 AUSTIN, Texas--BUSINESS WIRE--Hyliion Holdings Corp. NYSE: HYLN Hyliion, a leader in electrified powertrain solutions for Class 8 commercial semi-trucks, will be unveiling an improved model of its Hybrid system at the American Clean Transportation Expo in Long Beach, California. Designated the Hyliion Hybrid eX, this updated version of Hyliions sustainability-focused hybrid powertrain offers fleets a lighter solution that is easier to install, service, and operate. The Hybrid eX draws 