I FINALLY put the lines in with the new crimp about three weeks ago....So far so good. Hopefully this will be the last time I will have to deal with them leaking.
I always hit eBay first. Always surprised what you can find. https://www.ebay.com/itm/GM-12550863-Genuine-OEM-Escalade-Express-C1500-C2500-Fuel-Injection-Pump-Nut/192885790508?epid=11009609392&hash=item2ce8e3972c:g:fSkAAOSw3b9chYH-:sc:USPSFirstClass!06473!US!-1&frcectupt=true
I have done oil analysis using dino vs. synthetic with a 10K run. The numbers came back very close for each. I went back to regular dino and kept a big chunk of change in my pocket.