive home or wherever I'm going. Now all of a sudden it started stalling at low speed/idle as well, its much worse @ high rpm because the car does not even accelerate it's like if it were choking, we've changed the fuel filter, the air filter, and the EGR valve. Now my husband says it's probably the catalytic, someone please helpp me before I go broke trying to fix my car. I have adone a little research and I found the following TSB which apply to some of my problems, does anyone know where I could find a copy of these??? 02-06-05-004A/ 03-06-05-008/ 03-08-44-011/ 01-06-01-028A/ 01-08-64-014A

Go to www.z71ts.com and look under the tsb recalls. Good luck.

In Other Forums They Say The Solution Is To Clean The Throttle Body. My Truck Is Having The Same Problem (2001 Tahoe),i Will Do This To My Truck And Get Back To You.