Wait...so that promo song was Non-Stop?! And @Samantha's reply makes it sound like it's connected to "KTRE 1993 News Theme", like I initially thought, and not "KSL 1989 News Theme", which is what I changed my mind to say it was connected to? I swear I hear the exact 4-note motif in both KSL 1989 and that promo song; that said, the KTRE 1993(-but-more-like-1988) package seems to have both those four notes and the notes that come after in the song, but the rhythm is different.
And I wonder...if that promo song actually was Non-Stop, and if KSL 1989 was the news package to which it was connected (only conjecture because I found that WAFF version of the promo dated 1988 - a year that WAFF was only using KSL 1989, while KTRE 1993 appears to be one of three packages they used in 1989 - and I thought the vocals sounded Tuesday-ish), then could KSL 1989 have also been Non-Stop, and not Tuesday? I always assumed it was Tuesday, it always sounded like Tuesday to me (almost like a quasi-sequel to News 88), and I thought I had gotten enough confirmation from Tom DiNoto before I submitted the composer ID to NMSA. But I went back and dug up his response from 2013, and he actually said "Sounds like us...but can't be sure." It still soundy Tuesday-esque to me...but is it really?
KSL and WAFF used KSL "1989", WAFF and KTRE used KTRE "1993", WAFF, KUSA and now apparently KLTV all used the same promo song which shares vague similarities to one or both of the aforementioned themes, and KUSA, KLTV and KTRE all used that Non-Stop "USA News" package whose NMSA samples sound very different (even though @promoguy98 can hear similarities, I haven't found them yet). What a crazy web of connections.