Although the 1989-94 Veraneio was made on a Série 20⁽¹⁾ chassis, I don't know if the [D-20] as chassis code is accurate. But if we keep it, then the 1989-94 Chevrolet Bonanza⁽²⁾ should have it too, as it was the 2-door version of the Veraneio.
Maybe a Brazilian contributor could help on this?
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(1) Portuguese writing, as seen in the Chevrolet brochure. Série 20 would maybe be more accurate than D-20, as the real name of this pickup was (pt):

1. C-20 as gasoline model;
2. A-20 when alcohol (ethanol) fueled version (mechanically identical to the C-20);
3. D-20 when sold with a diesel engine.

(2) Shouldn't "our" 6 Bonanza trucks be given the 1989 default model year?