WOOD DALE, Ill., March 25, 2013 (GLOBE NEWSWIRE) -- Power Solutions International, Inc. (OTCBB:PSIX), a leader in the design, engineering and manufacture of emissions-certified alternative-fuel and conventional power systems, today announced a multi-year supply agreement with General Motors (GM) that will extend the company's product line targeted at On-Highway applications. PSI will use GM's 4.8-Liter and 6.0-Liter engines and associated transmission as the foundation for complete powertrain solutions for the medium-duty truck and bus market. The 4.8-Liter and 6.0-Liter represent additional power nodes complementing PSI's 8.8-Liter power system announced in 2012. With this product line extension, PSI believes it has one of the most comprehensive ranges of powertrains for vehicle OEMs in the Class 4 through Class 7 truck and bus market. PSI has been using GM engines for industrial applications since 1995. With this extension into on-highway applications, the agreement represents a strengthening of PSI's partnership with GM. "PSI is proud of its longstanding relationship with General Motors," said Gary Winemaster, Chief Executive Officer of PSI. "We have had great success in collaboration with GM in the industrial markets, and are confident this new extension into on-highway vehicles will be equally successful. There are many exciting opportunities for alternative fuel engines in the medium-duty truck and bus market, and we now have an extensive power system lineup to pursue these opportunities." "Our expanded product line can simplify our customers' operations, reduce complexity and unify support across all of our OEM customers' products," said Dan Grohoski, Director of New Business Development for PSI. "Our fuel-flexible engines allow fleets to select the fuel strategy that best fits their needs. In addition, reduced supply chain complexity is a significant benefit for our OEM customers. We enable them to work with a single control and software platform, one parts and servicing company, and one training system."