[LMP]

As soon you depress the trottle a little quickly, the TCC will opt out...and will come back with a new steady condition or minimal acceleration .
Which service manual did you buy ? (GM original, Haynes, other...)
Saw your video: I think you do have the original real glass headlights of '92 rather than the milky white plastic crap used in 93...then they returned to glass in 94, and went again to plastic the years after I think.
I had been able to replace my 93 plastics with glass from a 92 early in 94, but since then I had one damaged and the plastic replacement is already shot milky way compared to the remaining glass type.