Hi usalabs.

From a BIAB perspective, "sus" means "sus4". While there is no sus2 as such, the "2" chord would probably do what you want. Example G2.

These is also the "add2" chord which usually adds the 9th above the tonic and is not a 'sus' chord as such.

Lastly, because of the nature of sus4 chords, they have a relationship with sus2. The notes you give above for Gsus2 are the same notes as Dsus4. Thus, Gsus2 could also be played as Dsus/G (i.e. Dsus on a G bass).

Hope this helps,
Noel


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