Contreras Motorsports was a Mexican professional stock car racing team that fielded the No 71 full-size and heavy-duty pickup truck manufactured by who? 
Contreras Motorsports: Contreras Motorsports was a Mexican professional stock car racing team that competed in the NASCAR Camping World Truck Series. Chevrolet Silverado: The Chevrolet Silverado, and its mechanically identical cousin, the GMC Sierra, are a series of full-size and heavy-duty pickup trucks manufactured by General Motors and introduced in 1998 as the successor to the long-running Chevrolet C/K line.
i don't know