
Andretti, 36, has just one previous start at the national level of the sport. Last year, he ran the NASCAR Xfinity race at the Charlotte Roval, finishing 36th after being collected in a mid-race crash.
His Truck debut will come this weekend at the Mid-Ohio Sports Car Course, driving the No. 7 Spire Motorsports Chevrolet Silverado. Gainbridge will serve as the primary sponsor.