2001 Suburban stalls

My '01 stalls when slowing down or idle. Re-starts unlike other posters. Replaced wires, plugs, fuel filter with pickup better on acceleration but still stalls. RPMs are less that 500 when this happens.

(1) Is there a way to adjust up the idle, RPMs are woeful w/no pedal pressure

(2) Can throttle body be removed and cleaned? I've had this suggested.

(3) Any other way to get more RPMs at idle without using pedal and brake?

Have you checked for vacuum leaks? Have you tried having it scanned for trouble codes? These tips may help you narrow it down.