Former Peugeot driver Sebastien Bourdais will contest three United SportsCar Championship enduros with the Action Express team alongside his IndyCar Series campaign with KVSH Racing in 2014.
The Frenchman will share the lead Action Express Coyote-Chevrolet Daytona Prototype with full-season drivers Joao Barbosa and Christian Fittipaldi, who have re-signed from the team after a successful 2013, in the season-opening Daytona 24 Hours, the Sebring 12 Hours and Petit Le Mans at Road Atlanta.
The races make up three-quarters of the 'series within a series' North American Endurance Championship, which also includes the Watkins Glen 6 Hours at the end of June.
That event clashes with the Houston IndyCar weekend.
Bourdais, who took part in last weekend's official Sebring test with Action Express, said: "After securing a two-year deal in IndyCar with KVSH [formerly KV Racing Technology] as my main programme, it was my ambition to compete in the USC for the three long races.
"When the opportunity to race in a DP with Chevrolet presented itself, I immediately got pretty excited."
Bourdais, who raced for Dragon Racing in IndyCar in 2013, contested the final six races of this year's Grand-Am series aboard an 8Star Motorsports Corvette-bodied Coyote after being an occasional driver in the series since 2005.
He has one victory to his name after winning the inaugural Indianapolis road course sportscar fixture in 2012 aboard a Starworks Riley.