Pregonar means "to proclaim" or "to preach." It's a less common verb than simply saying "to say" or "to announce," giving it a more formal and impactful feel.
In the context of the song, Aldo Trujillo uses it when he sings, "no son puestos verdes como lo han de pregonar" (they are not green positions as they proclaim them to be). He's suggesting that the opportunities or positions people talk about aren't as good or legitimate as they are made out to be, implying a sense of false advertising or grandstanding.
Aldo Trujillo's "Solo Me Vieron Pasar" is a fascinating glimpse into the mind of someone who's all about their business and doesn't care what anyone else thinks. He's on the boulevard, deep in thought, and honestly, he doesn't give a "que quieran opinar" [what they want to say]. He talks about money, not as "puestos verdes" [green stalls] but as something more significant, suggesting a world where perhaps the city itself will "te correrá" [run you].
He's serious about his security, always accompanied by "un par de carros" [a couple of cars], and he makes it clear that "este león no es como te lo pintan" [this lion is not as they paint it]. Despite his tough exterior, he's devoted to his "muñeca" [doll/sweetheart], giving his all for her. He's an important figure, someone whose presence is felt wherever he goes, always seizing the day because "la vida prisa va" [life goes fast]. He's ready to work, handling employees, news, and contracts to keep moving forward. And for his enemies? He has a blunt warning: "ojos tengan y no me vean, manos tengan y no me toquen, boca tengan y no me hablen, pies tengan y no me alcance" [may they have eyes and not see me, hands and not touch me, mouth and not speak to me, feet and not reach me]. It's a powerful and direct message from someone who knows his worth and isn't afraid to show it.