That pump should be good, the 97 Tahoe spec is 56-62. Are you using SUBMERSIBLE fuel hose, or just fuel line from the parts store? There is a difference and it cost me a $500 tow home from a show in my camaro when the hose popped off in the tank and I couldn't repair it on the side of the road at 1:30am.
Verify you have the correct fuel hose and clamps on, and then check your connections again and re check fuel pressure. I ended up fighting a similar issue again in my Camaro where the correct fuel hose split and would give dead nuts fuel pressure at idle and light cruise, but give it any gas and it lost it. Took a while to find that one.
https://www.amazon.com/Gates-27097-S.../dp/B001R5XX56